emerging · -1.0 personamarketcapability personadomainactionschema

API Documentation

Score 22.0 / 100 29 providers +4 via APIs 9 APIs Search apis.io →
Business capabilities this tag reaches
Developer Platform & API Ecosystem Management 1

Providers using this tag (29)

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

Exemplar 9 Complete, well-documented, and agent-ready
RedoclyArtificial IntelligenceAPI CatalogArazzo4 APIs81.2ScalarAPI ClientAPI ReferenceCode Generation2 APIs76.4PostmanEnvironmentFlowSpecificationWorkspace21 APIs82.5StoplightAPI DesignAPI GovernanceAsyncAPI1 API74.1GitBookContentDocumentationExperienceIntegration1 API71.5ArchbeeDocumentation PlatformKnowledge BaseTechnical Writing11 APIs70.8ReadMeDocumentationDeveloper HubAPI ReferencePortal2 APIs68.8RoutebaseAPI lifecycle managementAPI DesignOpenAPI1 API67.7TreblleAnalyticsArtificial IntelligenceDeveloper ExperienceDocumentation1 API67.4
Strong 5 Solid coverage with minor gaps
TheneoDeveloper PortalDeveloper ToolsDocumentation Platform1 API61.0Bump.shAPI ChangelogAPI HubAPI Governance1 API65.2MintlifyDocumentationDeveloper PortalMCP1 API65.2OctriCompanyOpenAPIDocumentationSDK2 APIs58.4SmartBearAPI DesignAPI TestingContract Testing1 API57.0
Developing 3 Usable, with meaningful gaps to close
ReadMe.ioCompanyDocumentationDeveloper Experience3 APIs41.6Document360DocumentationKnowledge BaseSoftware-as-a-ServiceKnowledge Management1 API52.0SwytchcodeAI / Agent Toolingagentic middlewareAPI IntegrationAPI Orchestration1 API44.0
Thin 8 Limited public surface area
SpecwayDeveloper ToolsAI IntegrationInteractive Docs1 API39.1FernAPI LifecycleSDK GenerationClient Library1 API35.0ReadMe MetricsAPI AnalyticsAPI LogsAPI Metrics1 API32.9Saga LabsCompanyDeveloper ToolsSoftware-as-a-Service1 API32.5opendocs-cloudCompanyCloud PlatformDeveloper Tools28.1Stoplight ElementsDeveloper ToolsDocumentationInteractive Docs1 API26.8VoidenAPI DesignAPI TestingDeveloper Tools1 API30.3agenticweb-wikiWeb StandardsAgentsOpen Knowledge1 API28.8
Emerging 4 Early or largely undocumented
ReDocDeveloper ToolsDocumentationOpenAPI1 API23.7SlateDeveloper ToolsDocumentationMarkdown1 API23.4doc2mcp-siteAI IntegrationMCPDeveloper Tools1 API22.7KonfigSDK GenerationClient LibraryDeveloper Tools5 APIs12.0

APIs with this tag (8)

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 4 Complete, well-documented, and agent-ready
Stoplight ElementsElements is an open-source toolkit for building beautiful, interactive API documentation from OpenAPI speci...74.1Stoplight PlatformStoplight Platform is a SaaS collaborative API design and documentation management tool providing a visual ...74.1Kong API Documentation APIThe API Documentation API from Kong — 3 operation(s) for api documentation.73.8Entur API Documentation APIOpenAPI specification endpoints.70.5
Developing 1 Usable, with meaningful gaps to close
Swytchcode Documentation & Agent SurfacesSwytchcode's publicly consumable surfaces: developer documentation and a published llms.txt. The primary in...44.0
Emerging 3 Early or largely undocumented
ReDocReDoc is an open-source API documentation renderer for OpenAPI specifications, originally created by Rebill...23.7SlateSlate is an open-source static site generator for creating beautiful, three-panel API documentation from Ma...23.4OpenAPI SpecificationThe OpenAPI Specification (OAS) defines a standard, language-agnostic interface to RESTful APIs which allow...14.9

Companies reaching this through an API (4)

These companies publish an API, specification or operation carrying “API Documentation” 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.

AMCS Group Entur Kong REST

Score breakdown

Frequency
41.0
log-scaled weighted occurrences
Breadth
0.4
spread across providers
Quality lift
49.7
mean composite of providers using it
Cohesion
11.2
strength of nearest seed neighbor

Where this tag sits

Documentation broader Developer Tools broader

Related tags

Developer Portal 10 co-occurrences API Design 6 co-occurrences Documentation 18 co-occurrences Developer Experience 5 co-occurrences OpenAPI 19 co-occurrences API Testing 5 co-occurrences CI/CD 5 co-occurrences Testing 6 co-occurrences

Where this tag comes from

Provider tag29
Api tag9
Openapi tag2
Openapi op tag8

Cohort brief

Auto-generated

The 27 providers in the APIs.io catalog tagged API Documentation, scored on the Kin Score. Every figure below is computed from the catalog — nothing here is written.

Providers
27
of 29 in the catalog
Mean Kin Score
50.3
+26.2 vs catalog 24.1
Mean Agent Readiness
29.6
+15.5 vs catalog 14.1
Spread
12–82.5
median 52 · σ 20.7
How the 27 split by band
Exemplar 9Strong 4Developing 3Thin 8Emerging 3Minimal 0
Facet averages, against the whole catalog
FacetThis cohortCatalogDifferenceScored
Access Clarity 60.6 30 +30.6 27
Developer Ergonomics 52.3 24.5 +27.8 27
Operational Transparency 40.2 13.2 +27 27
Contract Quality 42.9 18.6 +24.3 27
Contract Governance 27.7 9.7 +18 27
Discoverability 69.5 59.1 +10.4 27

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) 48% 18% +30
MCP server (first-party) 52% 16% +36
Agent Skills 0% 0% 0
OAuth scopes 19% 13% +6
Security 93% 99% -6
Arazzo workflows 11% 1% +10
Governance rules 81% 36% +45

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 Postman 82.5
  2. 2 Redocly 81.2
  3. 3 Scalar 76.4
  4. 4 Stoplight 74.1
  5. 5 GitBook 71.5
  6. 6 Archbee 70.8
  7. 7 ReadMe 68.8
  8. 8 Routebase 67.7
  9. 9 Treblle 67.4
  10. 10 Bump.sh 65.2
Top by Agent Readiness
  1. 1 Archbee 59.3
  2. 2 Postman 55.6
  3. 3 Scalar 54.6
  4. 4 Bump.sh 54.4
  5. 5 Routebase 52.8
  6. 6 GitBook 52.1
  7. 7 Mintlify 50.4
  8. 8 Fern 38.6
  9. 9 Redocly 36.4
  10. 10 agenticweb-wiki 35.8
All 29 members of this roster resolve to a provider in the catalog; 27 carry a score (93%). The figures above describe the scored members only.Generated from the catalog build of 14 November 2026, across 41591 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

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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 →

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