canonical · 0.3 capability resource

Metadata

Score 33.1 / 100 70 providers +357 via APIs 490 APIs Search apis.io →
Workflows using this tag
Didomi Upload and Verify a Consent Proof · Didomi Didomi Group Notices Under a Template · Didomi Didomi Submit Notice Text Content for Approval · Didomi Didomi Issue a Consent Token for an End User · Didomi Didomi Provision an Organization and Invite a Member · Didomi Didomi Deploy a Consent Notice · Didomi Didomi Record a Consent Event and Confirm Status · Didomi Didomi Classify a Vendor and Register a Cookie · Didomi
Business capabilities this tag reaches
Media Asset Management 6 SaaS Platform Operations Management 2 Compliance Management 1 Product Lifecycle Management 1 Developer Platform & API Ecosystem Management 1 Information & Data Management 1

Providers using this tag (70)

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

Strong 9 Solid coverage with minor gaps
Developing 21 Usable, with meaningful gaps to close
Thin 29 Limited public surface area
The Open Movie DatabaseEntertainmentMoviesTelevisionIMDb1 API39.2ISBNdbBooksISBNPublishing2 APIs38.5National Yang Ming Chiao Tung UniversityEducationHigher EducationUniversityTaiwan1 API38.3iconikMedia Asset ManagementMAMVideoMedia1 API37.5CoactiveCompanyArtificial IntelligenceMultimodal AIComputer Vision1 API37.0PhraseanetDigital Asset ManagementMediaOpen Source1 API36.4Michigan State UniversityEducationHigher EducationUniversityPublic Research University1 API36.2RAWGDatabaseEntertainmentGame DiscoveryGames2 APIs36.0SoundchartsMusicAnalyticsMarket Intelligence1 API35.9Indian Institute of Technology KanpurEducationHigher EducationUniversityInstitute of Technology2 APIs34.8WidenDigital Asset ManagementMediaAssets1 API34.8ACRCloudAudioMusic RecognitionAudio FingerprintingBroadcast Monitoring1 API34.6Digital Public Library of AmericaCultural HeritageLibraryArchivesMuseums1 API34.5RasgoCompanyData WarehouseAnalyticsArtificial Intelligence1 API34.4TivoEntertainmentTelevisionMovies1 API34.4Apache TikaContent ExtractionDocument ProcessingText Extraction13 APIs34.1TheGamesDBDatabaseGamingVideo Games2 APIs33.7University of LiverpoolEducationHigher EducationUniversityRussell Group14 APIs33.7Kyushu UniversityUniversityHigher EducationEducationResearch2 APIs33.5FatcatScholarlyResearchAcademicOpen Access1 API32.0Universität HamburgEducationHigher EducationUniversityGermany2 APIs32.0Apache AtlasApacheBig DataComplianceData Governance6 APIs31.2CaskCompanyBig DataData AnalyticsData Pipeline12 APIs31.2CrossrefCitationsDOIFundersIdentifiers1 API30.7SnapAPIScreenshotsPDFVideoWeb Scraping1 API29.1ACM Digital LibraryAcademicBibliographic RecordsCitationsComputing3 APIs28.4Taylor & FrancisAcademicBooksJournals4 APIs28.4University of AdelaideUniversityHigher EducationEducationAustralia5 APIs28.3Project GutenbergBooksEbooksPublic DomainLiterature1 API27.0
Emerging 7 Early or largely undocumented
Minimal 3 Almost no public developer surface
Unrated 1 Not yet scored

APIs with this tag (488)

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 34 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...91.0Dynatrace Custom Tags APIThe Dynatrace Custom Tags API allows you to manage custom tags on monitored entities within a Dynatrace env...86.3Redocly Metadata APIOperations related to metadata.82.6Didomi Metadata APIA metadata service81.0GitLab Metadata APIThe Metadata API from GitLab — 1 operation(s) for metadata.80.8Cloudflare Metadata APIRead metadata associated with keys.80.6GitHub Meta APIUse the REST API to get meta information about GitHub, including the IP addresses of GitHub services.80.3Postman Tags APIThe Tags API manages tags applied to APIs, collections, and workspaces for organization, governance reporti...79.6Mailchimp Metadata APIManage custom metadata fields that can be attached to messages for tracking and filtering.79.2Canonical Metadata APIThe Metadata API from Canonical — 1 operation(s) for metadata.76.3Microsoft Azure Metadata APIThe Metadata API from Microsoft Azure — 2 operation(s) for metadata.76.2Thanx Metadata APILook up merchants, locations, and scopes.75.4Dify Metadata APIOperations for managing knowledge base metadata fields and document metadata values. 7 operation(s) from th...75.3Outbrain Metadata APIThe Meta Data section represents the various values (Enumarations) that can be provided as part of the diff...74.3Delinea Metadata APIMetadataController73.9Adobe Campaign Metadata APIDiscover resource schemas, fields, filters, and data policies for Campaign Standard resources.72.0Netlify Metadata APIThe Metadata API from Netlify — 1 operation(s) for metadata.71.5HERE Metadata APIGet information about catalogs, layers, and partitions71.2Microsoft Power Platform Metadata APIThe Metadata API from Microsoft Power Platform — 3 operation(s) for metadata.71.1Uphold Metadata APIMetadata.70.6Oracle Siebel Metadata APIDiscovery endpoints that return OpenAPI-compatible metadata describing available resources, fields, and ope...70.4Google Analytics Metadata APIThe metadata API from Google Analytics — 1 operation(s) for metadata.70.2Confluence Content Properties APIThe Content Properties API from Confluence — 18 operation(s) for content properties.70.1Confluence Label info APIThe Label info API from Confluence — 1 operation(s) for label info.70.1Confluence User properties APIThe User properties API from Confluence — 2 operation(s) for user properties.70.1Confluence V2 Content Properties APIStore and manage custom properties on content using the Confluence Cloud REST API v2.70.1Confluence V2 Space Properties APIStore and retrieve custom properties on Confluence spaces using the v2 API.70.1Microsoft Metadata APIEntity and attribute metadata69.2Iterable Metadata APIStore and retrieve key-value metadata tables for use in personalization and campaign logic.69.1Toast Metadata APIThe Metadata API from Toast — 1 operation(s) for metadata.68.4Adobe Experience Cloud Metadata APIOperations for retrieving resource metadata68.2Wappalyzer Metadata APIThe four anonymous, unauthenticated technology and category reference endpoints on the v2 host — the techno...68.1ServiceNow CMDB Meta APIThe ServiceNow CMDB Meta API provides REST endpoints for retrieving metadata about CMDB classes, including ...67.5MediaMath Metadata API_66.5
Strong 52 Solid coverage with minor gaps
OCI Data Catalog APIREST APIs for managing a metadata catalog of data assets, enabling data discovery, governance, and understa...66.0Oracle Metadata APIThe metadata API from Oracle — 3 operation(s) for metadata.66.0Cisco XDR Metadata APIThe Metadata API from Cisco XDR — 1 operation(s) for metadata.65.6Databricks Catalogs APIThe Databricks Catalogs API is part of Unity Catalog and allows you to create, update, list, and delete cat...65.3Databricks Metastores APIThe Databricks Metastores API is part of Unity Catalog and allows you to create, update, list, and delete m...65.3Apollo.io Fields APIField and custom-field definitions across contacts, accounts and opportunities. 4 operation(s) from the pub...65.1Jefferson Health Metadata APIFHIR conformance discovery.64.9Unified.to Metadata APIThe metadata API from Unified.to — 2 operation(s) for metadata.64.9Immutable Metadata APINFT Metadata Endpoints64.4Yoast Metadata APIThe Yoast Metadata API provides a PHP interface to add, alter, or remove metadata in the of a WordPress do...64.4Yoast Surfaces APIThe Yoast Surfaces API provides a PHP interface for retrieving SEO metadata programmatically within WordPre...64.4Ontraport Metadata APIObject metadata and field information.64.2Eclipse Project Adopters APIREST API listing the organisations that have declared adoption of an Eclipse Foundation project, per projec...63.6PropelAuth Metadata APIAuthorization server metadata discovery63.2Solo.io Metadata APIInternal credential metadata endpoints63.0Backstage Metadata APIThe Metadata API from Backstage — 2 operation(s) for metadata.62.8Frame.io Metadata APIManage Metadata and related operations.62.6Canvas Medical Metadata APIFHIR server capabilities62.5mlsgrid Metadata APIOData service and EDMX metadata.62.4Landing.ai Metadata APIThe Metadata API from Landing.ai — 2 operation(s) for metadata.61.9EPA — U.S. Environmental Protection Agency Metadata APIThe Metadata API from EPA — U.S. Environmental Protection Agency — 7 operation(s) for metadata.60.7Drive Labels APICreate and manage labels to organize and classify files in Google Drive.60.5Affinda Tags APITag management for parsed documents. Tags can be arbitrarily attached to documents to support routing, segm...60.4Freddie Mac Metadata APIThe Metadata API from Freddie Mac — 3 operation(s) for metadata.60.0Autodesk Metadata APIThe Metadata API from Autodesk — 8 operation(s) for metadata.59.9GZW Data API Metadata APIThe Metadata API from GZW Data API — 4 operation(s) for metadata.59.7Onshape Metadata APIAccess and modify metadata.59.7Amazon Web Services Metadata APIThe Metadata API from Amazon Web Services — 3 operation(s) for metadata.59.6Azure Monitor Metadata APIOperations for retrieving Application Insights metadata59.2QuickBooks Custom Fields APIThe QuickBooks Custom Fields API is a premium API that provides programmatic access to custom field definit...59.2Amazon Redshift Metadata APIList databases, schemas, and tables in a Redshift data warehouse58.8Asapp3 Metadata APIAPI to submit entity's attributes to ASAPP58.8ALTR Metadata APIOperations related to the currently logged in users metadata and current organizations metadata.58.6ThoughtSpot Metadata APIThe Metadata API from ThoughtSpot — 16 operation(s) for metadata.58.4Metadata APIAPI for retrieving, deploying, creating, updating, or deleting customization information such as custom obj...58.1ASAPP Metadata APIAPI to submit entity's attributes to ASAPP57.8ParlayAPI Metadata APIThe Metadata API from ParlayAPI — 34 operation(s) for metadata.57.8DataHub CLICommand line tool for interacting with DataHub. The datahub CLI allows you to perform common operations inc...56.9DataHub GraphQL APIPrimary API for querying and mutating metadata in DataHub. The GraphQL API serves as the main public API fo...56.9DataHub Java SDKJava client for interacting with DataHub. The io.acryl datahub-client package offers REST emitter APIs that...56.9DataHub REST APIThe Rest.li API represents the underlying persistence layer and exposes the raw PDL models used in storage....56.9Fabric Origin Celebrity APIThe Celebrity API serves metadata about celebrities, including actors, directors, and other entertainment i...56.8Fabric Origin Entertainment APIThe Entertainment API ingests and serves metadata for movies, television shows, and games, including identi...56.8Origin Studio MCP ServerA hosted Model Context Protocol server over Origin Studio — metadata records, catalog operations and availa...56.8Origin Studio Production APIThe Origin Studio metadata management API — records, record lifecycles, fields, datasets, media, credits, c...56.8Temple Health Metadata APIFHIR conformance and SMART configuration discovery.56.0One Codex Metadata APIThe Metadata API from One Codex — 2 operation(s) for metadata.55.8Inspectorio METADATA APIThe METADATA API from Inspectorio — 2 operation(s) for metadata.55.7Lakekeeper Generic Table (Data) APILakekeeper's data-plane API served under /lakekeeper/v1, cataloging non-Iceberg table formats — Lance, Delt...55.3Fivetran Metadata APIThe Metadata API from Fivetran — 1 operation(s) for metadata.55.0Hatchet Metadata APIThe Metadata API from Hatchet — 3 operation(s) for metadata.54.9Barchart Metadata APIThe Metadata API from Barchart — 8 operation(s) for metadata.54.7
Developing 144 Usable, with meaningful gaps to close
Factiva DJID Taxonomy APIExplores the taxonomy of the Factiva databases using Dow Jones Intelligent Identifiers (DJID). Provides acc...54.2Immuta Metadata APIAPIs used to retrieve metadata from Immuta to enrich the marketplace54.2Authologic Metadata API5. Advanced: Metadata53.7Monetate Metadata APIRead-only API returning metadata about a Monetate account so that experience, page-event and custom-target ...53.3RELEX Solutions Metadata APIThe namespace for metadata contains the different endpoints for API metadata.53.3Skedulo Metadata APIThe Metadata API from Skedulo — 1 operation(s) for metadata.53.2Hasura Metadata APIThe Hasura Metadata API allows programmatic management of Hasura GraphQL Engine configuration. All requests...52.9Bridge Metadata APIService document and CSDL schema discovery52.8YouSign Metadata APIExtra information attached to a Signature Request.52.8Letta Metadata APIService/runtime metadata.52.4Metadata API (Experience Cloud)Deploy and retrieve Experience Cloud site configurations, navigation menus, and digital experience bundles....52.4Picsart Metadata APIThe Metadata API from Picsart — 4 operation(s) for metadata.52.4SAP BI Tools Metadata APIProvider service endpoints for retrieving OData metadata documents describing the structure of models, dime...52.2Sweep MCP ServerSweep's official hosted Model Context Protocol server — a remote SSE endpoint at https://sweepmcp.com/sse t...52.2DTN Metadata APIReturns layer metadata such as zoom levels, bounding boxes, etc.52.0US Census Bureau Metadata APIPer-dataset variables, groups, geographies, and examples51.8Coveo Metadata APIThe Metadata API from Coveo — 2 operation(s) for metadata.51.2dbt Metadata APIThe Metadata API from dbt — 1 operation(s) for metadata.51.2Tableau Metadata APIGraphQL-based API for querying metadata about Tableau content, data sources, and lineage information.50.9Gremlin Metadata APIGet metadata about the Gremlin commands.50.8Oracle Database Metadata APICollection metadata and catalog operations50.8Authenticx Metadata APIThe Metadata API from Authenticx — 2 operation(s) for metadata.50.7PicsArt (Socialin) Metadata APIThe Metadata API from PicsArt (Socialin) — 4 operation(s) for metadata.50.3Stanford Libraries PURL APIPersistent URLs into the Stanford Digital Repository. GET /{druid} returns HTML, /{druid}.xml returns the c...50.3Stanford University Metadata APIDigital Repository Objects50.3INRIX Gateway Map Version APIReports the current INRIX map and XD network version in use, so consumers can align segment identifiers wit...50.1INRIX Metadata APIThe Metadata API from INRIX — 1 operation(s) for metadata.50.1Cambridge Shibboleth Identity Provider (SAML 2.0 metadata)The University's Shibboleth identity provider, publishing signed SAML 2.0 IdP metadata at https://shib.rave...50.0CaptivateIQ Metadata APIThe Metadata API from CaptivateIQ — 1 operation(s) for metadata.49.9Crunchbase Metadata APIThe Metadata API from Crunchbase — 3 operation(s) for metadata.49.9data.world Metadata Management APICreate, search, update, and delete catalog resources by IRI. Manage tables, columns, relationships, collect...49.9Torii Metadata APIRetrieve field metadata for apps, users, and contracts.49.9WorkSpan Metadata APIThe Metadata API from WorkSpan — 6 operation(s) for metadata.49.8Login.gov Metadata APISAML 2.0 IdP metadata.49.7MINDS@UW OAI-PMH EndpointLive OAI-PMH 2.0 harvesting endpoint for MINDS@UW, UW-Madison's institutional repository. Confirmed with ?v...49.5OpenShift Metadata APIAPI for managing metadata resources including ConfigMaps, Secrets, Events, Namespaces, and ServiceAccounts.49.5DiVA OAI-PMHDiVA (Academic Archive On-line) is Uppsala University Library's institutional repository for publications a...49.4Codesphere Metadata APIThe metadata API from Codesphere — 3 operation(s) for metadata.49.3turbopuffer Namespaces APINamespace lifecycle and metadata endpoints — list namespaces, read schema / dimensions / row count, warm th...48.9Editori (journals.helsinki.fi) OAI-PMH InterfaceOAI-PMH 2.0 endpoint for Editori, the University's open publishing service (PKP Open Journal Systems). Iden...48.8Helda OAI-PMH Metadata InterfaceOAI-PMH 2.0 harvesting endpoint for Helda. Identify returns repositoryName "Helda" with an earliest datesta...48.8HY Data Catalogue OAI-PMH InterfaceOAI-PMH 2.0 endpoint for the HY Data Catalogue. Identify returns repositoryName "HyDatacatalogue", adminEma...48.8University of Helsinki Metadata APIThe Metadata API from University of Helsinki — 9 operation(s) for metadata.48.8Dane Badawcze UW OAI-PMH EndpointOAI-PMH 2.0 metadata harvesting endpoint for the University of Warsaw Research Data Repository (Dataverse)....48.6ReIn UW OAI-PMH EndpointOAI-PMH 2.0 metadata harvesting endpoint for the Institutional Repository of the University of Warsaw. verb...48.6Pendo.io Metadata APIThe Metadata API from Pendo.io — 9 operation(s) for metadata.48.4Relativity Metadata APIThe Metadata API from Relativity — 1 operation(s) for metadata.47.9AutoCAD Model Derivative APIAPI for translating AutoCAD design files into formats like SVF and SVF2 for rendering in the Viewer SDK, ex...47.8Databento Metadata APIDiscovery and cost-estimation endpoints for the historical catalog. List publishers, datasets, schemas, and...47.8Lone Wolf Technologies Metadata APIRetrieve metadata and property specifications for API resources47.8Alteryx Connect APIAPI for Alteryx Connect data catalog and collaboration platform.47.7Abacus 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...47.6DFN-AAI Identity Federation — University of Bonn Shibboleth IdPThe University of Bonn operates its own SAML 2.0 / Shibboleth Identity Provider and publishes signed metada...47.5Kaltura Metadata APIMetadata service47.4LSEG World-Check One API Info APIRetrieve information about the public API, including the current API version.47.3TU Wien Research Data OAI-PMHOAI-PMH 2.0 harvesting interface for the TU Wien Research Data repository. Verified live on 2026-08-30 with...47.1Zenodo OAI-PMH APIOpen Archives Initiative Protocol for Metadata Harvesting endpoint that allows bulk harvesting of Zenodo me...47.1Cloudinary Admin APIThe Admin API supports bulk asset management (search, retrieval, update, delete, restore), and CRUD managem...47.0Siemens PLM Metadata APIThe Metadata API from Siemens PLM — 3 operation(s) for metadata.47.0Help Scout Custom Fields APIRead custom field definitions on inboxes and read / update custom field values on conversations.46.9PURR OAI-PMH Metadata APIThe Purdue University Research Repository exposes an OAI-PMH 2.0 endpoint for harvesting research dataset m...46.8Ory Metadata APIService Metadata46.4Twenty GraphQL APIAuto-generated GraphQL API over the same workspace schema, exposing queries, mutations, batch upserts via p...46.4Taylor's e-Repository OAI-PMHOAI-PMH 2.0 data provider for the DSpace CRIS e-Repository, Identifying as repositoryName "Taylor's Univers...46.3Taylor's Library OAI-PMHOAI-PMH 2.0 data provider exposed by the Koha-powered Taylor's Library catalog for harvesting bibliographic...46.3Lund University Publications OAI-PMHOAI-PMH 2.0 metadata-harvesting endpoint for the LUP research-output repository. Identify confirms reposito...46.2Lund University Publications unAPIunAPI 1 discovery service returning the alternate metadata formats available for LUP records, which is how ...46.2LUP Student Papers OAI-PMHOAI-PMH 2.0 harvesting endpoint for the LUP Student Papers repository. Identify confirms repositoryName "Lu...46.2OpenMetadata REST APIThe OpenMetadata REST API — a JWT-authenticated (Bearer) CRUD API over every data asset and governance enti...46.1Blizzard Entertainment Metadata APIRetrieve Hearthstone metadata reference data.46.0RWTH Publications OAI-PMHRWTH Publications is the institutional repository providing access to the publication output of RWTH Aachen...45.9Select Star Metadata APIThe metadata API from Select Star — 5 operation(s) for metadata.45.9Unlock Protocol Metadata APIThe Metadata API from Unlock Protocol — 4 operation(s) for metadata.45.9OpenMetadata Metadata APIThese APIs are for managing custom property definitions in OpenMetadata. Use these APIs to create custom pr...45.7NHS England Metadata APIThe Metadata API from NHS England — 2 operation(s) for metadata.45.6Texas ScholarWorks OAI-PMH EndpointOAI-PMH 2.0 metadata-harvesting endpoint for Texas ScholarWorks. An Identify request returns repositoryName...45.3GitLab CI/CD Metadata APIOperations related to metadata of the GitLab instance45.1KU Leuven RDR OAI-PMH Harvesting InterfaceOAI-PMH 2.0 interface of the Research Data Repository, served from KU Leuven's own host. Identify returned ...45.1Lirias OAI-PMH Harvesting InterfaceLirias is the institutional publication repository of the KU Leuven Association, running on KU Leuven's own...45.1Elsevier Pure CRIS tenancy (REST + OAI-PMH)The University's tenancy of Elsevier Pure, its Current Research Information System, reached at pure.manches...45.0Restaurant365 Metadata APIOData service metadata44.9SAP HANA REST Info APIREST API for retrieving system information and metadata about SAP HANA Platform instances.44.8CMS — Centers for Medicare & Medicaid Services Metadata APIThe Metadata API from CMS — Centers for Medicare & Medicaid Services — 2 operation(s) for metadata.44.5Spring Framework Metadata APIDiscover available project options and capabilities44.4OSTI ELINK APIThe OSTI ELINK API is the Office of Scientific and Technical Information's submission and retrieval interfa...44.3Utrecht University Repository OAI-PMHOAI-PMH 2.0 metadata harvesting interface for the Utrecht University Library institutional repository. Veri...44.3Polymarket Gamma APIRead-only metadata API for markets, events, tags, and categories - the surface that powers polymarket.com's...44.2HKU Scholars Hub OAI-PMHHKU Scholars Hub is the University's DSpace-based open-access institutional repository and current research...44.0SAP Commerce Cloud Metadata APIOData service metadata44.0Socket Metadata APIThe metadata API from Socket — 5 operation(s) for metadata.43.6Packagist Metadata APIComposer v2 static metadata and change tracking.43.5NationGraph Metadata APIThe Metadata API from NationGraph — 1 operation(s) for metadata.43.4ResearchSpace OAI-PMH 2.0 ServiceLive OAI-PMH 2.0 metadata harvesting endpoint for ResearchSpace, the University's self-hosted DSpace instit...43.3University 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...43.3Credit Benchmark Metadata APIMetadata discovery endpoints.43.2HappyOrNot Metadata APIMetadata related endpoints and daa definitions43.1IDEALS OAI-PMHThe OAI-PMH 2.0 data provider for IDEALS, the Illinois Digital Environment for Access to Learning and Schol...42.9IRIS PoliTO OAI-PMH Metadata Service (CINECA deployment)OAI-PMH 2.0 harvesting service over IRIS, Politecnico di Torino's institutional research repository, reacha...42.8MacSphere Institutional RepositoryMcMaster University Libraries' institutional repository of theses, dissertations and open-access research o...42.8Politecnico di Torino Shibboleth Identity Provider (IDEM GARR / eduGAIN)Machine-readable SAML 2.0 identity-provider metadata for Politecnico di Torino, served from the university'...42.8Forethought Metadata APIInspect workspace-level Solve configuration.42.7InCommon Federation registrationRice's identity provider is registered in InCommon, the US research and education identity federation, and ...42.7Rice Research Repository (DSpaceDirect tenancy) — OAI-PMHOAI-PMH 2.0 harvesting endpoint for the Rice Research Repository. Identify returns repositoryName "Rice Res...42.7DSpace Institutional Repository (Central Library)The IIT Bombay Central Library institutional repository, running DSpace over theses, journal articles and c...42.5Sun Life Metadata APIThe Metadata API from Sun Life — 1 operation(s) for metadata.42.4GT Digital Repository OAI-PMHPublic OAI-PMH 2.0 metadata harvesting interface for the Georgia Tech Digital Repository, the institutional...42.3GT Digital Repository REST APIDSpace 7.6 REST API for the Georgia Tech Digital Repository, providing programmatic read access to communit...42.3Enso Metadata APIThe metadata API from Enso — 8 operation(s) for metadata.42.2Superchain RegistrySource-of-truth index of chains that are part of the Optimism Superchain — genesis files, deployment addres...42.2Pypestream Metadata APIThe Metadata API from Pypestream — 2 operation(s) for metadata.42.1Regrid Metadata APICoverage, usage, and data quality endpoints42.1Salesforce Tooling API (Flow)Tooling API endpoints for managing Flow definitions and metadata. Supports deployment, retrieval, and manag...42.1Bureau of Transportation Statistics Metadata APIDataset and view metadata42.0Catalogo Coletivo ULisboa (Koha) — OAI-PMHOAI-PMH 2.0 interface over the union library catalog of the 18 schools, the National Museum of Natural Hist...42.0Elmi Research Portal — OAI-PMHHBKU's research information system, Elmi, runs Elsevier Pure on the university's own subdomain and exposes ...42.0Repositorio da Universidade de Lisboa — OAI-PMHOAI-PMH 2.0 metadata harvesting interface over the DSpace 7.6.1 institutional open-access repository. Opera...42.0Universidade 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...42.0Autodesk Fusion Metadata APIThe Metadata API from Autodesk Fusion — 4 operation(s) for metadata.41.8CMR Ingest APIREST API for creating, updating, and deleting metadata records in the Common Metadata Repository. Supports ...41.8Incus Metadata APIThe Metadata API from Incus — 1 operation(s) for metadata.41.7IEEE Xplore DOI APIBatch metadata lookup endpoint that accepts up to 25 DOI (Digital Object Identifier) numbers per request an...41.4IEEE Xplore Metadata Search APIREST endpoint for querying and retrieving metadata records and abstracts for more than 6 million documents ...41.4SAP Business Intelligence Metadata APIBrowse BW/4HANA metadata catalog41.2Centene Metadata APIThe metadata API from Centene — 1 operation(s) for metadata.41.0McGill University Metadata APISAML 2.0 entity metadata published for relying parties and federations.41.0Devtron Metadata APIApplication metadata and information retrieval40.4NOAA InPort Metadata CatalogInPort is the authoritative metadata repository for NOAA Fisheries and the National Ocean Service and the N...40.4DiscGolfAPI Metadata APIDataset manifest and publication metadata.40.2CMS Blue Button 2.0 Metadata APIFHIR capability statement.40.1LooksRare Collections APIRetrieve collection-level data for NFT collections indexed on LooksRare. Endpoints return Collection object...40.1LooksRare Tokens APIRetrieve NFT token metadata including token details, collection information, and token attributes for any t...40.1Dapr Metadata APISidecar metadata operations.40.0Eigenpal Metadata APIAuthenticate and inspect the current API context.39.9PHAIDRA OAI-PMH EndpointOAI-PMH 2.0 metadata harvesting interface for PHAIDRA, the University of Vienna's own institutional reposit...39.9PKU Open Research Data Platform (OAI-PMH)OAI-PMH 2.0 metadata-harvesting endpoint for the Open Research Data Platform, verified responding to the Id...39.9AmeriCorps Metadata APIRetrieve dataset metadata and schema information.39.7Health Research Data Catalogue APIRetrieve metadata about NHS health datasets suitable for publication in health research catalogues. Enables...39.7mediaTUM OAI-PMH Repository InterfaceOAI-PMH 2.0 harvesting interface over TUM's institutional repository. Verified verbs Identify, ListMetadata...39.7NHS Digital Metadata APIThe Metadata API from NHS Digital — 2 operation(s) for metadata.39.7Physna Metadata APIThe Metadata API from Physna — 6 operation(s) for metadata.39.7Rackspace Technology Metadata APIResource-level customer metadata.39.7SnapAPI Metadata APIThe Metadata API from SnapAPI — 1 operation(s) for metadata.39.6Scalable Inference Serving Metadata APIServer and model metadata endpoints39.5Orion Health Metadata APIServer capability and metadata operations39.4
Thin 195 Limited public surface area
PowerSchool Metadata APISystem metadata and configuration39.2PUL Bibliographic Data Web Service (Bibdata)Princeton University Library's own bibliographic data service at bibdata.princeton.edu. A Rails application...39.1Tableau Metadata APIDiscover and query metadata about Tableau content using GraphQL, including workbooks, data sources, flows, ...39.1CCH Tagetik Metadata APIThe Metadata API from CCH Tagetik — 1 operation(s) for metadata.39.0CU Digital Repository OAI-PMHThe Charles University Digital Repository (Digitalni repozitar UK), a DSpace instance running on university...39.0CU Research Publications Repository OAI-PMHThe Charles University Research Publications Repository (Repozitar publikacni cinnosti UK), a DSpace instan...39.0KURENAI OAI-PMH APIOAI-PMH 2.0 metadata harvesting interface for KURENAI, the Kyoto University Research Information Repository...39.0Mobula Metadata APIAsset and token metadata.39.0PowerShell Metadata APIOData service metadata.39.0Yr Metadata APIService metadata endpoints39.0KITopen OAI-PMH InterfaceKITopen is KIT's central open-access institutional repository for the bibliographic data, full texts, image...38.6Kubeflow Pipelines Metadata APIAPI for tracking and managing metadata about ML artifacts, executions, and lineage information throughout t...38.3NYCU Dataverse OAI-PMH EndpointAnonymous OAI-PMH 2.0 metadata-harvesting endpoint over the NYCU Dataverse research-data repository ("NYCU ...38.3NYCU 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...38.3NYCU 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...38.3Chalmers Open Digital Repository (ODR) OAI-PMHOAI-PMH 2.0 metadata harvesting interface for the Chalmers Open Digital Repository (ODR), which holds stude...38.1Chalmers 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...38.1Chalmers Research OAI-PMHOAI-PMH 2.0 metadata harvesting interface for the Chalmers Research portal (research.chalmers.se), covering...38.1Acuant Metadata APISupported document types, subscriptions, logs38.0DataCite GraphQL APIAn alternative query interface for DOI metadata retrieval using the GraphQL query language. Currently suppo...38.0DepositOnce OAI-PMH InterfaceOpen Archives Initiative Protocol for Metadata Harvesting (OAI-PMH 2.0) endpoint for DepositOnce, TU Berlin...38.0SAP BW BAPI/RFC APIBusiness Application Programming Interfaces (BAPIs) and Remote Function Call (RFC) interfaces for SAP BW pr...38.0Springer Nature Metadata APIThe legacy Metadata API provides metadata retrieval for Springer publications. Returns article and book met...37.8Tsinghua University Identity Provider — SAML 2.0 Federation MetadataTsinghua operates its own Shibboleth Identity Provider and publishes machine-readable SAML 2.0 metadata abo...37.7Seldon Metadata APIThe metadata API from Seldon — 3 operation(s) for metadata.37.6iconik Metadata APICustom metadata fields, views, and values.37.5Castor Metadata APIReference metadata such as countries.37.4Invendor Metadata APIThe Metadata API from Invendor — 1 operation(s) for metadata.37.3Elsevier Pure CRIS tenancyThe University's tenancy of Elsevier Pure, its Current Research Information System, at pure.soton.ac.uk. Pu...37.2Frankfurter Metadata APIAPI reference data like available currencies37.2OpenUCT Institutional Repository OAI-PMHOpenUCT is the University of Cape Town's open access institutional repository, running DSpace 7.4 on UCT's ...37.2Planet Catalog APISTAC-based search and access layer over Planet imagery metadata, providing a standards-aligned interface to...36.9Lever Tags APIList and apply tags to opportunities for cohorting, sourcing, and reporting workflows.36.8United States National Library of Medicine Metadata APIAPI metadata and field definitions36.8Atlan GraphQL APIGraphQL interface for querying Atlan's knowledge graph, enabling flexible traversal of metadata relationshi...36.7Oxen Metadata APIThe Metadata API from Oxen — 1 operation(s) for metadata.36.7Pokémon TCG API Metadata APIThe controlled vocabularies used across cards - energy types, card subtypes, supertypes, and rarities.36.6The Bureau of Economic Analysis Metadata APIMethods for discovering available datasets, parameters, and valid values.36.6Phraseanet Metadata APIRecord captions, metadata values, and status flags.36.4Eurostat Catalogue APIAPI for discovering all publicly available Eurostat datasets, browsing the navigation tree, and retrieving ...36.2MSU Libraries Catalog OAI-PMHOAI-PMH 2.0 metadata harvesting provider over the MSU Libraries catalog, on the university's own host. Veri...36.2MSU 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...36.2Tickitto Metadata APIThe Metadata API from Tickitto — 1 operation(s) for metadata.36.1Workable Custom Attributes APIThe Custom Attributes API from Workable — 2 operation(s) for custom attributes.35.9FDAT Repository OAI-PMHOAI-PMH 2.0 metadata harvesting provider for the FDAT research data repository. Verified live 2026-09-01 — ...35.7FINRA Metadata APIThe Metadata API from FINRA — 1 operation(s) for metadata.35.7United States Department of Agriculture Metadata APIAvailable years, states, reports, and variables35.2OSCAR/Surface REST APIThe OSCAR/Surface REST API provides programmatic access to the WMO Observing Systems Capability Analysis an...34.9IIT Kanpur PKK Library OAI-PMH APIOAI-PMH 2.0 metadata-harvesting endpoint for the P.K. Kelkar Library catalog, operated on the institution's...34.8IIT Kanpur ROR Registry RecordIIT Kanpur's registration in the Research Organization Registry (ROR), identifier https://ror.org/05pjsgx75...34.8Prometheus Metadata APIRetrieve metric metadata such as type and unit.34.8Science 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...34.8Widen Metadata APIManage metadata fields and controlled vocabulary values.34.8ePrints@IISc OAI-PMHePrints@IISc is the open-access institutional repository of IISc research publications, established in 2002...34.7ETD@IISc DSpace 6 REST APIRead-only REST API of ETD@IISc, the Electronic Theses and Dissertations repository IISc runs on DSpace 6 at...34.7Journal 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...34.7ACRCloud Metadata APILook up enriched third-party music metadata.34.6Perchwell Metadata APIOData service metadata.34.6Forest Service Research Data Archive Web ServiceSearch and retrieve DOI-registered Forest Service research data publications. Four REST endpoints — /search...34.5U.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...34.5Polkadot Metadata APIThe Metadata API from Polkadot — 1 operation(s) for metadata.34.4Rasgo Metadata APITable metadata operations34.4TiVo Music Metadata APIThe TiVo Music Metadata API provides access to high-quality music information including artist details, alb...34.4Apache Tika Java APIThe Tika Java API provides the AutoDetectParser for automatic format detection and parsing, Metadata class ...34.1Coconut Metadata APIRetrieve technical metadata for input and output files.33.9Simplecast Metadata APIAccount, categories, keywords, authors, and helper resources.33.9Warner Bros. Discovery Metadata APIContent metadata and manifest submission33.8DataCat Research Data Catalogue OAI-PMHOAI-PMH 2.0 metadata-harvesting interface for DataCat, the University of Liverpool research data catalogue ...33.7Infinidat Metadata APIThe metadata API from Infinidat — 2 operation(s) for metadata.33.7NHS API Metadata APIThe Metadata API from NHS API — 1 operation(s) for metadata.33.7Repositorio Institucional Seneca - OAI-PMHOAI-PMH metadata harvesting interface for "Seneca", the DSpace 7 institutional repository that collects the...33.7University of Liverpool Repository EPrints RESTKeyless, read-only EPrints REST interface on the institutional repository. Verified live 2026-09-01: GET /r...33.7University of Liverpool Repository OAI-PMHOAI-PMH 2.0 metadata-harvesting interface for the University of Liverpool Repository, an EPrints 3.4.5 open...33.7Varian Medical Systems Metadata APIFHIR server capability and metadata33.7NASA Metadata APIThe Metadata API from NASA — 1 operation(s) for metadata.33.5QIR / Kyushu University Collections Bulk Metadata (TSV via Handle)Quarterly full-metadata TSV exports for the Kyushu University Library digital collections, distributed thro...33.5Comcast Open Ingest APIThe Comcast Open Ingest endpoint accepts metadata and content asset packages from NBCUniversal media partne...33.3NAGOYA Repository OAI-PMH (NII WEKO3 / JAIRO Cloud tenant)OAI-PMH 2.0 metadata harvesting interface for the NAGOYA Repository, Nagoya University's institutional repo...33.3ROR registration — Nagoya UniversityNagoya University is registered in the Research Organization Registry as ROR ID https://ror.org/04chrp450, ...33.3Revert Metadata APIEnvironment / app configuration for the connect UI.33.1UC 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...33.0Kubeflow Metadata APIAPI for tracking and managing metadata, artifacts, and lineage for ML workflows running on Kubeflow.32.9Conductor OSS Metadata APIThe Metadata API from Conductor OSS — 4 operation(s) for metadata.32.6OPARA OAI-PMH Harvesting InterfaceThe standards-based harvesting interface for OPARA — how TU Dresden's research data reaches OpenAIRE, BASE,...32.6Denodo Data Catalog REST APIThe Denodo Data Catalog REST API provides programmatic access to the catalog of virtual views, web services...32.5Rippling Custom Fields APIDefine and read custom fields attached to employees, departments, and other Rippling resources for tenant-s...32.5Terrain Discovery Environment API Metadata APIFile and data metadata annotation32.5Vanderbilt University Metadata APIControlled vocabularies used to filter the archive.32.4Apicurio Metadata APIThe Metadata API from Apicurio — 2 operation(s) for metadata.32.3Bigchaindb Metadata APIFull-text search over transaction metadata.32.2LSE Digital Library (Quartex — IIIF / OAI-PMH)The LSE Digital Library publishes digitised and born-digital material from LSE Library collections. The hos...32.1LSE Research Online (EPrints, OAI-PMH)LSE Research Online is LSE's institutional repository — LSE's research outputs, LSE's metadata, LSE's regis...32.1DFN-AAI / eduGAIN Federation MembershipUniversität Hamburg's IdP is registered in DFN-AAI, the German national identity federation and eduGAIN mem...32.0Digitized Collections (Kitodo.Presentation) OAI-PMHOAI-PMH 2.0 interface over the digitized collections of the Staats- und Universitätsbibliothek Hamburg, run...32.0E-Dissertationen (ediss.sub.hamburg) OAI-PMHOAI-PMH 2.0 metadata-harvesting interface for the DSpace-based institutional repository of electronic disse...32.0Hamburg University Press OAI-PMHOAI-PMH 2.0 interface of Hamburg University Press, the open-access publishing house of the Staats- und Univ...32.0HUP Journal Server OAI-PMHOAI-PMH 2.0 interface of the journal server of Hamburg University Press. Verified live 2026-09-01: reposito...32.0Open-Access-Portal Universität HamburgOpen Access discovery portal aggregating freely available publications, research data, teaching materials a...32.0Universität 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...32.0ZFDM Repository OAI-PMHOAI-PMH 2.0 harvesting interface of the ZFDM Research Data Repository. Verified live 2026-09-01: repository...32.0Archive ouverte UNIGE OAI-PMHOAI-PMH 2.0 metadata-harvesting interface for the Archive ouverte UNIGE institutional repository, exposing ...31.9Yareta OAI-PMH Provider APIThe OAI-PMH provider-information surface of the Yareta access module — sets, metadata formats and provider ...31.9Candid Taxonomy APIReturns Candid's philanthropic classification system (subject, population, support-strategy, and geographic...31.7TSpace Institutional Repository (OAI-PMH) — tenant on ScholarisOAI-PMH 2.0 harvesting endpoint for TSpace, the University of Toronto Libraries institutional research repo...31.5UTORauth Shibboleth Identity Provider (SAML 2.0 metadata)The University of Toronto's Shibboleth identity provider, entityID https://idpz.utorauth.utoronto.ca/shibbo...31.5edoc OAI-PMHOAI-PMH 2.0 metadata harvesting interface for edoc. Identify reports repositoryName "edoc: Open Access Repo...31.4Zora NFT GraphQL APIGraphQL API for querying NFT metadata, on-chain sales, mint events, collection attributes, and market stati...31.4Curtin Research Data in Research Data Australia (ARDC)Curtin contributes research data collection records to Research Data Australia, the national registry run b...31.3Jupiter Tokens APISearch Solana tokens by mint, symbol, or name; fetch metadata, verification status, tags, and trading metri...31.3CDAP Metadata MicroservicesSearch, annotate, and retrieve business and technical metadata and lineage for CDAP entities such as applic...31.2SingularityNET Marketplace APIThe SingularityNET AI Marketplace REST API provides service discovery, organization management, and metadat...31.1Waikato SAML 2.0 Identity Provider in TuakiriThe University of Waikato's Shibboleth Identity Provider, entityID https://idp.waikato.ac.nz/idp/shibboleth...31.1Glassnode Metadata APIThe Metadata API from Glassnode — 3 operation(s) for metadata.31.0JokeAPI Metadata APIOperations describing the API surface — categories, flags, formats, languages.31.0ParaSwap Tokens APIRetrieves the curated list of tokens supported across all ParaSwap-integrated networks. Returns token metad...31.0Thanos Metadata APIThe Metadata API from Thanos — 3 operation(s) for metadata.30.8World Bank Data Catalog APIProvides information about thousands of development-relevant datasets available through the World Bank Data...30.7Western Power Metadata APIThe Metadata API from Western Power — 2 operation(s) for metadata.30.6Climate Engine Metadata APIDataset dates, variables, county names, and raster classifications.30.4HAL — ENPC Open-Access Collection (tenant)ENPC's institutional open-access repository is the ENPC collection inside HAL, the French national open arc...30.3L'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...30.3Promethium APIREST API for Promethium's agentic data platform — tenant-scoped OAuth2 authentication, datamap search and c...30.3Universiti Kebangsaan Malaysia Metadata APISAML 2.0 metadata publication.30.3Leiden University SAML 2.0 Identity Provider MetadataLeiden University's own SAML 2.0 identity-provider metadata document, authored and XML-DSig signed by Leide...30.2Nutrical Solution Ltd Metadata APIPublic nutrient and allergen reference data.30.2Scholarly Publications OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for Leiden University Scholarly Publications, the Islandora-based ...30.2PMC OAI-PMH APIThe PMC OAI-PMH (Open Archives Initiative Protocol for Metadata Harvesting) API enables systematic harvesti...30.1DFN-AAI federation membership (eduGAIN)TU Darmstadt's identity provider is published in DFN-AAI, the German research-and-education identity federa...30.0TU Darmstadt Shibboleth Identity Provider (SAML 2.0 metadata)The university's own SAML 2.0 identity provider, operated by the Hochschulrechenzentrum (HRZ). Verified liv...30.0TUbiblio OAI-PMH (EPrints)TUbiblio is the publication bibliography of TU Darmstadt, on the institution's own host (tubiblio18.ulb.tu-...30.0TUdatalib OAI-PMHOAI-PMH 2.0 metadata harvesting interface for TUdatalib. Verified live 2026-09-01: Identify returns reposit...30.0tuprints OAI-PMH (EPrints)tuprints is the open-access publication repository of TU Darmstadt, on the institution's own host and regis...30.0Repository@Nottingham DSpace REST APIKeyless, read-only HAL+JSON REST API of the university's self-hosted DSpace 8.2 / DSpace-CRIS (cris-2024.02...29.9Anaplan Financial Consolidation APIControls workflows, manages security, and supports retrieval, insertion, update, and deletion of financial ...29.7Vineyard Metadata APIInspect and manage object metadata29.7Caltech Library FeedsA metadata service built and operated by Caltech Library (v1.6), harvesting its institutional repositories,...29.6CaltechDATA OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for CaltechDATA. Verified live 2026-08-19 via the Identify verb (r...29.6Taddy Episode Chapters APIFetch chapter markers for an episode via getEpisodeChapters and the chapters field, returning chapter title...29.6Taddy iTunes Info APIResolve Apple Podcasts / iTunes metadata for a podcast with getItunesInfo and the itunesInfo field, includi...29.6Taddy Podcast Series & Episodes APILook up podcast series and episodes via getPodcastSeries, getPodcastEpisode, getMultiplePodcastSeries, getM...29.6DIAL.mem OAI-PMHOAI-PMH 2.0 harvesting endpoint for DIAL.mem, UCLouvain's master's-thesis repository. Identify returns repo...29.5DIAL.pr OAI-PMHOAI-PMH 2.0 harvesting endpoint for DIAL.pr, UCLouvain's research-publications repository. Identify returns...29.5OER-UCLouvain OAI-PMHOER-UCLouvain is the institution's open educational resources repository, running DSpace JSPUI on oer.uclou...29.5Open Data @ UCLouvain Dataverse OAI-PMHOAI-PMH 2.0 metadata-harvesting endpoint for the UCLouvain research-data repository. Identify returns repos...29.5Waseda 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...29.5Waseda University Repository (OAI-PMH)OAI-PMH 2.0 metadata harvesting for the Waseda University Repository. The collection, the administrative co...29.5Amiibo API Metadata APIAPI metadata endpoints29.4OpenClinica Metadata APIRead ODM study design metadata.29.4Enlighten Publications OAI-PMHOAI-PMH 2.0 metadata harvesting over Enlighten, the University of Glasgow's EPrints institutional repositor...29.3Enlighten Research Data OAI-PMHOAI-PMH 2.0 metadata harvesting over Enlighten Research Data, the University of Glasgow's research data rep...29.3Enlighten Theses OAI-PMHOAI-PMH 2.0 metadata harvesting over Enlighten Theses, the University of Glasgow's electronic theses reposi...29.3IFMuC — 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...29.3Traces — 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...29.3Anaconda.org Package APIREST API hosted on api.anaconda.org that provides read access to conda-forge package metadata including pac...29.2conda-forge Channel Repodata APIStatic JSON index files served over HTTPS from conda.anaconda.org for each supported platform subdirectory ...29.2TARA 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...29.2IRIS Research Catalogue OAI-PMHOAI-PMH 2.0 metadata-harvesting provider for IRIS, Sapienza's institutional research information system and...29.1FAO FAOSTAT Metadata APIOperations for retrieving dataset and indicator metadata29.0NOAA ERDDAP Metadata APIInspect variable and attribute metadata for a specific dataset.29.0InCommon Federation registration (urn:mace:incommon:asu.edu)ASU's registration in the InCommon Federation, retrievable as signed SAML metadata from the InCommon MDQ se...28.71inch Token APIToken metadata and discovery endpoints.28.4ACM Digital Library Citation Export APIThe ACM Digital Library provides citation export functionality supporting BibTeX, EndNote, and ACM Referenc...28.4ACM Digital Library Content Retrieval APIIndividual publications, conference papers, and journal articles in the ACM Digital Library are accessible ...28.4ACM Digital Library Search APIThe ACM Digital Library search endpoint allows programmatic querying of computing literature across ACM's f...28.4Battle.net Metadata APIHearthstone metadata including sets, classes, types, and keywords28.3University of Rochester Shibboleth Identity ProviderSAML 2.0 / Shibboleth identity provider metadata for the University of Rochester, published machine-readabl...28.2Sydney eScholarship Repository (institutional repository, OAI-PMH)Sydney eScholarship is the university's own institutional repository, running on the university-owned usyd....28.0ScholarBank@NUS DSpace REST APIThe HAL-style REST API of ScholarBank@NUS, the university's institutional repository — communities, collect...27.9ScholarBank@NUS OAI-PMH InterfaceOAI-PMH 2.0 metadata harvesting endpoint for ScholarBank@NUS, advertising twelve metadata formats including...27.9HAL Search API — SORBONNE-UNIVERSITE collectionThe HAL Solr search API scoped to Sorbonne University's collection at https://api.archives-ouvertes.fr/sear...27.7HAL 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-...27.7St Andrews Research Portal (Elsevier Pure tenancy)research-portal.st-andrews.ac.uk is the University's research information system and public research portal...27.7St Andrews Research Repository OAI-PMHOAI-PMH 2.0 endpoint for the DSpace-based St Andrews Research Repository, the University's open-access repo...27.7ZORA Repository OAI-PMHThe Zurich Open Repository and Archive (ZORA) is UZH's institutional repository for the peer-reviewed resea...27.2BORIS Portal OAI-PMH EndpointOAI-PMH 2.0 metadata-harvesting endpoint for BORIS Portal, the University of Bern's institutional repositor...27.1OpenBU Repository — OAI-PMH and DSpace REST (Atmire-operated)OpenBU is Boston University Libraries' open-access institutional repository. The content, the collections a...27.11inch NFT APIWallet NFT holdings, collection metadata, and floor prices across supported chains.27.01inch Token APIToken metadata, lists, search, and verification across all 1inch-supported networks.27.0Docta Complutense OAI-PMH EndpointOAI-PMH 2.0 harvesting endpoint for Docta Complutense, on UCM's own host. Probed 2026-08-30: verb=Identify ...27.0Gutendex APIGutendex is a JSON web API for Project Gutenberg ebook metadata. It provides access to the catalog of 75,00...27.0UniversiDATA CKAN Dataset APICKAN-compatible metadata API of the UniversiDATA consortium platform, supporting current_package_list_with_...27.0UniversiDATA DCAT Catalog APIDCAT catalogue endpoint of UniversiDATA, addressed per participating university by acronym. The UCM catalog...27.0National Archives and Records Administration (NARA) Metadata APIThe Metadata API from National Archives and Records Administration (NARA) — 1 operation(s) for metadata.26.9National Archives and Records Administration Metadata APIThe Metadata API from National Archives and Records Administration — 1 operation(s) for metadata.26.9IRIS UNIPD OAI-PMHOAI-PMH 2.0 harvesting endpoint for IRIS UNIPD, the University of Padua's institutional research catalogue ...26.7InCommon Federation IdP MetadataOhio State's SAML 2.0 Identity Provider as published in the InCommon Federation metadata aggregate, retriev...26.6Knowledge Bank OAI-PMH InterfaceOAI-PMH 2.0 metadata harvesting endpoint for the Knowledge Bank institutional repository, supporting the st...26.6TUF Repository SpecificationThe TUF specification defines the structure of update repositories including the root, targets, snapshot, a...26.6Aarhus University OAI-PMH Metadata ServiceOpen Archives Initiative Protocol for Metadata Harvesting 2.0 service for Aarhus University's research reco...26.5Queen 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 ...26.5OData $Metadata APIThe $Metadata API from OData — 1 operation(s) for $metadata.26.3OData Service APIStandard OData service endpoints including service document, metadata document, entity set CRUD operations,...26.3UTM Institutional Repository (UTM-IR) EPrints OAI-PMH — unreachableThe older EPrints institutional repository, registered with ROAR (record 1358), OpenDOAR and Sherpa (record...26.3HAL 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...26.2RENATER 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,...26.2
Emerging 62 Early or largely undocumented
Crystal Reports Metadata APIReport structure and metadata26.0CallMiner Eureka Ingestion APIAsynchronously add or update media and metadata for audio and text-based contacts in a CallMiner Eureka ten...25.8OpenCitations Metadata APIOperations for retrieving bibliographic metadata25.8Otago Scholarly Identifier Registrations (DataCite + Crossref)Otago's persistent-identifier registrations, readable through each registry's public REST API. Confirmed li...25.8OUR Archive OAI-PMH Metadata — Ex Libris Esploro tenancyOUR Archive (Otago University Research Archive) is the University's institutional research repository. The ...25.8AUB ScholarWorks OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for AUB ScholarWorks. Identify returns repositoryName "AUB Scholar...25.7Loughborough University Research Repository (figshare tenancy)The Loughborough Research Repository is the university's institutional repository for all research outputs,...25.4TAU Libraries Alma OAI-PMH Metadata HarvestingOpen Archives Initiative Protocol for Metadata Harvesting 2.0 service for the Tel Aviv University library r...25.2AURA 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...25.0Elsevier Pure CRIS tenancy (research portal, REST + OAI-PMH)The University's tenancy of Elsevier Pure, its current research information system, published as "The Unive...25.0SimpleHash NFT & Token APIMulti-chain REST API providing NFT metadata, ownership, transfers, floor prices, listings, bids, spam score...25.0AMS Acta Institutional Repository OAI-PMHOAI-PMH 2.0 metadata-harvesting provider for AMS Acta, the AlmaDL institutional research repository, self-h...24.7Copernicus Marine CSW Catalogue APIThe Copernicus Marine Catalogue Service for the Web (CSW) provides OGC-compliant metadata discovery over th...24.7IRIS Research Information System (CINECA tenancy)IRIS is the university's current research information system and publication catalogue, reachable at cris.u...24.7IIT Delhi Institutional Repository OAI-PMHOAI-PMH 2.0 metadata-harvesting interface for the IIT Delhi DSpace 8 institutional repository, on the insti...24.6TOUR Institutional Repository OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for TOUR (TOhoku University Repository). The collection, the depar...24.6Griffith Research Online (GRO) DSpace REST APIREST API for Griffith Research Online, the university's institutional repository, running DSpace 7.6. Serve...24.4Griffith Research Online OAI-PMHOAI-PMH 2.0 metadata harvesting endpoint for Griffith Research Online. The Identify response returns reposi...24.4Biblos-e Archivo OAI-PMH EndpointOAI-PMH 2.0 metadata-harvesting endpoint for Biblos-e Archivo. Identify returns repositoryName "Biblos-e Ar...24.1Portal 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...24.1EgeriaEgeria is the world's first open source metadata standard for enterprise data management, enabling unified ...23.7MarquezMarquez is an open source metadata service for the collection, aggregation, and visualization of a data eco...23.7OpenLineageOpenLineage is an open standard and API for collecting lineage metadata across data pipelines.23.7lakeFS Metadata APIThe metadata API from lakeFS — 2 operation(s) for metadata.23.6AI Catalog ManifestThe publishing half of the standard — the JSON manifest a domain serves at /.well-known/ai-catalog.json dec...23.5OlympusDAO Metadata APIDate bounds and indexer metadata.23.4DADUN Institutional Repository (OAI-PMH)DADUN (Deposito Academico Digital de la Universidad de Navarra) is the university's open-access institution...23.1Crossref Member 4386 (Universitas Indonesia)University of Indonesia is a Crossref member and DOI registrant. Verified against the Crossref REST API: ht...22.6Dipòsit Digital OAI-PMHOAI-PMH metadata-harvesting endpoint for the Dipòsit Digital de la Universitat de Barcelona, used for harve...22.6Revistes 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...22.6UI Research Portal (Elsevier Pure tenant)scholar.ui.ac.id is University of Indonesia's Elsevier Pure Portal — HTTP response header x-product "Pure P...22.6UI 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...22.6Lexion Contract RepositoryCentralized intelligent repository for agreements, surfacing contracts, parties, key dates, and metadata. L...22.5Research Portal (Elsevier Pure) OAI-PMH — Bath tenancyOAI-PMH 2.0 harvesting interface served by the University's Elsevier Pure tenancy, advertising the OpenAIRE...22.5Research Portal (Elsevier Pure) Web Service — Bath tenancyThe University's Elsevier Pure research information system exposes the Pure Web Service under a Bath hostna...22.5UC Research Repository DSpace REST APIDSpace 7 REST API backing the UC Research Repository, providing programmatic access to communities, collect...22.4UC Research Repository OAI-PMHOAI-PMH 2.0 metadata harvesting interface for the UC Research Repository, a self-hosted DSpace 7 institutio...22.4UC Shibboleth SAML 2.0 Service Provider MetadataThree Shibboleth Service Providers run on University of Canterbury hosts and publish machine-readable SAML ...22.4data.gov (CKAN catalog)The U.S. federal open data catalog at catalog.data.gov, powered by the open-source CKAN platform. The CKAN ...22.2ENS-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 ...22.2Repositorio Académico DSpace REST APIThe DSpace 6 REST API on the University of Chile institutional repository, not catalogued before this run. ...22.1Repositorio Académico OAI-PMHOAI-PMH 2.0 provider on the University of Chile institutional repository (Repositorio Académico), managed b...22.1UChile Research Data Repository OAI-PMHOAI-PMH 2.0 provider on the University of Chile Dataverse installation. Confirmed live on 2026-09-01: ?verb...22.1DiVA Institutional Repository (OAI-PMH)Stockholm University's publication records are harvestable over OAI-PMH 2.0 from its DiVA instance at su.di...21.7GakuNin 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...21.5Netflix Conductor Metadata APIThe Metadata API from Netflix Conductor — 4 operation(s) for metadata.21.4Artashippinginc Metadata APIThe metadata API from Artashippinginc — 24 operation(s) for metadata.21.1Queen's University Belfast Research Portal — OAI-PMH harvesting endpointLive OAI-PMH 2.0 metadata harvesting endpoint for the QUB Research Portal. Identify returns repositoryName ...20.5Fast Healthcare Interoperability Resources Metadata APIThe Metadata API from Fast Healthcare Interoperability Resources — 1 operation(s) for metadata.19.9CityUHK Scholars OAI-PMHPublic OAI-PMH 2.0 endpoint for CityUHK Scholars, the university's research information system and institut...19.7Federal Emergency Management Agency Metadata APIAPI and dataset metadata19.7Memberful Members APIQuery members and their profiles, emails, subscriptions, downloads, and custom JSON metadata (up to 50 keys...19.4Orange Logic Metadata APIList and modify asset metadata - retrieve all metadata fields, update tags and linked fields, and manage la...19.4Lens Storage & MetadataLens content (post body, media, profile metadata) is stored as JSON following the Lens Metadata Standards a...18.6Norgate Data Futures MetadataFutures-specific reference data covering around 100 markets across 11 worldwide exchange groups - market an...17.5Norgate Data Security Metadata and ClassificationsSingle-value reference and metadata lookups for a security - name, symbol, asset id, domicile, currency, ex...17.5Norgate Data Watchlists and DatabasesEnumerate and resolve the security lists in the local database - user and Norgate-maintained watchlists, bu...17.5Yummly Metadata API (Historical)DEPRECATED / HISTORICAL. The Metadata endpoints (GET http://api.yummly.com/v1/api/metadata/{key}) returned ...17.4Java Reflection APIExamine and modify the runtime behavior of applications by inspecting classes, methods, fields, and annotat...16.3NetSuite SuiteTalk REST Web ServicesREST-based interface to NetSuite business objects as JSON resources with CRUD operations, SuiteQL high-perf...12.5Collibra Core REST APIThe Collibra Core REST API exposes the full Collibra Platform for programmatic management of communities, d...11.7Collibra Knowledge Graph GraphQL APIThe Knowledge Graph GraphQL API enables retrieval of Collibra assets, relations, communities, domains, and ...11.7
Minimal 1 Almost no public developer surface

Companies reaching this through an API (357)

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 Aarhus University Acuant Adobe Campaign Adobe Experience Cloud Affinda Agentic Resource Discovery (ARD) Alteryx ALTR Amazon Redshift Amazon Web Services American University of Beirut AmeriCorps Amiibo API Anaplan Apicurio Apollo.io Arizona State University Artashippinginc ASAPP Asapp3 Atlan Authenticx Authologic AutoCAD Autodesk Autodesk Fusion Autonomous University of Barcelona Autonomous University of Madrid Azure Monitor Backstage Barchart Battle.net Bigchaindb Blizzard Entertainment Boston University Bridge Bureau of Transportation Statistics California Institute of Technology CallMiner Candid Canonical Canvas Medical CaptivateIQ Castor CCH Tagetik CData Centene Chalmers University of Technology
Show all 357 companies ↓
Charles University Cisco XDR City University of Hong Kong Climate Engine 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 Crunchbase Crystal Reports Curtin University Dapr data.world Databento Databricks DataCite dbt Delinea Denodo Department of Energy Devtron Didomi Dify DiscGolfAPI DTN Dynatrace Eclipse Foundation Eigenpal Enso EPA — U.S. Environmental Protection Agency Eurostat Factiva FAO FAOSTAT Fast Healthcare Interoperability Resources Federal Emergency Management Agency FINRA Fivetran Forest Service Forethought Frame.io Frankfurter Freddie Mac Georgia Institute of Technology GitHub GitLab GitLab CI/CD Glassnode Google Analytics Google Workspace Gremlin Griffith University GZW Data API Hamad Bin Khalifa University HappyOrNot Hasura Hatchet Help Scout HERE Hokkaido University IEEE Xplore Immuta Immutable Incus Indian Institute of Science Bangalore Indian Institute of Technology Bombay Indian Institute of Technology Delhi Infinidat INRIX Inspectorio Intuit Invendor Iterable Java Jefferson Health JokeAPI Jupiter Kaltura Karlsruhe Institute of Technology KU Leuven Kubeflow Kubeflow Pipelines Kyoto University lakeFS Landing.ai 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 Mailchimp McGill University McMaster University MediaMath Memberful 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 University of Singapore NationGraph Netflix Conductor Netlify NHS API NHS Digital NHS England NOAA ERDDAP NOAA — National Oceanic and Atmospheric Administration Norgate Data Nutrical Solution OData Ohio State University OlympusDAO One Codex Onshape Ontraport OpenCitations OpenClinica Optimism Oracle Oracle Database Oracle NetSuite Oracle Siebel Orion Health Ory Outbrain Oxen Packagist ParaSwap ParlayAPI Peking University Pendo.io Perchwell Physna Picsart PicsArt (Socialin) Planet Labs Podchaser Pokémon TCG API Politecnico di Torino Polkadot Polymarket Postman PowerSchool PowerShell Princeton University Prometheus Promethium PropelAuth Public Sector PubMed Purdue University Pypestream Queen Mary University of London Queen's University Belfast Rackspace Technology Red Hat OpenShift Redocly Regrid Relativity RELEX Solutions Restaurant365 Revert Rice University Rippling RWTH Aachen University Salesforce Salesforce Experience Cloud Salesforce Flow Salesforce Sales Cloud 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 Solo.io Sorbonne University Spring Framework Springer Nature 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 Tokyo Institute of Technology 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 Teknologi Malaysia University of Aberdeen 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 Geneva University of Glasgow University of Helsinki University of Hong Kong University of Illinois Urbana-Champaign University of Indonesia University of Los Andes Colombia University of Manchester University of Navarra University of Nottingham 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 Wisconsin-Madison University of Zurich Unlock Protocol Uphold Uppsala University US Census Bureau Utrecht University Vanderbilt University Varian Medical Systems Vineyard Wappalyzer Warner Bros. Discovery Waseda University Western Power Workable WorkSpan World Bank World Meteorological Organization YouSign Yr Yummly Zora École des Ponts ParisTech École Normale Supérieure de Lyon École Normale Supérieure de Paris

Score breakdown

Frequency
78.5
log-scaled weighted occurrences
Breadth
1.8
spread across providers
Quality lift
46.3
mean composite of providers using it
Cohesion
24.9
strength of nearest seed neighbor

Related tags

OAI-PMH 113 co-occurrences University 113 co-occurrences Identity Federation 112 co-occurrences Open Access 95 co-occurrences SAML 105 co-occurrences Higher Education 113 co-occurrences Shibboleth 90 co-occurrences Research Data 91 co-occurrences

Where this tag comes from

Api tag490
Provider tag70
Openapi tag174
Openapi op tag503

Cohort brief

Auto-generated

The 68 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
68
all scored
Mean Kin Score
38.2
+15.3 vs catalog 22.9
Mean Agent Readiness
23.4
+11.5 vs catalog 11.9
Spread
3.4–64.4
median 37.3 · σ 12.2
How the 68 split by band
Exemplar 0Strong 9Developing 21Thin 29Emerging 7Minimal 2
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Contract Quality 41 17.6 +23.4 68
Operational Transparency 28.3 13.7 +14.6 68
Developer Ergonomics 35.9 23.2 +12.7 68
Access Clarity 38.4 26.5 +11.9 68
Discoverability 67 58.1 +8.9 68
Contract Governance 13.1 6.3 +6.8 68

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) 13% 14% -1
MCP server (first-party) 13% 12% +1
Agent Skills 0% 0% 0
OAuth scopes 22% 11% +11
Security 97% 98% -1
Arazzo workflows 1% 2% -1
Governance rules 45% 14% +31

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 64.4
  2. 2 MediaValet 61.7
  3. 3 Bynder 60.5
  4. 4 TVmaze 57
  5. 5 DataHub 56.9
  6. 6 Fabric Origin 56.8
  7. 7 Lakekeeper 55.3
  8. 8 Adobe Lightroom 54.8
  9. 9 The Movie Database 54.6
  10. 10 Sweep 52.2
Top by Agent Readiness
  1. 1 Fabric Origin 52.7
  2. 2 DataHub 51.4
  3. 3 Sweep 48.5
  4. 4 Collate 45.3
  5. 5 Lakekeeper 42.6
  6. 6 Soundcharts 40.3
  7. 7 Bynder 37.9
  8. 8 Yoast 37
  9. 9 WorldCat 35.6
  10. 10 TVU Networks 34.8
All 70 members of this roster resolve to a scored provider in the catalog.Generated from the catalog build of 5 October 2026, across 29093 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"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no form to fill in. Signing in shares your email address with us — we store it to create your key and to recognise you if you sign in with another provider. See our Privacy Policy and Terms.

A second provider on the same verified email joins the account you already have.