canonical · 0.0 capability resource

Metadata

Score 33.5 / 100 69 providers +423 via APIs 617 APIs Search apis.io →
Variants seen in the corpus: $MetadataMETADATAMeta DataMetadatametadata

Providers using this tag (69)

Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.

Strong 9 Solid coverage with minor gaps
Developing 24 Usable, with meaningful gaps to close
Thin 27 Limited public surface area
SoundchartsMusicAnalyticsMarket Intelligence1 API38.9University of LiverpoolEducationHigher EducationUniversityRussell Group14 APIs38.8Digital Public Library of AmericaCultural HeritageLibrariesArchivesMuseums1 API38.4University of ReadingUniversityHigher EducationEducationResearch3 APIs38.1PhraseanetDigital Asset ManagementMediaOpen-Source1 API37.9ACRCloudAudioMusic RecognitionAudio FingerprintingBroadcast Monitoring1 API37.6SecodaCompanyDeveloper ToolsData CatalogData Governance1 API37.6CoactiveCompanyArtificial IntelligenceMultimodal AIComputer-Vision1 API37.0RAWGDatabaseEntertainmentGame DiscoveryGames2 APIs36.8Kyushu UniversityUniversityHigher EducationEducationResearch1 API36.4TivoEntertainmentTelevisionMovies1 API36.1RasgoCompanyData WarehouseAnalyticsArtificial Intelligence1 API36.0TheGamesDBDatabaseGamingVideo Games2 APIs35.2Universität HamburgEducationHigher EducationUniversityGermany1 API34.8Apache TikaContent ExtractionDocument ProcessingText Extraction13 APIs34.5FatcatScholarlyResearchAcademicOpen Access1 API33.1SnapAPIScreenshotsPDFVideoWeb Scraping1 API33.1ACM Digital LibraryAcademicBibliographic RecordsCitationsComputing3 APIs32.4CrossrefCitationsDOIFundersIdentifiers1 API31.6University of AdelaideUniversityHigher EducationEducationAustralia5 APIs31.2Taylor & FrancisAcademicBooksJournals4 APIs30.4CaskCompanyBig DataData AnalyticsData Pipeline12 APIs30.1Apache AtlasApacheBig DataComplianceData Governance6 APIs29.9University of OtagoUniversityHigher EducationEducationNew Zealand5 APIs29.2Project GutenbergBooksEbooksPublic DomainLiterature1 API28.2Indian Institute of Technology KanpurEducationHigher EducationUniversityInstitute of Technology2 APIs28.0SimpleHashNFTBlockchainWeb3Cryptocurrency1 API26.2
Emerging 6 Early or largely undocumented
Minimal 2 Almost no public developer surface
Unrated 1 Not yet scored

APIs with this tag (611)

Ranked by the provider's API Evangelist rating — the Kin Score is scored per provider, not per API, so every API of a provider shares its band. How the rating works →

Exemplar 33 Complete, well-documented, and agent-ready
Salesforce Metadata APIThe Salesforce Metadata API is a SOAP-based API that enables developers to retrieve, deploy, create, update...87.5Dynatrace Custom Tags APIThe Dynatrace Custom Tags API allows you to manage custom tags on monitored entities within a Dynatrace env...86.5Centers for Medicare and Medicaid Services Metadata APIThe metadata API from Centers for Medicare and Medicaid Services — 3 operation(s) for metadata.81.3Mailchimp Metadata APIManage custom metadata fields that can be attached to messages for tracking and filtering.77.8Didomi metadata APIA metadata service76.6Microsoft Power Platform Metadata APIThe Metadata API from Microsoft Power Platform — 3 operation(s) for metadata.76.4Adobe Campaign Metadata APIDiscover resource schemas, fields, filters, and data policies for Campaign Standard resources.74.9Thanx Metadata APILook up merchants, locations, and scopes.74.9CData Metadata APIThe CData Cloud Metadata API exposes catalog information including schemas, tables, columns, keys, and stor...74.6Redocly Scout APIScout is Redocly's API-discovery service: it crawls connected Git remotes, tracks pull requests and runs jo...74.6Outbrain Meta Data APIThe Meta Data section represents the various values (Enumarations) that can be provided as part of the diff...73.4Microsoft Azure Metadata APIThe Metadata API from Microsoft Azure — 2 operation(s) for metadata.73.3Iterable Metadata APIStore and retrieve key-value metadata tables for use in personalization and campaign logic.73.0Postman Tags APIThe Tags API manages tags applied to APIs, collections, and workspaces for organization, governance reporti...72.5Jefferson Health Metadata APIFHIR conformance discovery.69.8Immutable Metadata APINFT Metadata Endpoints69.1Google Analytics metadata APIThe metadata API from Google Analytics — 1 operation(s) for metadata.69.0HERE Metadata API v1HERE Metadata API v1 — 10 operation(s) across 9 path(s), OpenAPI 3.0.2 version 1.2.0, harvested verbatim fr...68.4HERE Traffic Raster Tile API v3HERE Traffic Raster Tile API v3 — 5 operation(s) across 5 path(s), OpenAPI 3.0.2 version 3.2.0, harvested v...68.4Uphold Metadata APIMetadata.68.0Canvas Medical Metadata APIFHIR server capabilities67.8Confluence Content Properties APIStore and retrieve custom data against Confluence content.67.8Confluence Label Info APIRetrieve information about labels used across Confluence content.67.8Confluence User Properties APIStore and retrieve custom properties associated with Confluence users.67.8Confluence V2 Content Properties APIStore and manage custom properties on content using the Confluence Cloud REST API v2.67.8Confluence V2 Space Properties APIStore and retrieve custom properties on Confluence spaces using the v2 API.67.8Oracle Siebel Metadata APIDiscovery endpoints that return OpenAPI-compatible metadata describing available resources, fields, and ope...67.6Toast Metadata APIThe Metadata API from Toast — 1 operation(s) for metadata.67.6Toast Metadata APIThe Metadata API from Toast — 1 operation(s) for metadata.67.6Wappalyzer Metadata APIThe four anonymous, unauthenticated technology and category reference endpoints on the v2 host — the techno...67.6GitHub Meta APIUse the REST API to get meta information about GitHub, including the IP addresses of GitHub services.67.3Netlify Metadata APIThe Metadata API from Netlify — 1 operation(s) for metadata.67.3Ontraport Metadata APIObject metadata and field information.66.9
Strong 67 Solid coverage with minor gaps
Adobe Experience Cloud Metadata APIOperations for retrieving resource metadata66.0EPA — U.S. Environmental Protection Agency Meta Data APIAPI availability, change history, field definitions, known issues.65.2EPA — U.S. Environmental Protection Agency Metadata APIThe Metadata API from EPA — U.S. Environmental Protection Agency — 7 operation(s) for metadata.65.2Cloudflare Metadata APIRead metadata associated with keys.65.1Cloudera Data Catalog APIBrowse and update catalogued data assets, collections and data shares across a CDP account. 20 operations.64.9MediaMath Metadata API_64.5GitLab Metadata APIThe Metadata API from GitLab — 1 operation(s) for metadata.64.4PropelAuth Metadata APIAuthorization server metadata discovery64.4Dify Metadata APIOperations for managing knowledge base metadata fields and document metadata values. 7 operation(s) from th...64.0Freddie Mac Beyond ACESubmit property data report (PDR) data and photos to receive feedback messages and speed up your underwriti...64.0Unified.to metadata APIThe metadata API from Unified.to — 2 operation(s) for metadata.63.8Affinda Tags APITag management for parsed documents. Tags can be arbitrarily attached to documents to support routing, segm...63.1Cisco XDR Metadata APIThe Metadata API from Cisco XDR — 1 operation(s) for metadata.62.9QuickBooks Custom Fields APIThe QuickBooks Custom Fields API is a premium API that provides programmatic access to custom field definit...62.7Yoast Metadata APIThe Yoast Metadata API provides a PHP interface to add, alter, or remove metadata in the of a WordPress do...62.5Yoast Surfaces APIThe Yoast Surfaces API provides a PHP interface for retrieving SEO metadata programmatically within WordPre...62.5Landing.ai Metadata APIThe Metadata API from Landing.ai — 2 operation(s) for metadata.62.4Solo.io Metadata APIInternal credential metadata endpoints62.3GZW Data API Metadata APIThe Metadata API from GZW Data API — 4 operation(s) for metadata.62.0Eclipse Foundation Info APIREST API exposing Eclipse Foundation reference data — board members, registered trademarks and CVE records ...61.5Eclipse Foundation Web APIFoundation-wide REST APIs for accessing project data, releases, committer paperwork, GeoIP, downloads, mail...61.5Eclipse Project Adopters APIREST API listing the organisations that have declared adoption of an Eclipse Foundation project, per projec...61.5Eclipse Projects APIREST API exposing Eclipse Foundation project metadata, releases, committers, and project lifecycle data.61.5Temple Health Metadata APIFHIR conformance and SMART configuration discovery.61.1Backstage Metadata APIThe Metadata API from Backstage — 2 operation(s) for metadata.61.0Elsevier Metadata APIsThe Metadata APIs cover citation counts, the Citations Overview, and serial and non-serial title metadata a...60.9ServiceNow CMDB Meta APIThe ServiceNow CMDB Meta API provides REST endpoints for retrieving metadata about CMDB classes, including ...60.7Microsoft Metadata APIEntity and attribute metadata60.4Barchart Metadata APIThe Metadata API from Barchart — 8 operation(s) for metadata.60.2OCI Data Catalog APIREST APIs for managing a metadata catalog of data assets, enabling data discovery, governance, and understa...60.2Oracle Metadata APIThe metadata API from Oracle — 3 operation(s) for metadata.60.2Apollo.io Fields APIField and custom-field definitions across contacts, accounts and opportunities. 4 operation(s) from the pub...60.1Factiva DJID Taxonomy APIExplores the taxonomy of the Factiva databases using Dow Jones Intelligent Identifiers (DJID). Provides acc...59.3One Codex Metadata APIThe Metadata API from One Codex — 2 operation(s) for metadata.58.9ASAPP Metadata APIAPI to submit entity's attributes to ASAPP58.5Databricks Catalogs APIThe Databricks Catalogs API is part of Unity Catalog and allows you to create, update, list, and delete cat...58.3Databricks Metastores APIThe Databricks Metastores API is part of Unity Catalog and allows you to create, update, list, and delete m...58.3Azure Monitor Metadata APIOperations for retrieving Application Insights metadata58.2Zype Platform APIThe core Zype content API: videos, playlists, categories, subtitles and subtitle playlists, transcriptions ...58.1Zype Zobjects APIZype's custom-metadata model: Zobject Types define a schema (actor, director, team, season) and Zobjects ar...58.1mlsgrid Metadata APIOData service and EDMX metadata.58.0DataHub CLICommand line tool for interacting with DataHub. The datahub CLI allows you to perform common operations inc...57.4DataHub GraphQL APIPrimary API for querying and mutating metadata in DataHub. The GraphQL API serves as the main public API fo...57.4DataHub Java SDKJava client for interacting with DataHub. The io.acryl datahub-client package offers REST emitter APIs that...57.4DataHub REST APIThe Rest.li API represents the underlying persistence layer and exposes the raw PDL models used in storage....57.4ALTR Metadata APIOperations related to the currently logged in users metadata and current organizations metadata.56.9Bridge Metadata APIService document and CSDL schema discovery56.9Immuta Metadata APIAPIs used to retrieve metadata from Immuta to enrich the marketplace56.7ThoughtSpot Metadata APIThe Metadata API from ThoughtSpot — 16 operation(s) for metadata.56.2TU Wien Research Data OAI-PMHOAI-PMH 2.0 harvesting interface for the TU Wien Research Data repository. Verified live on 2026-08-30 with...56.2Amazon Redshift Metadata APIList databases, schemas, and tables in a Redshift data warehouse56.0MINDS@UW OAI-PMH EndpointLive OAI-PMH 2.0 harvesting endpoint for MINDS@UW, UW-Madison's institutional repository. Confirmed with ?v...56.0TMDB APIThe full TMDB REST API surface (v3). Covers movies, TV series, seasons, episodes, people, credits, images, ...56.0Fabric Origin Celebrity APIThe Celebrity API serves metadata about celebrities, including actors, directors, and other entertainment i...55.8Fabric Origin Entertainment APIThe Entertainment API ingests and serves metadata for movies, television shows, and games, including identi...55.8Fabric Origin Katch Media APIKatch genomic taste data — content broken into core attributes, organised into traits and content clusters.55.8Origin Studio MCP ServerA hosted Model Context Protocol server over Origin Studio — metadata records, catalog operations and availa...55.8Origin Studio Production APIThe Origin Studio metadata management API — records, record lifecycles, fields, datasets, media, credits, c...55.8DTN Metadata APIReturns layer metadata such as zoom levels, bounding boxes, etc.55.7Hatchet Metadata APIThe Metadata API from Hatchet — 3 operation(s) for metadata.55.7Autodesk Metadata APIThe Metadata API from Autodesk — 8 operation(s) for metadata.55.5Metadata APIAPI for retrieving, deploying, creating, updating, or deleting customization information such as custom obj...55.3Cambridge Shibboleth Identity Provider (SAML 2.0 metadata)The University's Shibboleth identity provider, publishing signed SAML 2.0 IdP metadata at https://shib.rave...55.2Login.gov Metadata APISAML 2.0 IdP metadata.54.8Salesforce Metadata APIAPI for managing customizations and building tools for application lifecycle management.54.7Lakekeeper Generic Table (Data) APILakekeeper's data-plane API served under /lakekeeper/v1, cataloging non-Iceberg table formats — Lance, Delt...54.6data.world Metadata Management APICreate, search, update, and delete catalog resources by IRI. Manage tables, columns, relationships, collect...54.3
Developing 195 Usable, with meaningful gaps to close
Editori (journals.helsinki.fi) OAI-PMH InterfaceOAI-PMH 2.0 endpoint for Editori, the University's open publishing service (PKP Open Journal Systems). Iden...54.1Helda OAI-PMH Metadata InterfaceOAI-PMH 2.0 harvesting endpoint for Helda. Identify returns repositoryName "Helda" with an earliest datesta...54.1HY Data Catalogue OAI-PMH InterfaceOAI-PMH 2.0 endpoint for the HY Data Catalogue. Identify returns repositoryName "HyDatacatalogue", adminEma...54.1Stanford Libraries PURL APIPersistent URLs into the Stanford Digital Repository. GET /{druid} returns HTML, /{druid}.xml returns the c...54.1Stanford University Metadata APIDigital Repository Objects54.1Authenticx Metadata APIThe Metadata API from Authenticx — 2 operation(s) for metadata.54.0YouSign Metadata APIExtra information attached to a Signature Request.53.8Acceldata Tag Services APICreate and manage tag keys and values, search across tagged key/value pairs, and associate or retrieve unif...53.7Inspectorio METADATA APIThe METADATA API from Inspectorio — 2 operation(s) for metadata.53.5UMedia Digital Collections JSON APIA read-only JSON API over UMedia, the University of Minnesota Libraries digital collections platform. Any s...53.4US Census Bureau Metadata APIPer-dataset variables, groups, geographies, and examples53.0Dane Badawcze UW OAI-PMH EndpointOAI-PMH 2.0 metadata harvesting endpoint for the University of Warsaw Research Data Repository (Dataverse)....52.9Picsart Metadata APIThe Metadata API from Picsart — 4 operation(s) for metadata.52.9ReIn UW OAI-PMH EndpointOAI-PMH 2.0 metadata harvesting endpoint for the Institutional Repository of the University of Warsaw. verb...52.9GUPEA Repository OAI-PMH 2.0 InterfaceGUPEA (Gothenburg University Publications Electronic Archive) is the Gothenburg University Library's instit...52.6Språkbanken Text Metadata API v3The catalogue over everything Språkbanken Text publishes — corpora, lexicons, models, analyses, utilities a...52.6DiVA OAI-PMHDiVA (Academic Archive On-line) is Uppsala University Library's institutional repository for publications a...52.5Abacus OAI-PMH Metadata Harvesting EndpointA working OAI-PMH 2.0 archive on UBC Library's own host. Verified live 2026-08-19: verb=Identify returns re...52.3Monetate Metadata APIRead-only API returning metadata about a Monetate account so that experience, page-event and custom-target ...52.2Databento Metadata APIDiscovery and cost-estimation endpoints for the historical catalog. List publishers, datasets, schemas, and...51.7dbt Metadata APIThe Metadata API from dbt — 1 operation(s) for metadata.51.7Hasura Metadata APIHasura metadata management.51.7Lone Wolf Technologies Metadata APIRetrieve metadata and property specifications for API resources51.4Metadata API (Experience Cloud)Deploy and retrieve Experience Cloud site configurations, navigation menus, and digital experience bundles....51.4Taylor's e-Repository OAI-PMHOAI-PMH 2.0 data provider for the DSpace CRIS e-Repository, Identifying as repositoryName "Taylor's Univers...51.4Taylor's Library OAI-PMHOAI-PMH 2.0 data provider exposed by the Koha-powered Taylor's Library catalog for harvesting bibliographic...51.4Frame.io Metadata APIManage Metadata and related operations.51.3Delinea Metadata APIMetadataController51.0Onshape Metadata APIAccess and modify metadata.51.0PicsArt (Socialin) Metadata APIThe Metadata API from PicsArt (Socialin) — 4 operation(s) for metadata.50.8Texas ScholarWorks OAI-PMH EndpointOAI-PMH 2.0 metadata-harvesting endpoint for Texas ScholarWorks. An Identify request returns repositoryName...50.8Sweep MCP ServerSweep's official hosted Model Context Protocol server — a remote SSE endpoint at https://sweepmcp.com/sse t...50.7Drive Labels APICreate and manage labels to organize and classify files in Google Drive.50.6Oracle Database Metadata APICollection metadata and catalog operations50.6Zenodo OAI-PMH APIOAI-PMH protocol endpoints50.6RELEX Solutions Metadata APIThe namespace for metadata contains the different endpoints for API metadata.50.5Elsevier Pure CRIS tenancy (REST + OAI-PMH)The University's tenancy of Elsevier Pure, its Current Research Information System, reached at pure.manches...50.4KU Leuven RDR OAI-PMH Harvesting InterfaceOAI-PMH 2.0 interface of the Research Data Repository, served from KU Leuven's own host. Identify returned ...50.4Lirias OAI-PMH Harvesting InterfaceLirias is the institutional publication repository of the KU Leuven Association, running on KU Leuven's own...50.4Tableau Metadata APIGraphQL-based API for querying metadata about Tableau content, data sources, and lineage information.50.4Letta Metadata APIService/runtime metadata.50.3SAP BI Tools Metadata APIProvider service endpoints for retrieving OData metadata documents describing the structure of models, dime...50.3LSEG World-Check One API Info APIRetrieve information about the public API, including the current API version.50.1NationGraph Metadata APIThe Metadata API from NationGraph — 1 operation(s) for metadata.50.0Coveo Metadata APIThe Metadata API from Coveo — 2 operation(s) for metadata.49.9turbopuffer Namespaces APINamespace lifecycle and metadata endpoints — list namespaces, read schema / dimensions / row count, warm th...49.9Skedulo Metadata APIThe Metadata API from Skedulo — 1 operation(s) for metadata.49.8Torii Metadata APIRetrieve field metadata for apps, users, and contracts.49.8WorkSpan Metadata APIThe Metadata API from WorkSpan — 6 operation(s) for metadata.49.4NHS England Metadata APIThe Metadata API from NHS England — 2 operation(s) for metadata.49.1HKU Scholars Hub OAI-PMHHKU Scholars Hub is the University's DSpace-based open-access institutional repository and current research...48.9Catalogo Coletivo ULisboa (Koha) — OAI-PMHOAI-PMH 2.0 interface over the union library catalog of the 18 schools, the National Museum of Natural Hist...48.6Cloudinary Admin APIThe Admin API supports bulk asset management (search, retrieval, update, delete, restore), and CRUD managem...48.6Repositorio da Universidade de Lisboa — OAI-PMHOAI-PMH 2.0 metadata harvesting interface over the DSpace 7.6.1 institutional open-access repository. Opera...48.6Universidade de Lisboa SAML 2.0 Identity Provider (RCTSaai / eduGAIN)The institution's central SAML 2.0 identity provider, published into the Portuguese national identity feder...48.6RWTH Publications OAI-PMHRWTH Publications is the institutional repository providing access to the publication output of RWTH Aachen...48.5INRIX Gateway Map Version APIReports the current INRIX map and XD network version in use, so consumers can align segment identifiers wit...48.2INRIX Metadata APIThe Metadata API from INRIX — 1 operation(s) for metadata.48.2MacSphere Institutional RepositoryMcMaster University Libraries' institutional repository of theses, dissertations and open-access research o...48.2IDEALS OAI-PMHThe OAI-PMH 2.0 data provider for IDEALS, the Illinois Digital Environment for Access to Learning and Schol...48.1Twenty GraphQL APIAuto-generated GraphQL API over the same workspace schema, exposing queries, mutations, batch upserts via p...48.0Codesphere metadata APIThe metadata API from Codesphere — 3 operation(s) for metadata.47.9UWA Research Repository OAI-PMHAn open, unauthenticated OAI-PMH 2.0 metadata harvesting endpoint operated by UWA on its own host. All six ...47.9Restaurant365 Metadata APIOData service metadata47.8Siemens PLM Metadata APIThe Metadata API from Siemens PLM — 3 operation(s) for metadata.47.8PURR OAI-PMH Metadata APIThe Purdue University Research Repository exposes an OAI-PMH 2.0 endpoint for harvesting research dataset m...47.7OpenMetadata Metadata APIThese APIs are for managing custom property definitions in OpenMetadata. Use these APIs to create custom pr...47.6Blizzard Entertainment Metadata APIRetrieve Hearthstone metadata reference data.47.4Utrecht University Repository OAI-PMHOAI-PMH 2.0 metadata harvesting interface for the Utrecht University Library institutional repository. Veri...47.4Crunchbase Metadata APIThe Metadata API from Crunchbase — 3 operation(s) for metadata.47.3Kaltura metadata APIMetadata service47.3Sun Life Metadata APIThe Metadata API from Sun Life — 1 operation(s) for metadata.47.3CaptivateIQ Metadata APIThe Metadata API from CaptivateIQ — 1 operation(s) for metadata.47.2Pendo.io Metadata APIThe Metadata API from Pendo.io — 9 operation(s) for metadata.47.0InCommon Federation registrationRice's identity provider is registered in InCommon, the US research and education identity federation, and ...46.9Rice Research Repository (DSpaceDirect tenancy) — OAI-PMHOAI-PMH 2.0 harvesting endpoint for the Rice Research Repository. Identify returns repositoryName "Rice Res...46.9Unlock Protocol Metadata APIThe Metadata API from Unlock Protocol — 4 operation(s) for metadata.46.9GT Digital Repository OAI-PMHPublic OAI-PMH 2.0 metadata harvesting interface for the Georgia Tech Digital Repository, the institutional...46.8GT Digital Repository REST APIDSpace 7.6 REST API for the Georgia Tech Digital Repository, providing programmatic read access to communit...46.8RePub OAI-PMH Metadata Harvesting InterfaceOAI-PMH 2.0 harvesting interface for RePub, the Erasmus University Rotterdam institutional publication repo...46.8Help Scout Custom Fields APIRead custom field definitions on inboxes and read / update custom field values on conversations.46.7University of Groningen Research Database OAI-PMHKeyless OAI-PMH 2.0 metadata-harvesting endpoint operated by the University on its own domain. Verified liv...46.7WUR Library OAI-PMH APIOpen, keyless OAI-PMH 2.0 harvesting interface over the WUR Publications repository — all six verbs verifie...46.7UGM Institutional Repository OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for "repository civitas UGM", the institutional repository running...46.6UGM Journals OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for "Jurnal Universitas Gadjah Mada", the university-wide scholarl...46.6Relativity Metadata APIThe Metadata API from Relativity — 1 operation(s) for metadata.46.4SAP HANA REST Info APIREST API for retrieving system information and metadata about SAP HANA Platform instances.46.3Spring Framework Metadata APIThe Metadata API from Spring Framework — 2 operation(s) for metadata.46.2Spring Framework Metadata APIDiscover available project options and capabilities46.2Packagist Metadata APIComposer v2 static metadata and change tracking.46.1ResearchSpace OAI-PMH 2.0 ServiceLive OAI-PMH 2.0 metadata harvesting endpoint for ResearchSpace, the University's self-hosted DSpace instit...46.1University of Auckland Shibboleth Identity Provider (SAML 2.0 metadata)The University's institutional identity provider, publishing SAML 2.0 metadata at https://iam.auckland.ac.n...46.1Bureau of Transportation Statistics Metadata APIDataset and view metadata46.0Polymarket Gamma APIRead-only metadata API for markets, events, tags, and categories - the surface that powers polymarket.com's...46.0DSpace Institutional Repository (Central Library)The IIT Bombay Central Library institutional repository, running DSpace over theses, journal articles and c...45.8Gremlin metadata APIGet metadata about the Gremlin commands.45.8Select Star metadata APIThe metadata API from Select Star — 5 operation(s) for metadata.45.8IRIS PoliTO OAI-PMH Metadata Service (CINECA deployment)OAI-PMH 2.0 harvesting service over IRIS, Politecnico di Torino's institutional research repository, reacha...45.7Politecnico di Torino Shibboleth Identity Provider (IDEM GARR / eduGAIN)Machine-readable SAML 2.0 identity-provider metadata for Politecnico di Torino, served from the university'...45.7Superchain RegistrySource-of-truth index of chains that are part of the Optimism Superchain — genesis files, deployment addres...45.6Ory metadata APIService Metadata45.4PKU Open Research Data Platform (OAI-PMH)OAI-PMH 2.0 metadata-harvesting endpoint for the Open Research Data Platform, verified responding to the Id...45.4Alteryx Connect APIAPI for Alteryx Connect data catalog and collaboration platform.45.2McGill University Authentication Service — Shibboleth SAML 2.0 Identity ProviderMcGill's SAML 2.0 identity provider and the only machine-readable surface in this profile that McGill itsel...45.1OSTI ELINK APIThe OSTI ELINK API is the Office of Scientific and Technical Information's submission and retrieval interfa...44.8Regrid Metadata APICoverage, usage, and data quality endpoints44.8Forethought Metadata APIInspect workspace-level Solve configuration.44.5IEEE Xplore DOI APIBatch metadata lookup endpoint that accepts up to 25 DOI (Digital Object Identifier) numbers per request an...44.4IEEE Xplore Metadata Search APIREST endpoint for querying and retrieving metadata records and abstracts for more than 6 million documents ...44.4uO Research OAI-PMHOAI-PMH 2.0 metadata-harvesting provider for uO Research. Probed 2026-09-01: Identify returns repositoryNam...44.4DiscGolfAPI Metadata APIDataset manifest and publication metadata.44.3AutoCAD Model Derivative APIAPI for translating AutoCAD design files into formats like SVF and SVF2 for rendering in the Viewer SDK, ex...43.9KURENAI OAI-PMH APIOAI-PMH 2.0 metadata harvesting interface for KURENAI, the Kyoto University Research Information Repository...43.8Orion Health Metadata APIServer capability and metadata operations43.8CMR Ingest APIREST API for creating, updating, and deleting metadata records in the Common Metadata Repository. Supports ...43.7OpenShift Metadata APIAPI for managing metadata resources including ConfigMaps, Secrets, Events, Namespaces, and ServiceAccounts.43.7PowerSchool Metadata APISystem metadata and configuration43.7Incus Metadata APIThe Metadata API from Incus — 1 operation(s) for metadata.43.6AmeriCorps Metadata APIRetrieve dataset metadata and schema information.43.5BC Data Catalogue CKAN APIThe BC Data Catalogue exposes a CKAN v3 REST API at https://catalogue.data.gov.bc.ca/api/3/action/ providin...43.5PHAIDRA OAI-PMH EndpointOAI-PMH 2.0 metadata harvesting interface for PHAIDRA, the University of Vienna's own institutional reposit...43.5Researcher Metadata Database (RMD) APIPenn State University Libraries' faculty and research metadata service, built and run in-house with OSVPR a...43.5Autodesk Fusion Metadata APIThe Metadata API from Autodesk Fusion — 4 operation(s) for metadata.43.4HappyOrNot metadata APIMetadata related endpoints and daa definitions43.4DepositOnce OAI-PMH InterfaceOpen Archives Initiative Protocol for Metadata Harvesting (OAI-PMH 2.0) endpoint for DepositOnce, TU Berlin...43.2CU Digital Repository OAI-PMHThe Charles University Digital Repository (Digitalni repozitar UK), a DSpace instance running on university...43.1CU Research Publications Repository OAI-PMHThe Charles University Research Publications Repository (Repozitar publikacni cinnosti UK), a DSpace instan...43.1CO-OPS Metadata API (MDAPI v1)The CO-OPS Metadata API exposes station inventory, harmonic constituents, NOS PORTS station lists, flood th...43.0KITopen OAI-PMH InterfaceKITopen is KIT's central open-access institutional repository for the bibliographic data, full texts, image...43.0NOAA InPort Metadata CatalogInPort is the authoritative metadata repository for NOAA Fisheries and the National Ocean Service and the N...43.0Enso metadata APIThe metadata API from Enso — 8 operation(s) for metadata.42.9POLITESI OAI-PMHA second, separate OAI-PMH 2.0 endpoint — the POLITESI archive of Politecnico di Milano theses and disserta...42.9Re.Public@Polimi OAI-PMHOAI-PMH 2.0 harvesting endpoint for IRIS Re.Public@Polimi, the institutional research product catalogue. Li...42.9Yr metadata APIService metadata endpoints42.9CMS Blue Button 2.0 Metadata APIFHIR capability statement.42.7DFN-AAI Identity Federation — University of Bonn Shibboleth IdPThe University of Bonn operates its own SAML 2.0 / Shibboleth Identity Provider and publishes signed metada...42.7Scalable Inference Serving Metadata APIServer and model metadata endpoints42.7Ghent University Academic Bibliography OAI-PMHOAI-PMH 2.0 harvesting endpoint for the Academic Bibliography. The live Identify response names the reposit...42.6Ghent University Library OAI ServiceAn OpenAPI 3.1 contract authored and open-sourced by Ghent University Library for the administrative side o...42.6Health Research Data Catalogue APIRetrieve metadata about NHS health datasets suitable for publication in health research catalogues. Enables...42.6NHS Digital Metadata APIThe Metadata API from NHS Digital — 2 operation(s) for metadata.42.6Dapr Metadata APISidecar metadata operations.42.5Research Repository UCD — OAI-PMH 2.0Keyless, anonymous OAI-PMH 2.0 metadata harvesting for UCD's open-access institutional repository. Verified...42.5Socket metadata APIThe metadata API from Socket — 5 operation(s) for metadata.42.5CMS — Centers for Medicare & Medicaid Services Metadata APIThe Metadata API from CMS — Centers for Medicare & Medicaid Services — 2 operation(s) for metadata.42.4NYCU Dataverse OAI-PMH EndpointAnonymous OAI-PMH 2.0 metadata-harvesting endpoint over the NYCU Dataverse research-data repository ("NYCU ...42.4NYCU Institutional Repository (DSpace deployment)國立陽明交通大學機構典藏 — the NYCU institutional repository, a self-hosted DSpace 11 deployment with content back to 2...42.4NYCU Institutional Repository OAI-PMH EndpointAnonymous OAI-PMH 2.0 harvesting endpoint over the NYCU institutional repository (國立陽明交通大學機構典藏), running ba...42.4SAP Commerce Cloud Metadata APIOData service metadata42.4SnapAPI Metadata APIThe Metadata API from SnapAPI — 1 operation(s) for metadata.42.4Elmi Research Portal — OAI-PMHHBKU's research information system, Elmi, runs Elsevier Pure on the university's own subdomain and exposes ...42.3LooksRare Collections APIRetrieve collection-level data for NFT collections indexed on LooksRare. Endpoints return Collection object...42.2LooksRare Tokens APIRetrieve NFT token metadata including token details, collection information, and token attributes for any t...42.2PUL Bibliographic Data Web Service (Bibdata)Princeton University Library's own bibliographic data service at bibdata.princeton.edu. A Rails application...42.1Pypestream Metadata APIThe Metadata API from Pypestream — 2 operation(s) for metadata.42.0Credit Benchmark Metadata APIMetadata discovery endpoints.41.9IIT Kharagpur Institutional Digital Repository OpenSearch InterfaceOpenSearch 1.1 query interface over the Central Library's Institutional Digital Repository, running DSpace ...41.9Lund University Publications OAI-PMHOAI-PMH 2.0 metadata-harvesting endpoint for the LUP research-output repository. Identify confirms reposito...41.9Lund University Publications unAPIunAPI 1 discovery service returning the alternate metadata formats available for LUP records, which is how ...41.9LUP Student Papers OAI-PMHOAI-PMH 2.0 harvesting endpoint for the LUP Student Papers repository. Identify confirms repositoryName "Lu...41.9Widen Metadata APIManage metadata fields and controlled vocabulary values.41.9SAP Business Intelligence Metadata APIBrowse BW/4HANA metadata catalog41.7Eigenpal Metadata APIAuthenticate and inspect the current API context.41.6Castor Metadata APIReference metadata such as countries.41.5Chalmers Open Digital Repository (ODR) OAI-PMHOAI-PMH 2.0 metadata harvesting interface for the Chalmers Open Digital Repository (ODR), which holds stude...41.5Chalmers Open Digital Repository (ODR) REST APIHAL+JSON REST API of the Chalmers Open Digital Repository, a DSpace 8.3 instance Chalmers runs on its own h...41.5Chalmers Research OAI-PMHOAI-PMH 2.0 metadata harvesting interface for the Chalmers Research portal (research.chalmers.se), covering...41.5Salesforce Tooling API (Flow)Tooling API endpoints for managing Flow definitions and metadata. Supports deployment, retrieval, and manag...41.2Mobula Metadata APIAsset and token metadata.41.0eDiss Göttingen OAI-PMH Metadata HarvestingOAI-PMH 2.0 harvesting interface for eDiss Göttingen, the university's electronic dissertations and theses ...40.8Elsevier Pure CRIS tenancyThe University's tenancy of Elsevier Pure, its Current Research Information System, at pure.soton.ac.uk. Pu...40.8ePrints Soton OAI-PMH InterfaceLive, open OAI-PMH 2.0 metadata harvesting for ePrints Soton, the University's institutional research repos...40.8ePrints Soton REST InterfaceRead-only REST interface over the ePrints Soton data model, exposing the repository's eprint, user and subj...40.8GDZ OAI-PMH Metadata HarvestingOAI-PMH 2.0 harvesting interface for the Göttinger Digitalisierungszentrum, operated by SUB Göttingen on th...40.8DataCite GraphQL APIAn alternative query interface for DOI metadata retrieval using the GraphQL query language. Currently suppo...40.7OpenUCT Institutional Repository OAI-PMHOpenUCT is the University of Cape Town's open access institutional repository, running DSpace 7.4 on UCT's ...40.6Springer Nature Metadata APIThe legacy Metadata API provides metadata retrieval for Springer publications. Returns article and book met...40.5Devtron Metadata APIApplication metadata and information retrieval40.4Kubeflow Pipelines Metadata APIAPI for tracking and managing metadata about ML artifacts, executions, and lineage information throughout t...40.3Tsinghua University Identity Provider — SAML 2.0 Federation MetadataTsinghua operates its own Shibboleth Identity Provider and publishes machine-readable SAML 2.0 metadata abo...40.3Acuant Metadata APISupported document types, subscriptions, logs40.2Frankfurter metadata APIAPI reference data like available currencies40.0iconik Metadata APICustom metadata fields, views, and values.39.9MSU Libraries Catalog OAI-PMHOAI-PMH 2.0 metadata harvesting provider over the MSU Libraries catalog, on the university's own host. Veri...39.9MSU Libraries Digital Repository OAI-PMHOAI-PMH 2.0 provider over the MSU Libraries Digital Repository at d.lib.msu.edu. Verified live on 2026-08-3...39.9UF Libraries Patron APIThe public read API of the George A. Smathers Libraries, backing the UF Digital Collections, the Digital Li...39.9CCH Tagetik Metadata APIThe Metadata API from CCH Tagetik — 1 operation(s) for metadata.39.8Tableau Metadata APIDiscover and query metadata about Tableau content using GraphQL, including workbooks, data sources, flows, ...39.8KFUPM ePrints OAI-PMH Repository InterfaceLive OAI-PMH 2.0 harvesting interface for the KFUPM ePrints institutional repository (EPrints 3.4.1), self-...39.6Planet Catalog APISTAC-based search and access layer over Planet imagery metadata, providing a standards-aligned interface to...39.6PowerShell Metadata APIOData service metadata.39.5FDAT Repository OAI-PMHOAI-PMH 2.0 metadata harvesting provider for the FDAT research data repository. Verified live 2026-09-01 — ...39.3Precisely APIs Metadata APIThe Metadata API from Precisely APIs — 2 operation(s) for metadata.39.3Rackspace Technology Metadata APIResource-level customer metadata.39.3Tickitto Metadata APIThe Metadata API from Tickitto — 1 operation(s) for metadata.39.3
Thin 223 Limited public surface area
SSO@UKM — SAML 2.0 Identity ProviderUniversiti Kebangsaan Malaysia's own SAML 2.0 identity provider, a SimpleSAMLphp deployment at sso.ukm.my. ...39.2The Bureau of Economic Analysis Metadata APIMethods for discovering available datasets, parameters, and valid values.39.2United States National Library of Medicine Metadata APIAPI metadata and field definitions39.2DataCat Research Data Catalogue OAI-PMHOAI-PMH 2.0 metadata-harvesting interface for DataCat, the University of Liverpool research data catalogue ...38.8University of Liverpool Repository EPrints RESTKeyless, read-only EPrints REST interface on the institutional repository. Verified live 2026-09-01: GET /r...38.8University of Liverpool Repository OAI-PMHOAI-PMH 2.0 metadata-harvesting interface for the University of Liverpool Repository, an EPrints 3.4.5 open...38.8Repositorio Institucional Seneca - OAI-PMHOAI-PMH metadata harvesting interface for "Seneca", the DSpace 7 institutional repository that collects the...38.7Revistas Uniandes - OAI-PMHOAI-PMH 2.0 metadata harvesting interface for the Revistas Uniandes scholarly journal portal — the only Uni...38.7Science Tokyo Repository OAI-PMH (JAIRO Cloud tenant)OAI-PMH 2.0 endpoint for the institution's tenancy on JAIRO Cloud — the successor repository named in the T...38.7T2R2 Research Repository OAI-PMHOAI-PMH 2.0 metadata harvesting interface for T2R2, the Science Tokyo / Tokyo Tech Research Repository, ope...38.7Pokémon TCG API Metadata APIThe controlled vocabularies used across cards - energy types, card subtypes, supertypes, and rarities.38.6GitLab CI/CD metadata APIOperations related to metadata of the GitLab instance38.4Oxen Metadata APIThe Metadata API from Oxen — 1 operation(s) for metadata.38.4CentAUR OAI-PMH Metadata APIOAI-PMH 2.0 metadata harvesting interface for CentAUR, the Central Archive at the University of Reading — t...38.1CentAUR Repository REST ListingsThe read-only EPrints REST interface on CentAUR. GET /rest/ returns the dataset index (eprint, user, subjec...38.1OSCAR/Surface REST APIThe OSCAR/Surface REST API provides programmatic access to the WMO Observing Systems Capability Analysis an...38.1Research Data Archive OAI-PMH Metadata APIOAI-PMH 2.0 metadata harvesting interface for the University of Reading Research Data Archive, the institut...38.1Research Data Archive REST ListingsThe same read-only EPrints REST interface on the Research Data Archive host. GET /rest/, /rest/eprint/ (47 ...38.1Tongji University Open PlatformThe university's own institutional data and capability API platform, operated by the Tongji University Info...38.1ePrints@IISc OAI-PMHePrints@IISc is the open-access institutional repository of IISc research publications, established in 2002...37.9ETD@IISc DSpace 6 REST APIRead-only REST API of ETD@IISc, the Electronic Theses and Dissertations repository IISc runs on DSpace 6 at...37.9Journal of the Indian Institute of Science OAI-PMHLive OAI-PMH 2.0 metadata-harvesting provider for the Journal of the Indian Institute of Science, served fr...37.9Maastricht University Research Portal OAI-PMHKeyless OAI-PMH 2.0 metadata harvesting endpoint operated by Maastricht University on its own domain. Verif...37.9Phraseanet Metadata APIRecord captions, metadata values, and status flags.37.9Seldon metadata APIThe metadata API from Seldon — 3 operation(s) for metadata.37.8Daring Foods Discovery APIThe self-describing metadata layer - route index (222 routes across 10 namespaces), registered post types, ...37.7Daring Foods Metadata APIPost types, taxonomies, statuses and authors.37.7Daring Foods oEmbed APIPublic oEmbed 1.0 provider endpoint for daring.com URLs, returning embeddable rich metadata - title, author...37.7Daring Foods SEO Metadata APIPublic Yoast SEO head endpoint returning the rendered SEO metadata and full schema.org JSON-LD graph for an...37.7United States Department of Agriculture Metadata APIAvailable years, states, reports, and variables37.7ACRCloud Metadata APILook up enriched third-party music metadata.37.6FINRA Metadata APIThe Metadata API from FINRA — 1 operation(s) for metadata.37.6Forest Service Research Data Archive Web ServiceSearch and retrieve DOI-registered Forest Service research data publications. Four REST endpoints — /search...37.4Gotham Greens Discovery APIPublic, unauthenticated site, content-type, taxonomy and status metadata — the self-describing route index ...37.4Gotham Greens oEmbed APIPublic oEmbed 1.0 provider endpoint for gothamgreens.com URLs, returning embeddable rich metadata for Journ...37.4Gotham Greens SEO Metadata APIPublic Yoast SEO head endpoint returning the rendered SEO/head metadata and its JSON-LD schema graph for an...37.4U.S. Forest Service Geospatial Data Discovery (DCAT-US catalog)The agency's Geospatial Data Discovery site publishes a machine-readable DCAT-US 1.1 / Project Open Data ca...37.4Lever Tags APIThe Tags API from Lever — 1 operation(s) for tags.37.3Eurostat Catalogue APIAPI for discovering all publicly available Eurostat datasets, browsing the navigation tree, and retrieving ...37.2Atlan GraphQL APIGraphQL interface for querying Atlan's knowledge graph, enabling flexible traversal of metadata relationshi...37.1Coconut Metadata APIRetrieve technical metadata for input and output files.37.0Cresilon Discovery APIPublic, unauthenticated site, content-type, taxonomy, status and author metadata — the self-describing rout...37.0Cresilon oEmbed APIPublic oEmbed 1.0 provider endpoint for cresilon.com URLs, returning embeddable rich metadata for Cresilon ...37.0Cresilon SEO Metadata APIPublic Yoast SEO head endpoint returning the rendered SEO/head metadata and its schema.org JSON-LD graph fo...37.0Simplecast Metadata APIAccount, categories, keywords, authors, and helper resources.37.0Workable Custom Attributes APIDefine and read custom attributes attached to candidates, jobs, and requisitions for tenant-specific report...37.0Polkadot Metadata APIThe Metadata API from Polkadot — 1 operation(s) for metadata.36.9Prometheus metadata APIRetrieve metric metadata such as type and unit.36.9Invendor Metadata APIThe Metadata API from Invendor — 1 operation(s) for metadata.36.8OPARA OAI-PMH Harvesting InterfaceThe standards-based harvesting interface for OPARA — how TU Dresden's research data reaches OpenAIRE, BASE,...36.8Varian Medical Systems Metadata APIFHIR server capability and metadata36.8NAGOYA Repository OAI-PMH (NII WEKO3 / JAIRO Cloud tenant)OAI-PMH 2.0 metadata harvesting interface for the NAGOYA Repository, Nagoya University's institutional repo...36.7ROR registration — Nagoya UniversityNagoya University is registered in the Research Organization Registry as ROR ID https://ror.org/04chrp450, ...36.7Archive ouverte UNIGE OAI-PMHOAI-PMH 2.0 metadata-harvesting interface for the Archive ouverte UNIGE institutional repository, exposing ...36.6Yareta OAI-PMH Provider APIThe OAI-PMH provider-information surface of the Yareta access module — sets, metadata formats and provider ...36.6Kyushu University Institutional Repository (QIR) OAI-PMHLive OAI-PMH 2.0 metadata harvesting interface for the Kyushu University Institutional Repository (QIR) and...36.4QIR / Kyushu University Collections Bulk Metadata (TSV via Handle)Quarterly full-metadata TSV exports for the Kyushu University Library digital collections, distributed thro...36.4Fivetran Metadata APIThe Metadata API from Fivetran — 1 operation(s) for metadata.36.3Physna Metadata APIThe Metadata API from Physna — 6 operation(s) for metadata.36.2TiVo Music Metadata APIThe TiVo Music Metadata API provides access to high-quality music information including artist details, alb...36.1mediaTUM OAI-PMH Repository InterfaceOAI-PMH 2.0 harvesting interface over TUM's institutional repository. Verified verbs Identify, ListMetadata...36.0Rasgo Metadata APITable metadata operations36.0Rippling Custom Fields APIDefine and read custom fields attached to employees, departments, and other Rippling resources for tenant-s...35.9UC Library Search / Primo VE Discovery (Ex Libris tenant)Library discovery for the Berkeley campus runs on Ex Libris Primo VE as part of the shared UC Library Searc...35.9KOARA OAI-PMH Metadata APIKOARA (KeiO Associated Repository of Academic resources) is Keio University's institutional repository, rel...35.8NHS API Metadata APIThe Metadata API from NHS API — 1 operation(s) for metadata.35.7Vanderbilt Television News Archive APIPublic read API behind tvnews.vanderbilt.edu, self-identifying as the "TVNA Serverless API" v1.0.0. Search,...35.7Curtin Research Data in Research Data Australia (ARDC)Curtin contributes research data collection records to Research Data Australia, the national registry run b...35.5Waikato SAML 2.0 Identity Provider in TuakiriThe University of Waikato's Shibboleth Identity Provider, entityID https://idp.waikato.ac.nz/idp/shibboleth...35.5SAP BW BAPI/RFC APIBusiness Application Programming Interfaces (BAPIs) and Remote Function Call (RFC) interfaces for SAP BW pr...35.3LSE Archives Catalogue (Epexio)The LSE Library archive catalogue at archives.lse.ac.uk runs on Epexio, a hosted archival discovery platfor...35.1LSE Digital Library (Quartex — IIIF / OAI-PMH)The LSE Digital Library publishes digitised and born-digital material from LSE Library collections. The hos...35.1LSE Research Online (EPrints, OAI-PMH)LSE Research Online is LSE's institutional repository — LSE's research outputs, LSE's metadata, LSE's regis...35.1Kubeflow Metadata APIAPI for tracking and managing metadata, artifacts, and lineage for ML workflows running on Kubeflow.34.9DFN-AAI / eduGAIN Federation MembershipUniversität Hamburg's IdP is registered in DFN-AAI, the German national identity federation and eduGAIN mem...34.8Digitized Collections (Kitodo.Presentation) OAI-PMHOAI-PMH 2.0 interface over the digitized collections of the Staats- und Universitätsbibliothek Hamburg, run...34.8E-Dissertationen (ediss.sub.hamburg) OAI-PMHOAI-PMH 2.0 metadata-harvesting interface for the DSpace-based institutional repository of electronic disse...34.8Hamburg University Press OAI-PMHOAI-PMH 2.0 interface of Hamburg University Press, the open-access publishing house of the Staats- und Univ...34.8HUP Journal Server OAI-PMHOAI-PMH 2.0 interface of the journal server of Hamburg University Press. Verified live 2026-09-01: reposito...34.8IRUA OAI-PMH Metadata InterfaceOpen Archives Initiative Protocol for Metadata Harvesting 2.0 interface for the Institutional Repository Un...34.8Open-Access-Portal Universität HamburgOpen Access discovery portal aggregating freely available publications, research data, teaching materials a...34.8Universität Hamburg Shibboleth SAML 2.0 Identity Provider MetadataThe institution's own SAML 2.0 Identity Provider metadata, served from its own host. entityID https://login...34.8ZFDM Repository OAI-PMHOAI-PMH 2.0 harvesting interface of the ZFDM Research Data Repository. Verified live 2026-09-01: repository...34.8Conductor OSS Metadata APIThe Metadata API from Conductor OSS — 4 operation(s) for metadata.34.6POSTECH OASIS Repository OAI-PMHAnonymous OAI-PMH 2.0 metadata harvesting over the POSTECH Library OASIS institutional repository. Verified...34.6Apache Tika Java APIThe Tika Java API provides the AutoDetectParser for automatic format detection and parsing, Metadata class ...34.5TSpace Institutional Repository (OAI-PMH) — tenant on ScholarisOAI-PMH 2.0 harvesting endpoint for TSpace, the University of Toronto Libraries institutional research repo...34.5USM Repository EPrints REST and ExportAnonymous read interface to Repository@USM beyond OAI-PMH, verified route by route on 2026-09-01. /rest/ ex...34.5USM Repository OAI-PMHOAI-PMH 2.0 metadata-harvesting interface for Repository@USM, the EPrints 3.3.16 institutional repository U...34.5UTORauth Shibboleth Identity Provider (SAML 2.0 metadata)The University of Toronto's Shibboleth identity provider, entityID https://idpz.utorauth.utoronto.ca/shibbo...34.5edoc OAI-PMHOAI-PMH 2.0 metadata harvesting interface for edoc. Identify reports repositoryName "edoc: Open Access Repo...34.4Terrain Discovery Environment API Metadata APIFile and data metadata annotation34.4OpenBU Repository — OAI-PMH and DSpace REST (Atmire-operated)OpenBU is Boston University Libraries' open-access institutional repository. The content, the collections a...34.3ParaSwap tokens APIReturn tokens list from Paraswap34.3Jupiter Tokens APISearch Solana tokens by mint, symbol, or name; fetch metadata, verification status, tags, and trading metri...34.2Perchwell Metadata APIOData service metadata.34.1Research Data Leeds Repository (OAI-PMH)The University of Leeds institutional research data repository, running EPrints 3 on the university's own i...34.0TOUR Institutional Repository OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for TOUR (TOhoku University Repository). The collection, the depar...34.0Warner Bros. Discovery Metadata APIContent metadata and manifest submission34.0Zora NFT GraphQL APIGraphQL API for querying NFT metadata, on-chain sales, mint events, collection attributes, and market stati...34.0Leiden University SAML 2.0 Identity Provider MetadataLeiden University's own SAML 2.0 identity-provider metadata document, authored and XML-DSig signed by Leide...33.9Scholarly Publications OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for Leiden University Scholarly Publications, the Islandora-based ...33.9NASA Metadata APIThe Metadata API from NASA — 1 operation(s) for metadata.33.4Revert Metadata APIEnvironment / app configuration for the connect UI.33.4Amiibo API Metadata APIAPI metadata endpoints33.3Candid Taxonomy APIReturns Candid's philanthropic classification system (subject, population, support-strategy, and geographic...33.3Climate Engine Metadata APIDataset dates, variables, county names, and raster classifications.33.3Thanos Metadata APIThe Metadata API from Thanos — 3 operation(s) for metadata.33.3HAL — ENPC Open-Access Collection (tenant)ENPC's institutional open-access repository is the ENPC collection inside HAL, the French national open arc...33.2L'Héritage des Ponts et Chaussées — IIIF Presentation API (tenant)ENPC's heritage digital library, holding more than 15,000 digitised documents from the school's collections...33.2Western Power Metadata APIThe Metadata API from Western Power — 2 operation(s) for metadata.33.2Glassnode Metadata APIThe Metadata API from Glassnode — 3 operation(s) for metadata.33.1Repository@Nottingham DSpace REST APIKeyless, read-only HAL+JSON REST API of the university's self-hosted DSpace 8.2 / DSpace-CRIS (cris-2024.02...33.0DFN-AAI federation membership (eduGAIN)TU Darmstadt's identity provider is published in DFN-AAI, the German research-and-education identity federa...32.9JokeAPI Metadata APIOperations describing the API surface — categories, flags, formats, languages.32.9Taddy Episode Chapters APIFetch chapter markers for an episode via getEpisodeChapters and the chapters field, returning chapter title...32.9Taddy iTunes Info APIResolve Apple Podcasts / iTunes metadata for a podcast with getItunesInfo and the itunesInfo field, includi...32.9Taddy Podcast Series & Episodes APILook up podcast series and episodes via getPodcastSeries, getPodcastEpisode, getMultiplePodcastSeries, getM...32.9TU Darmstadt Shibboleth Identity Provider (SAML 2.0 metadata)The university's own SAML 2.0 identity provider, operated by the Hochschulrechenzentrum (HRZ). Verified liv...32.9TUbiblio OAI-PMH (EPrints)TUbiblio is the publication bibliography of TU Darmstadt, on the institution's own host (tubiblio18.ulb.tu-...32.9TUdatalib OAI-PMHOAI-PMH 2.0 metadata harvesting interface for TUdatalib. Verified live 2026-09-01: Identify returns reposit...32.9tuprints OAI-PMH (EPrints)tuprints is the open-access publication repository of TU Darmstadt, on the institution's own host and regis...32.9Infinidat Metadata APIThe metadata API from Infinidat — 2 operation(s) for metadata.32.7SSO Metadata APISAML 2.0 metadata endpoints for exchanging federation configuration between identity providers and service ...32.7Apicurio Metadata APIThe Metadata API from Apicurio — 2 operation(s) for metadata.32.6SingularityNET Marketplace APIThe SingularityNET AI Marketplace REST API provides service discovery, organization management, and metadat...32.6IRIS Research Catalogue OAI-PMHOAI-PMH 2.0 metadata-harvesting provider for IRIS, Sapienza's institutional research information system and...32.5ACM Digital Library Citation Export APIThe ACM Digital Library provides citation export functionality supporting BibTeX, EndNote, and ACM Referenc...32.4ACM Digital Library Content Retrieval APIIndividual publications, conference papers, and journal articles in the ACM Digital Library are accessible ...32.4ACM Digital Library Search APIThe ACM Digital Library search endpoint allows programmatic querying of computing literature across ACM's f...32.4DDD Invenio Search and Export InterfaceThe repository's search endpoint returns machine-readable records when given an output format: of=xm yields...32.4DDD — Dipòsit Digital de Documents de la UAB (OAI-PMH 2.0)OAI-PMH 2.0 harvesting endpoint for UAB's institutional repository of theses, articles, preprints, postprin...32.4DIAL.mem OAI-PMHOAI-PMH 2.0 harvesting endpoint for DIAL.mem, UCLouvain's master's-thesis repository. Identify returns repo...32.4DIAL.pr OAI-PMHOAI-PMH 2.0 harvesting endpoint for DIAL.pr, UCLouvain's research-publications repository. Identify returns...32.4IFMuC — Inventari dels Fons Musicals de Catalunya (OAI-PMH 2.0)A third institution-operated OAI-PMH 2.0 endpoint, for the Inventory of Music Collections of Catalonia, a U...32.4OER-UCLouvain OAI-PMHOER-UCLouvain is the institution's open educational resources repository, running DSpace JSPUI on oer.uclou...32.4Open Data @ UCLouvain Dataverse OAI-PMHOAI-PMH 2.0 metadata-harvesting endpoint for the UCLouvain research-data repository. Identify returns repos...32.4Traces — Base de Dades de Llengua i Literatura Catalanes (OAI-PMH 2.0)A second institution-operated OAI-PMH 2.0 endpoint, for Traces, UAB's bibliographic database of Catalan lan...32.4Waseda IIIF Presentation API (Cultural Resources)Waseda University operates its own IIIF server for the Kotenseki Sogo Database (古典籍総合データベース) of classical J...32.4Waseda University Repository (OAI-PMH)OAI-PMH 2.0 metadata harvesting for the Waseda University Repository. The collection, the administrative co...32.4PMC OAI-PMH APIThe PMC OAI-PMH (Open Archives Initiative Protocol for Metadata Harvesting) API enables systematic harvesti...32.3Bigchaindb Metadata APIFull-text search over transaction metadata.32.2Oracle Database 19c Metadata APISchema and metadata catalog32.2Vineyard Metadata APIInspect and manage object metadata32.2Caltech Library FeedsA metadata service built and operated by Caltech Library (v1.6), harvesting its institutional repositories,...32.1CaltechDATA OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for CaltechDATA. Verified live 2026-08-19 via the Identify verb (r...32.1Enlighten EPrints REST APIAn anonymous read interface over the Enlighten repositories that the University of Glasgow does not documen...32.1Enlighten Publications OAI-PMHOAI-PMH 2.0 metadata harvesting over Enlighten, the University of Glasgow's EPrints institutional repositor...32.1Enlighten Research Data OAI-PMHOAI-PMH 2.0 metadata harvesting over Enlighten Research Data, the University of Glasgow's research data rep...32.1Enlighten Theses OAI-PMHOAI-PMH 2.0 metadata harvesting over Enlighten Theses, the University of Glasgow's electronic theses reposi...32.1TARA OAI-PMH (Trinity's Access to Research Archive)TARA is Trinity's open-access institutional repository, a DSpace deployment on Trinity's own host (www.tara...32.1InCommon Federation registration (urn:mace:incommon:asu.edu)ASU's registration in the InCommon Federation, retrievable as signed SAML metadata from the InCommon MDQ se...31.8Nutrical Solution Ltd Metadata APIPublic nutrient and allergen reference data.31.7NOAA ERDDAP Metadata APIInspect variable and attribute metadata for a specific dataset.31.6St Andrews Research Portal (Elsevier Pure tenancy)research-portal.st-andrews.ac.uk is the University's research information system and public research portal...31.5St Andrews Research Repository OAI-PMHOAI-PMH 2.0 endpoint for the DSpace-based St Andrews Research Repository, the University's open-access repo...31.5Repository at Hanyang University — OAI-PMHOAI-PMH 2.0 metadata-harvesting interface on Hanyang's institutional DSpace repository, plus an OpenSearch ...31.4ScholarBank@NUS DSpace REST APIThe HAL-style REST API of ScholarBank@NUS, the university's institutional repository — communities, collect...31.3ScholarBank@NUS OAI-PMH InterfaceOAI-PMH 2.0 metadata harvesting endpoint for ScholarBank@NUS, advertising twelve metadata formats including...31.3Burger Singh Discovery APIPublic, unauthenticated site, content-type, taxonomy, status and author metadata - the self-describing rout...31.2Burger Singh SEO Metadata APIPublic Yoast SEO head endpoint returning the rendered SEO/head metadata and its schema.org JSON-LD graph fo...31.2FAO FAOSTAT Metadata APIOperations for retrieving dataset and indicator metadata31.2Anaplan Financial Consolidation APIControls workflows, manages security, and supports retrieval, insertion, update, and deletion of financial ...31.0Sydney eScholarship Repository (institutional repository, OAI-PMH)Sydney eScholarship is the university's own institutional repository, running on the university-owned usyd....30.7Comcast Open Ingest APIThe Comcast Open Ingest endpoint accepts metadata and content asset packages from NBCUniversal media partne...30.6BORIS Portal OAI-PMH EndpointOAI-PMH 2.0 metadata-harvesting endpoint for BORIS Portal, the University of Bern's institutional repositor...30.5University of Rochester Shibboleth Identity ProviderSAML 2.0 / Shibboleth identity provider metadata for the University of Rochester, published machine-readabl...30.2UR Research OAI-PMH InterfaceOAI-PMH 2.0 metadata harvesting interface for UR Research, the University of Rochester's legacy institution...30.2CDAP Metadata MicroservicesSearch, annotate, and retrieve business and technical metadata and lineage for CDAP entities such as applic...30.1Juvenescence Discovery APIThe juvlabs.com REST discovery surface — site index, `wp/v2` namespace route index with per-argument schema...30.1ZORA Repository OAI-PMHThe Zurich Open Repository and Archive (ZORA) is UZH's institutional repository for the peer-reviewed resea...30.11inch Token APIToken metadata and discovery endpoints.29.9Anaconda.org Package APIREST API hosted on api.anaconda.org that provides read access to conda-forge package metadata including pac...29.9conda-forge Channel Repodata APIStatic JSON index files served over HTTPS from conda.anaconda.org for each supported platform subdirectory ...29.9HAL Search API — SORBONNE-UNIVERSITE collectionThe HAL Solr search API scoped to Sorbonne University's collection at https://api.archives-ouvertes.fr/sear...29.8HAL Sorbonne Universite Open Archive — OAI-PMH (Sorbonne scope)Sorbonne University's open archive of scholarly publications, harvestable over OAI-PMH 2.0 at the Sorbonne-...29.8Docta Complutense OAI-PMH EndpointOAI-PMH 2.0 harvesting endpoint for Docta Complutense, on UCM's own host. Probed 2026-08-30: verb=Identify ...29.6IRIS UNIPD OAI-PMHOAI-PMH 2.0 harvesting endpoint for IRIS UNIPD, the University of Padua's institutional research catalogue ...29.6UniversiDATA CKAN Dataset APICKAN-compatible metadata API of the UniversiDATA consortium platform, supporting current_package_list_with_...29.6UniversiDATA DCAT Catalog APIDCAT catalogue endpoint of UniversiDATA, addressed per participating university by acronym. The UCM catalog...29.6Aarhus University OAI-PMH Metadata ServiceOpen Archives Initiative Protocol for Metadata Harvesting 2.0 service for Aarhus University's research reco...29.5Memberful Members APIQuery members and their profiles, emails, subscriptions, downloads, and custom JSON metadata (up to 50 keys...29.4OData $Metadata APIThe $Metadata API from OData — 1 operation(s) for $metadata.29.3OData Service APIStandard OData service endpoints including service document, metadata document, entity set CRUD operations,...29.3QU Press Open Journal System OAI-PMH APIQatar University Press self-hosts Open Journal Systems 3.3.0.7 at journals.qu.edu.qa and exposes an anonymo...29.3University of Copenhagen CURIS OAI-PMH Repository InterfaceA complete, unauthenticated OAI-PMH 2.0 repository operated by the university on its own host. verb=Identif...29.31inch NFT APIWallet NFT holdings, collection metadata, and floor prices across supported chains.29.21inch Token APIToken metadata, lists, search, and verification across all 1inch-supported networks.29.2Otago Scholarly Identifier Registrations (DataCite + Crossref)Otago's persistent-identifier registrations, readable through each registry's public REST API. Confirmed li...29.2OUR Archive OAI-PMH Metadata — Ex Libris Esploro tenancyOUR Archive (Otago University Research Archive) is the University's institutional research repository. The ...29.2Promethium APIREST API for Promethium's agentic data platform — tenant-scoped OAuth2 authentication, datamap search and c...29.2InCommon Federation IdP MetadataOhio State's SAML 2.0 Identity Provider as published in the InCommon Federation metadata aggregate, retriev...28.9Knowledge Bank OAI-PMH InterfaceOAI-PMH 2.0 metadata harvesting endpoint for the Knowledge Bank institutional repository, supporting the st...28.9Queen Mary Research Online (QMRO) — DSpace 8.4 REST APIQueen Mary's open-access institutional repository runs DSpace 8.4 and exposes the standard DSpace REST API ...28.8Denodo Data Catalog REST APIThe Denodo Data Catalog REST API provides programmatic access to the catalog of virtual views, web services...28.7HAL OAI-PMH — ens-lyon collectionOAI-PMH 2.0 harvesting endpoint scoped to ENS de Lyon's named collection on HAL, the French national open a...28.6RENATER Fédération Éducation-Recherche entity (ENS de Lyon IdP)ENS de Lyon's Identity Provider as registered by RENATER, France's national research and education network,...28.6UTM Institutional Repository (UTM-IR) EPrints OAI-PMH — unreachableThe older EPrints institutional repository, registered with ROAR (record 1358), OpenDOAR and Sherpa (record...28.4Adionics Discovery APIPublic, unauthenticated discovery metadata for adionics.com — the self-describing REST route index (370 rou...28.3ARC API DiscoveryThe self-describing route index for the arc.gov WordPress REST API — 371 routes across 16 namespaces, each ...28.3ARC Taxonomy APIAnonymous read access to the 34 controlled vocabularies ARC classifies its content with — states_counties (...28.3OpenCitations Metadata APIOperations for retrieving bibliographic metadata28.3Accelsius API DiscoveryThe WordPress REST route-discovery documents served at accelsius.com/wp-json/ and accelsius.com/wp-json/wp/...28.2Gutendex APIGutendex is a JSON web API for Project Gutenberg ebook metadata. It provides access to the catalog of 75,00...28.2SAML Metadata APISAML 2.0 metadata retrieval.28.2AUB ScholarWorks OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for AUB ScholarWorks. Identify returns repositoryName "AUB Scholar...28.0IIT Kanpur PKK Library OAI-PMH APIOAI-PMH 2.0 metadata-harvesting endpoint for the P.K. Kelkar Library catalog, operated on the institution's...28.0IIT Kanpur ROR Registry RecordIIT Kanpur's registration in the Research Organization Registry (ROR), identifier https://ror.org/05pjsgx75...28.0TUF Repository SpecificationThe TUF specification defines the structure of update repositories including the root, targets, snapshot, a...28.0TAU Libraries Alma OAI-PMH Metadata HarvestingOpen Archives Initiative Protocol for Metadata Harvesting 2.0 service for the Tel Aviv University library r...27.8Loughborough University Research Repository (figshare tenancy)The Loughborough Research Repository is the university's institutional repository for all research outputs,...27.5AURA OAI-PMH Metadata Harvesting (tenancy on Edinburgh IS infrastructure)AURA's OAI-PMH 2.0 endpoint, repositoryName "Aura", repositoryIdentifier aura.abdn.ac.uk, adminEmail aura-m...27.3Elsevier Pure CRIS tenancy (research portal, REST + OAI-PMH)The University's tenancy of Elsevier Pure, its current research information system, published as "The Unive...27.3National Archives and Records Administration (NARA) Metadata APIThe Metadata API from National Archives and Records Administration (NARA) — 1 operation(s) for metadata.27.1National Archives and Records Administration Metadata APIThe Metadata API from National Archives and Records Administration — 1 operation(s) for metadata.27.1AMS Acta Institutional Repository OAI-PMHOAI-PMH 2.0 metadata-harvesting provider for AMS Acta, the AlmaDL institutional research repository, self-h...27.0Battle.net Metadata APIHearthstone metadata including sets, classes, types, and keywords27.0IRIS Research Information System (CINECA tenancy)IRIS is the university's current research information system and publication catalogue, reachable at cris.u...27.0MyAgric — Malaysian Agricultural Repository OAI-PMH 2.0OAI-PMH 2.0 metadata harvesting for MyAgric, the Malaysian Agricultural Repository, a national-scope agricu...26.9PSASIR Institutional Repository — OAI-PMH 2.0OAI-PMH 2.0 metadata harvesting for the Universiti Putra Malaysia Institutional Repository, running EPrints...26.9IIT Delhi Institutional Repository OAI-PMHOAI-PMH 2.0 metadata-harvesting interface for the IIT Delhi DSpace 8 institutional repository, on the insti...26.8OpenClinica Metadata APIRead ODM study design metadata.26.5SimpleHash NFT & Token APIMulti-chain REST API providing NFT metadata, ownership, transfers, floor prices, listings, bids, spam score...26.2
Emerging 93 Early or largely undocumented
Griffith Research Online (GRO) DSpace REST APIREST API for Griffith Research Online, the university's institutional repository, running DSpace 7.6. Serve...26.1Griffith Research Online OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for Griffith Research Online. The Identify response returns reposi...26.1UTPedia Institutional RepositoryUTPedia ("UTP Electronic and Digital Intellectual Asset") holds theses, dissertations and final-year projec...26.1Biblos-e Archivo OAI-PMH EndpointOAI-PMH 2.0 metadata-harvesting endpoint for Biblos-e Archivo. Identify returns repositoryName "Biblos-e Ar...25.9Portal de Revistas Electrónicas de la UAM — OAI-PMH EndpointOAI-PMH 2.0 endpoint over the university's Open Journal Systems 3.3.0.6 installation, which hosts UAM's ele...25.9AI Catalog ManifestThe publishing half of the standard — the JSON manifest a domain serves at /.well-known/ai-catalog.json dec...25.7Crossref Member 4386 (Universitas Indonesia)University of Indonesia is a Crossref member and DOI registrant. Verified against the Crossref REST API: ht...25.5OlympusDAO Metadata APIDate bounds and indexer metadata.25.5UI Research Portal (Elsevier Pure tenant)scholar.ui.ac.id is University of Indonesia's Elsevier Pure Portal — HTTP response header x-product "Pure P...25.5UI Scholars Hub OAI-PMH (bepress Digital Commons tenant)OAI-PMH 2.0 metadata-harvesting interface for UI Scholars Hub, the university's institutional research repo...25.5Copernicus Marine CSW Catalogue APIThe Copernicus Marine Catalogue Service for the Web (CSW) provides OGC-compliant metadata discovery over th...25.4EgeriaEgeria is the world's first open source metadata standard for enterprise data management, enabling unified ...25.4MarquezMarquez is an open source metadata service for the collection, aggregation, and visualization of a data eco...25.4OpenLineageOpenLineage is an open standard and API for collecting lineage metadata across data pipelines.25.4lakeFS metadata APIThe metadata API from lakeFS — 2 operation(s) for metadata.25.3DADUN Institutional Repository (OAI-PMH)DADUN (Deposito Academico Digital de la Universidad de Navarra) is the university's open-access institution...24.9Harbinger Motors Discovery APIThe self-describing layer of the harbingermotors.com WordPress REST API — the root index that enumerates al...24.9Harbinger Motors SEO Metadata APIThe Yoast SEO `get_head` endpoint on harbingermotors.com. For any site URL it returns the fully rendered he...24.9Lexion Contract RepositoryCentralized intelligent repository for agreements, surfacing contracts, parties, key dates, and metadata. L...24.9Revistas Cientificas OAI-PMH (Servicio de Publicaciones)Live OAI-PMH 2.0 metadata harvesting interface over the university press's journal portfolio, running on a ...24.9Addis Energy Discovery APIPublic, unauthenticated discovery metadata for addisenergy.com — the self-describing route index (218 route...24.8Addis Energy oEmbed APIPublic oEmbed 1.0 provider endpoint for addisenergy.com URLs, returning embeddable rich metadata — title, a...24.8NetSuite SuiteTalk REST Web ServicesREST-based interface to NetSuite business objects as JSON resources with CRUD operations, SuiteQL high-perf...24.6Nusano Discovery APIType, taxonomy and status descriptors that describe the shape of the nusano.com content collections — the s...24.6Research Portal (Elsevier Pure) OAI-PMH — Bath tenancyOAI-PMH 2.0 harvesting interface served by the University's Elsevier Pure tenancy, advertising the OpenAIRE...24.6Research Portal (Elsevier Pure) Web Service — Bath tenancyThe University's Elsevier Pure research information system exposes the Pure Web Service under a Bath hostna...24.6Dipòsit Digital OAI-PMHOAI-PMH metadata-harvesting endpoint for the Dipòsit Digital de la Universitat de Barcelona, used for harve...24.4Revistes Científiques de la UB (OJS) — OAI-PMH 2.0Open Journal Systems platform self-hosted by UB at revistes.ub.edu, publishing the university's scholarly j...24.4Netflix Conductor Metadata APIThe Metadata API from Netflix Conductor — 4 operation(s) for metadata.24.2Repositorio Académico DSpace REST APIThe DSpace 6 REST API on the University of Chile institutional repository, not catalogued before this run. ...24.1Repositorio Académico OAI-PMHOAI-PMH 2.0 provider on the University of Chile institutional repository (Repositorio Académico), managed b...24.1UC Research Repository DSpace REST APIDSpace 7 REST API backing the UC Research Repository, providing programmatic access to communities, collect...24.1UC Research Repository OAI-PMHOAI-PMH 2.0 metadata harvesting interface for the UC Research Repository, a self-hosted DSpace 7 institutio...24.1UC Shibboleth SAML 2.0 Service Provider MetadataThree Shibboleth Service Providers run on University of Canterbury hosts and publish machine-readable SAML ...24.1UChile Research Data Repository OAI-PMHOAI-PMH 2.0 provider on the University of Chile Dataverse installation. Confirmed live on 2026-09-01: ?verb...24.1XGS Energy Discovery APIPublic, unauthenticated discovery metadata for xgsenergy.com — the self-describing route index (266 routes ...24.1XGS Energy oEmbed APIPublic oEmbed 1.0 provider endpoint for xgsenergy.com URLs, returning embeddable rich metadata — provider, ...24.1DiVA Institutional Repository (OAI-PMH)Stockholm University's publication records are harvestable over OAI-PMH 2.0 from its DiVA instance at su.di...24.0Crystal Reports Metadata APIReport structure and metadata23.8ENS-PSL Library Catalogue (Koha REST + OAI-PMH)The catalogue of the ten ENS-PSL libraries, hosted at catalogue.bib.ens.psl.eu under the institution's own ...23.8Lane API Metadata APIThe Metadata API from Lane API — 1 operation(s) for metadata.23.8Denbury Resources Discovery APIPublic, unauthenticated access to the self-describing surface of the Denbury Inc. WordPress REST API — regi...23.7Aegis Marine Shipmanagement Discovery APIAnonymous discovery metadata for aegisships.com — the self-describing route index (90 routes across 6 names...23.6Aegis Marine Shipmanagement oEmbed APIPublic oEmbed 1.0 provider endpoint for aegisships.com URLs, returning embeddable rich metadata — title, pr...23.6Aegis Marine Shipmanagement SEO Metadata APIPublic Yoast SEO endpoint returning the rendered head metadata, and its parsed schema.org JSON-LD graph, fo...23.6data.gov (CKAN catalog)The U.S. federal open data catalog at catalog.data.gov, powered by the open-source CKAN platform. The CKAN ...23.4Hydrostor Discovery APIPublic, unauthenticated discovery metadata for hydrostor.ca — the self-describing route index (340 routes a...23.4Hydrostor oEmbed APIPublic oEmbed 1.0 provider endpoint for hydrostor.ca URLs, returning embeddable rich metadata — title, auth...23.4Hydrostor SEO Metadata APIPublic Yoast SEO head endpoint returning the rendered head metadata and its parsed schema.org JSON-LD graph...23.4National Energy System Operator Metadata APIRetrieve metadata for datasets and resources.23.3GakuNin Academic Access Management FederationMembership of GakuNin (学術認証フェデレーション), the Japanese national academic identity federation operated by the Na...23.2Arbor Biotechnologies Metadata APIRegistered post types, taxonomies and statuses.23.0CallMiner Eureka Ingestion APIAsynchronously add or update media and metadata for audio and text-based contacts in a CallMiner Eureka ten...23.0AeroFarms Discovery APIThe public route index and registry surface of the AeroFarms REST API — 917 registered routes across 46 nam...22.4Queen's University Belfast Research Portal — OAI-PMH harvesting endpointLive OAI-PMH 2.0 metadata harvesting endpoint for the QUB Research Portal. Identify returns repositoryName ...22.0Orange Logic Metadata APIList and modify asset metadata - retrieve all metadata fields, update tags and linked fields, and manage la...21.3Lens Storage & MetadataLens content (post body, media, profile metadata) is stored as JSON following the Lens Metadata Standards a...21.0Habiteo Site Content API — Discovery APIThe wp-json route index and the registered post types and statuses — the route-discovery surface this profi...20.9CityUHK Scholars OAI-PMHPublic OAI-PMH 2.0 endpoint for CityUHK Scholars, the university's research information system and institut...20.8Federal Emergency Management Agency Metadata APIAPI and dataset metadata20.6Fast Healthcare Interoperability Resources Metadata APIThe Metadata API from Fast Healthcare Interoperability Resources — 1 operation(s) for metadata.20.5Tokamak Energy Discovery APIThe machine-readable description of the Tokamak Energy content API itself — the REST root document, the reg...20.4Yummly Metadata API (Historical)DEPRECATED / HISTORICAL. The Metadata endpoints (GET http://api.yummly.com/v1/api/metadata/{key}) returned ...20.2Envisics Discovery APIPublic, unauthenticated discovery metadata for envisics.com — the registered content types and taxonomies, ...20.1Envisics oEmbed APIPublic oEmbed 1.0 provider endpoint for envisics.com URLs, returning embeddable rich metadata — title, auth...20.1Envisics SEO Metadata APIPublic Yoast SEO head endpoint returning the rendered head metadata and its parsed JSON-LD schema.org graph...20.1Kateeva Discovery APIPublic, unauthenticated discovery metadata for kateeva.com — the self-describing route index (271 routes ac...20.1Kateeva oEmbed APIPublic oEmbed 1.0 provider endpoint for kateeva.com URLs, returning embeddable rich metadata — title, autho...20.1Kateeva SEO Metadata APIPublic Yoast SEO head endpoint returning the rendered head metadata and its parsed JSON-LD schema.org graph...20.1Eridu Discovery APIAnonymous, unauthenticated discovery metadata for eridu.ai — the self-describing route index (167 routes ac...19.7Eridu oEmbed APIPublic oEmbed 1.0 provider endpoint for eridu.ai URLs, returning embeddable rich metadata — title, author, ...19.7EnergyX Discovery APIPublic, unauthenticated discovery metadata for energyx.com — the self-describing route index (1,233 routes ...19.5EnergyX oEmbed APIPublic oEmbed 1.0 provider endpoint for energyx.com URLs, returning embeddable rich metadata — title, autho...19.5EnergyX SEO Metadata APIPublic Yoast SEO head endpoint returning the rendered head metadata and its parsed JSON-LD schema.org graph...19.5Cruz Foam Discovery APIPublic, unauthenticated discovery metadata for cruzfoam.com — the self-describing route index (487 routes a...19.4Cruz Foam oEmbed APIPublic oEmbed 1.0 provider endpoint for cruzfoam.com URLs, returning embeddable rich metadata — title, auth...19.4Cruz Foam SEO Metadata APIPublic Yoast SEO head endpoint returning the rendered head metadata and its parsed JSON-LD schema.org graph...19.43Bar Biologics Discovery APIPublic, unauthenticated discovery metadata for 3barbiologics.com — the self-describing route index (360 rou...18.93Bar Biologics oEmbed APIPublic oEmbed 1.0 provider endpoint for 3barbiologics.com URLs, returning embeddable rich metadata — provid...18.93Bar Biologics SEO Metadata APIPublic Yoast SEO head endpoint returning the rendered head metadata and its parsed schema.org JSON-LD graph...18.9Metalenz Discovery APIThe self-describing surface of the metalenz.com WordPress REST API — the route index, the per-namespace ind...18.9Aira Technologies Discovery APIPublic, unauthenticated discovery metadata for aira-technology.com — the self-describing route index (206 r...18.5Aira Technologies oEmbed APIPublic oEmbed 1.0 provider endpoint for aira-technology.com URLs, returning embeddable rich metadata — titl...18.5CPIR Site Metadata APIThe anonymously readable metadata layer of the parentcenterhub.org WordPress REST API - the discovery root ...18.3Amazon Web Services Metadata APIThe Metadata API from Amazon Web Services — 3 operation(s) for metadata.17.4Java Reflection APIExamine and modify the runtime behavior of applications by inspecting classes, methods, fields, and annotat...17.4Alzheon Metadata APIRegistered types, taxonomies and statuses.17.3Norgate Data Futures MetadataFutures-specific reference data covering around 100 markets across 11 worldwide exchange groups - market an...17.3Norgate Data Security Metadata and ClassificationsSingle-value reference and metadata lookups for a security - name, symbol, asset id, domicile, currency, ex...17.3Norgate Data Watchlists and DatabasesEnumerate and resolve the security lists in the local database - user and Norgate-maintained watchlists, bu...17.3Collibra Core REST APIThe Collibra Core REST API exposes the full Collibra Platform for programmatic management of communities, d...12.5Collibra Knowledge Graph GraphQL APIThe Knowledge Graph GraphQL API enables retrieval of Collibra assets, relations, communities, domains, and ...12.5Podchaser GraphQL APIPodchaser's GraphQL API provides programmatic access to podcasts, episodes, creators, credits, reviews, and...12.0

Companies reaching this through an API (423)

These companies publish an API, specification or operation carrying “Metadata” but do not classify their business under it. Listed unranked and kept out of the count above, because one tagged operation is not a statement about what a company does.

1inch 1inch 3Bar Biologics Aarhus University Acceldata Accelsius Acuant Addis Energy Adionics Adobe Campaign Adobe Experience Cloud Aegis Marine Shipmanagement AeroFarms Affinda Agentic Resource Discovery (ARD) Aira Technologies Alteryx ALTR Alzheon Amazon Redshift Amazon Web Services American University of Beirut AmeriCorps Amiibo API Anaplan Apicurio Apollo.io Appalachian Regional Commission Arbor Biotechnologies Arizona State University ASAPP Atlan Authenticx AutoCAD Autodesk Autodesk Fusion Autonomous University of Barcelona Autonomous University of Madrid Azure Monitor Backstage Barchart Battle.net Bigchaindb Blizzard Entertainment Boston University Bridge British Columbia Data Catalogue Bureau of Transportation Statistics Burger Singh California Institute of Technology
Show all 423 companies ↓
CallMiner Candid Canvas Medical CaptivateIQ Castor CCH Tagetik CData Center for Parent Information and Resources Centers for Medicare and Medicaid Services Chalmers University of Technology Charles University Cisco XDR City University of Hong Kong Climate Engine Cloudera Cloudflare Cloudinary CMS Blue Button 2.0 CMS — Centers for Medicare & Medicaid Services Coconut Codesphere Collibra Comcast Complutense University of Madrid conda-forge Conductor OSS Confluence Copernicus Marine Coveo Credit Benchmark Cresilon Crunchbase Cruz Foam Crystal Reports Curtin University Dapr Daring Foods data.world Databento Databricks DataCite dbt Delinea Denbury Resources Denodo Department of Energy Devtron Didomi Dify DiscGolfAPI DTN Dynatrace Eclipse Foundation Eigenpal Elsevier EnergyX Enso Envisics EPA — U.S. Environmental Protection Agency Erasmus University Rotterdam Eridu Eurostat Factiva FAO FAOSTAT Fast Healthcare Interoperability Resources Federal Emergency Management Agency FINRA Fivetran Forest Service Forethought Frame.io Frankfurter Freddie Mac Gadjah Mada University Georgia Institute of Technology Ghent University GitHub GitLab GitLab CI/CD Glassnode Google Analytics Google Workspace Gotham Greens Gremlin Griffith University GZW Data API Habiteo Hamad Bin Khalifa University Hanyang University HappyOrNot Harbinger Hasura Hatchet Help Scout HERE Hokkaido University Hydrostor IEEE Xplore Immuta Immutable Incus Indian Institute of Science Bangalore Indian Institute of Technology Bombay Indian Institute of Technology Delhi Indian Institute of Technology Kharagpur Infinidat INRIX Inspectorio Intuit Invendor Iterable Java Jefferson Health JokeAPI Jupiter Juvenescence Kaltura Karlsruhe Institute of Technology Kateeva Keio University King Fahd University of Petroleum & Minerals KU Leuven Kubeflow Kubeflow Pipelines Kyoto University lakeFS Landing.ai Lane API Leiden University Lens Protocol Letta Lever Lexion LF AI and Data Login.gov London School of Economics and Political Science London Stock Exchange Group Lone Wolf Technologies LooksRare Loughborough University Lund University Maastricht University Mailchimp McGill University McMaster University MediaMath Memberful Metalenz Microsoft Microsoft Azure Microsoft Power Platform APIs Mlsgrid Mobula Monetate Nagoya University NASA National Archives and Records Administration National Archives and Records Administration (NARA) National Energy System Operator National University of Singapore NationGraph Netflix Conductor Netlify NHS API NHS Digital NHS England NOAA ERDDAP NOAA — National Oceanic and Atmospheric Administration Norgate Data Nusano Nutrical Solution Ltd OData Ohio State University OlympusDAO One Codex Onshape Ontraport OpenCitations OpenClinica OpenShift Optimism Oracle Oracle Database Oracle Database 19c Oracle NetSuite Oracle Siebel Orion Health Ory Outbrain Oxen Packagist ParaSwap Peking University Pendo Pendo.io Pennsylvania State University Perchwell Physna Picsart PicsArt (Socialin) Planet Labs Podchaser Pohang University of Science and Technology Pokémon TCG API Politecnico di Milano Politecnico di Torino Polkadot Polymarket Postman PowerSchool PowerShell Precisely APIs Princeton University Prometheus Prometheus Promethium PropelAuth Public Sector PubMed Purdue University Pypestream Qatar University Queen Mary University of London Queen's University Belfast Rackspace Technology Redocly Regrid Relativity RELEX Solutions Restaurant365 Revert Rice University Rippling RWTH Aachen University Salesforce Salesforce Automation Salesforce Experience Cloud Salesforce Flow Salesforce Sales Cloud SAML SAP BI Tools SAP Business Intelligence SAP BW SAP Commerce Cloud SAP HANA Sapienza University of Rome Scalable Inference Serving Seldon ServiceNow Siemens PLM Simplecast SingularityNET Skedulo SnapAPI Socket Socket Solo.io Sorbonne University Spring Framework Springer Nature SSO Stanford University Stockholm University Sun Life Tableau Tableau Desktop Taddy Taylor's University Technical University of Berlin Technical University of Darmstadt Technical University of Munich Tel Aviv University Temple Health Terrain Discovery Environment API Thanos Thanx The Bureau of Economic Analysis The Update Framework (TUF) ThoughtSpot Tickitto Toast Tohoku University Tokamak Energy Tokyo Institute of Technology Tongji University Torii Trinity College Dublin Tsinghua University TU Dresden TU Wien turbopuffer Twenty UCLouvain Unified.to United States Department of Agriculture United States National Library of Medicine Universiti Kebangsaan Malaysia Universiti Putra Malaysia Universiti Sains Malaysia Universiti Teknologi Malaysia Universiti Teknologi PETRONAS University College Dublin University of Aberdeen University of Antwerp University of Auckland University of Barcelona University of Basel University of Bern University of Bologna University of Bonn University of British Columbia University of California, Berkeley University of Cambridge University of Canterbury University of Cape Town University of Chile University of Copenhagen University of Florida University of Geneva University of Glasgow University of Gothenburg University of Göttingen University of Helsinki University of Hong Kong University of Illinois Urbana-Champaign University of Indonesia University of Leeds University of Los Andes Colombia University of Manchester University of Minnesota University of Navarra University of Nottingham University of Ottawa University of Padua University of Rochester University of Southampton University of St Andrews University of Sydney University of Texas at Austin University of Toronto University of Tübingen University of Vienna University of Waikato University of Warsaw University of Western Australia University of Wisconsin-Madison University of Zurich Unlock Protocol Uphold Uppsala University US Census Bureau Utrecht University Vanderbilt University Varian Medical Systems Vineyard Wageningen University & Research Wappalyzer Warner Bros. Discovery Waseda University Western Power Workable WorkSpan World Bank World Meteorological Organization XGS Energy YouSign Yr Yummly Zora Zype École des Ponts ParisTech École Normale Supérieure de Lyon École Normale Supérieure de Paris

Score breakdown

Frequency
80.4
log-scaled weighted occurrences
Breadth
1.9
spread across providers
Quality lift
44.3
mean composite of providers using it
Cohesion
26.9
strength of nearest seed neighbor

Related tags

OAI-PMH 136 co-occurrences University 140 co-occurrences Identity Federation 130 co-occurrences SAML 131 co-occurrences Higher Education 140 co-occurrences Open Access 112 co-occurrences Shibboleth 107 co-occurrences Research Data 107 co-occurrences

Where this tag comes from

Api tag612
Provider tag69
Openapi tag191
Openapi op tag565

Cohort brief

Auto-generated

The 67 providers in the APIs.io catalog tagged Metadata, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
67
all scored
Mean Kin Score
39.4
+15.5 vs catalog 23.9
Mean Agent Readiness
23.2
+11.2 vs catalog 12
Spread
5–62.5
median 38.9 · σ 11.9
How the 67 split by band
Exemplar 0Strong 9Developing 24Thin 27Emerging 5Minimal 2
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 43 19.8 +23.2 67
Operational Transparency 29.4 13.9 +15.5 67
Access Clarity 40.1 26.5 +13.6 67
Developer Ergonomics 35.4 23.4 +12 67
Discoverability 69.8 61.2 +8.6 67
Contract Governance 13.4 6.4 +7 67

A facet is averaged over the members that carry it, not over the whole cohort — the “Scored” column is that count. Averaging an absent facet as zero would score our own coverage gaps as the providers’ posture.

What this cohort publishes
ArtifactThis cohortCatalogDifference
MCP server (any) 10% 10% 0
MCP server (first-party) 13% 13% 0
Agent Skills 0% 0% 0
OAuth scopes 22% 11% +11
Security 97% 96% +1
Arazzo workflows 1% 2% -1
Governance rules 44% 14% +30

mcp_pct counts any mcp/ artifact including ones API Evangelist derived from the provider OpenAPI; mcp_first_party_pct counts only servers the provider publishes. Prefer the latter.

Top by Kin Score
  1. 1 Yoast 62.5
  2. 2 MediaValet 59.8
  3. 3 TVmaze 58.6
  4. 4 DataHub 57.4
  5. 5 Bynder 57.2
  6. 6 The Movie Database 56
  7. 7 Fabric Origin 55.8
  8. 8 EU Open Data Portal 55.4
  9. 9 Lakekeeper 54.6
  10. 10 Adobe Lightroom 52.8
Top by Agent Readiness
  1. 1 Fabric Origin 52.7
  2. 2 Sweep 48.5
  3. 3 Collate 43.9
  4. 4 Lakekeeper 42.6
  5. 5 Yoast 39.1
  6. 6 Bynder 37.9
  7. 7 TVU Networks 37.2
  8. 8 MediaValet 36.4
  9. 9 WorldCat 35.6
  10. 10 DataHub 35.3
All 69 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 16 September 2026, across 27514 providers, using the same computation served by the APIs.io cohort API. Briefs are published for rosters of 5 or more scored providers; below that a distribution is not meaningful.

Work with this as data

Every tag here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for tags

7 MCP tools reach this
  • find_tagsBrowse and filter every tag in the catalog.
  • get_cohortThis tag as a scored cohort — every provider carrying it, with scores.
  • cohort_statsPRO — the distribution across this tag: mean, median, band split, adoption rates.
  • cohort_rankingsPRO — the leaderboard, on composite AND agent-readiness axes.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This tag
curl "https://apis.io/api/v1/tags/metadata"
All tags
curl "https://apis.io/api/v1/tags?limit=25"
As a scored cohort
curl "https://apis.io/api/v1/cohorts/tag/metadata"
The distribution (Pro)
curl "https://apis.io/api/v1/cohorts/tag/metadata/stats" \
  -H "X-API-Key: $APIS_IO_KEY"

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