Schema
Variants seen in the corpus:
Schemaschema
Providers using this tag (8)
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Strong 1 Solid coverage with minor gaps
Thin 1 Limited public surface area
Emerging 2 Early or largely undocumented
Minimal 1 Almost no public developer surface
Unrated 1 Not yet scored
APIs with this tag (97)
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 10 Complete, well-documented, and agent-ready
HubSpot CRM Associations Schema APIHubSpot CRM Associations Schema — 9 operation(s) from HubSpot's published OpenAPI.HubSpot Custom Objects APICustom objects allow you to define and create CRM object types that represent data unique to your business....Snowflake schema APIThe schema API from Snowflake — 4 operation(s) for schema.Optimizely Schema APIManage the ODP schema including domain objects and their fields.RudderStack Data Catalog APIThe RudderStack Data Catalog API exposes the inventory of events and properties seen across all sources, su...Microsoft Azure Resource JSON SchemaJSON Schema definitions for core Azure Resource Manager data models including the base Resource type, Resou...Microsoft Azure Schema APIThe Schema API from Microsoft Azure — 2 operation(s) for schema.Authentik Schema APIThe self-describing OpenAPI schema endpoint every authentik instance serves.Microsoft Azure API Management Schema APIThe Schema API from Microsoft Azure API Management — 2 operation(s) for schema.API Evangelist SchemaThe naming and structure of the digital objects we pass back and forth via APIs within the business and per...
Strong 12 Solid coverage with minor gaps
Lucid Schema APIDefine and retrieve the schema for a collection, specifying the fields, types, and constraints for its data...Lytics Schema APIManage how data sources populate profile fields.COS Registration Server APIPart of the Canonical Observability Stack for robotics and edge fleets. The registration server API registe...Encharge Custom Objects Schema APIThe Custom Objects Schema API from Encharge — 10 operation(s) for defining object types, their fields, and ...GZW Data API Schema APIThe Schema API from GZW Data API — 2 operation(s) for schema.Refuel Schema APIThe Schema API from Refuel — 1 operation(s) for schema.Celonis Schema APIThe Schema API from Celonis — 6 operation(s) for schema.ServiceNow CMDB Meta APIThe ServiceNow CMDB Meta API provides REST endpoints for retrieving metadata about CMDB classes, including ...Ablo Schema APIThe schema API from Ablo — 1 operation(s) for schema.Tyk Schema APIGet OAS schema.SuprSend Schema APIThe Schema API from SuprSend — 3 operation(s) for schema.Autodesk Schema APIThe Schema API from Autodesk — 1 operation(s) for schema.
Developing 36 Usable, with meaningful gaps to close
Looker Studio Schema APIOperations for defining the data structure and field definitions returned by the connector.Monetate Schema APISchema related endpoints.Hasura Metadata APIHasura metadata management.NetBox Labs schema APIThe schema API from NetBox Labs — 1 operation(s) for schema.Fixie schema APIThe schema API from Fixie — 1 operation(s) for schema.Skedulo Schema APIThe Schema API from Skedulo — 1 operation(s) for schema.Authzed Schema APIManage SpiceDB schema definitions, diff schemas, and reflect schema metadataFairmarkit Schema APIThe Schema API from Fairmarkit — 2 operation(s) for schema.Aito Technologies schema APIThe schema API from Aito Technologies — 5 operation(s) for schema.Apache APISIX Schema APIValidate resource configurations against APISIX schemas.Nimble Contacts Fields APIUser-definable contact field schema — fields, choice option lists, field groups and tabs, plus primary-valu...Weaviate schema APIThe schema API from Weaviate — 12 operation(s) for schema.Aptly Schema APIThe Schema API from Aptly — 1 operation(s) for schema.AT Protocol Lexicon SchemasLexicon is the schema definition language for AT Protocol. Every record type, XRPC method, and event subscr...AGNTCY Schema APIThe Schema API from AGNTCY — 8 operation(s) for schema.Utrecht University schema APIThe schema API from Utrecht University — 1 operation(s) for schema.Kaltura schema APIExpose the schema definitions for syndication MRSS, bulk upload XML and other schema types.OpsMill Schema APIThe Schema API from OpsMill — 6 operation(s) for schema.Nex Schema APIThe Schema API from Nex — 4 operation(s) for schema.Sparetech Schema APIThe Schema API from Sparetech — 2 operation(s) for schema.Wger Schema APIThe schema API from Wger — 1 operation(s) for schema.Protocol Buffers Service Definition SchemaJSON Schema for Protocol Buffers service definition format (.proto files). Describes the structure of gRPC ...APIToolkit (Monoscope) Schema APIRetrieve telemetry field schema for a project.Sensors Data Schema APIThe Schema API from Sensors Data — 13 operation(s) for schema.Weblate schema APIThe schema API from Weblate — 1 operation(s) for schema.RBS (Ruby Type Signatures)A language for describing the structure of Ruby programs. Lets developers declare classes, modules, method ...Helm Chart.yaml SchemaJSON Schema defining the structure and validation rules for Chart.yaml, the metadata file required in every...Helm Repository Index SchemaJSON Schema for the index.yaml file served by Helm chart repositories. The index is the primary discovery m...Helm Values YAML SchemaJSON Schema describing common conventional patterns for values.yaml files in Helm charts. Values.yaml provi...GuestReady Schema APIThe schema API from GuestReady — 1 operation(s) for schema.Apache Solr Schema APIRead and modify the schema of a collectionCybersecurity and Infrastructure Security Agency Schema APIJSON Schema for the KEV catalogConxai schema APIThe schema API from Conxai — 1 operation(s) for schema.SilverStripe GraphQL APISilverStripe's GraphQL API provides a content API layer for getting data in and out of the CMS. It supports...TigerGraph Schema APIThe Schema API from TigerGraph — 3 operation(s) for schema.Cognite Schema APISchema provides the expected schema for CDF resources.
Thin 21 Limited public surface area
WAODAO Schema APIRead WAODAO-specific field semantics and discovery links.SmartMind schema APIThe schema API from SmartMind — 2 operation(s) for schema.Docling Core TypesCanonical `DoclingDocument` data model and serialization primitives — text, tables, pictures, layout, hiera...Triplit Schema APIDatabase schema managementSinclair, Inc. Schema APISelf-describing metadata: content types, taxonomies and statuses.Emitwise Schema APIActivity data schema definitions.APIs.io Engineering Platform Schema APIThe **Schema** endpoints enable you to manage your API definitions. These endpoints also support multi-file...ISteamUserStatsISteamUserStats provides global achievement percentages, schema for game stats and achievements, and per-us...ISteamWebAPIUtilISteamWebAPIUtil provides helper endpoints — GetServerInfo (Steam server time/version) and GetSupportedAPIL...tidb Schema APIEndpoints for retrieving database and table schema information from the TiDB information schema.Fibery GraphQL APIGraphQL API for querying and mutating Fibery workspace data, with an interactive IDE for schema exploration...Fragment Schema APIDefine and version the ledger Schema - the chart of accounts, account types (asset, liability, income, expe...Amazon AppSync Schema APIManage GraphQL schema documentsSchema.org Markup ValidatorThe Schema.org Markup Validator tests and validates structured data markup against the Schema.org vocabular...Schema.org WebAPI TypeThe Schema.org WebAPI type defines a Web API accessible over Web and Internet technologies. It provides sta...Port Blueprints APIEndpoints to create, read, update, and delete blueprints - the schemas that define an organization's data m...NetBox schema APIThe schema API from NetBox — 1 operation(s) for schema.fauna Schema APIFetch, update, validate, and manage a database's schema as FSL files. Supports staged schema changes with s...MCP SpecificationThe authoritative protocol definition for the Model Context Protocol, maintained at modelcontextprotocol.io...JSON SchemaThe vocabulary that lets an agent validate request and response bodies against typed contracts. Published J...Arkose Labs Schema APIMachine-readable request/response schemas
Emerging 17 Early or largely undocumented
Reactome schema APIReactome Data: Schema class queriesLEAF4Life API DiscoveryThe self-describing routes of the deployment — registered post types, taxonomies and post statuses, plus th...Apache Solr REST APIHTTP/REST API for Apache Solr providing endpoints for querying, indexing, schema management, collections ad...Apache Solr Schema APIPer-collection schema operationsGraphQL SDLGraphQL is a query language and runtime for APIs, defined by the GraphQL Specification. The GraphQL Schema ...JSON SchemaJSON Schema is a declarative language for annotating and validating JSON documents. It is the foundational ...JSON StructureJSON Structure is an emerging open specification that extends and complements JSON Schema with a clearer, m...Gleeful AI Schema APIThe Schema API from Gleeful AI — 1 operation(s) for schema.Overture SchemaCanonical open schema specification for all Overture themes, maintained in the OvertureMaps/schema GitHub r...Citation File Format SchemaThe CFF schema defines the structure of a CITATION.cff file in YAML, including required cff-version, messag...FVAP.gov Schema APIXML schema definition.Allotex Schema APIRegistered post types, taxonomies and statuses.Zipline Ai schema APIThe schema API from Zipline Ai — 5 operation(s) for schema.Apache Parquet Format SpecificationThe core specification for the Parquet columnar storage format.Amazon Web Services Schema APIThe Schema API from Amazon Web Services — 1 operation(s) for schema.Apache Avro Schema FormatJSON Schema for validating Apache Avro schema definitions. Covers all Avro types including primitive types ...Cap'n Proto Schema LanguageThe Cap'n Proto schema language is used to define message types in .capnp files that are then compiled into...
Companies reaching this through an API (85)
These companies publish an API, specification or operation carrying “Schema” 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.
Ablo
Agent Readiness
Aito Technologies
Allotex
Amazon AppSync
Amazon Web Services
Apache APISIX
Apache Avro
Apache Parquet
Apache Solr
Apache Solr
API Evangelist
API Specifications
APIs.io Engineering Platform
APIToolkit (Monoscope)
Aptly
Arkose Labs
AT Protocol
Authentik
Authzed
Autodesk
Canonical
Celonis
Citation File Format
Cognite
Conxai
Cybersecurity and Infrastructure Security Agency
Docling
Emitwise
Encharge
Fairmarkit
Fauna
Fibery
Fixie
Fragment
FVAP.gov
Gleeful AI
gRPC
GuestReady
GZW Data API
Hasura
Helm
HubSpot
Kaltura
LEAF4Life
Looker Studio
Lucid
Lytics
Microsoft Azure
Microsoft Azure API Management
Show all 85 companies ↓
Model Context Protocol (MCP)
Monetate
NetBox
NetBox Labs
Nex
Nimble
OpsMill
Optimizely
Overture Maps Foundation
Port
Reactome
Refuel
Ruby Programming Language and Popular API Gems
RudderStack
Schema.org
Sensors Data
ServiceNow
SilverStripe
Sinclair, Inc.
Skedulo
SmartMind
Snowflake
Sparetech
Steam
SuprSend
Tidb
TigerGraph
Triplit
Tyk
Utrecht University
WAODAO
Weaviate
Weblate
Wger
Zipline Ai
Score breakdown
Frequency
61.8
log-scaled weighted occurrences
Breadth
0.2
spread across providers
Quality lift
35.5
mean composite of providers using it
Cohesion
0.0
strength of nearest seed neighbor
Related tags
Query 15 co-occurrences
Tag 6 co-occurrences
OIDC 6 co-occurrences
Timelines 5 co-occurrences
Token 8 co-occurrences
Changes 5 co-occurrences
Batch 8 co-occurrences
Validation 7 co-occurrences
Where this tag comes from
Api tag97
Provider tag8
Openapi tag55
Openapi op tag192
Work with this as data
Every tag here is available over the APIs.io API and to AI agents over MCP.