Feature
API Documentation
Reference docs, guides, and examples.
22 providers
73 APIs
15 declared variants
Structured reference documentation with endpoint details, parameters, errors, and worked examples. Quality of docs is consistently the top predictor of successful integration.
22 API providers on the APIs.io network offer api documentation. The highest-rated are Conekta, Encore, Apidog, Speakeasy, APIMatic.
Providers
Ranked by API Evangelist rating — Exemplar and Strong are expanded by default.
Strong 2 Solid coverage with minor gaps
Developing 7 Usable, with meaningful gaps to close
ApidogApidog is an all-in-one API development platform that connects the entire API lifecycle: visual API design,...SpeakeasyThe platform to Build APIs your users love. Best in class API tooling for robust SDKs, API docs, Terraform ...APIMaticAPIMatic is a developer experience platform for APIs that specializes in automated SDK generation, API docu...PolyAPIPoly, built using cutting-edge AI and Kubernetes-native technology, accelerates development and simplifies ...DreamFactoryAutomate the building, securing, and documenting of REST APIs for data products with built-in enterprise se...ArchbeeArchbee is a documentation platform for software teams that enables creating, managing, and publishing tech...KreaKrea is a real-time AI creative suite that lets designers, filmmakers, brand teams, and everyday creators g...
Thin 6 Limited public surface area
FernFern is an SDK generation and documentation platform designed for the AI era. It transforms OpenAPI, AsyncA...Agilent TechnologiesAgilent Technologies is a global leader in life sciences, diagnostics, and applied chemical markets, provid...Test FirstA software development approach where tests are written before the implementation code, ensuring code quali...Volvo CarsVolvo Cars is a Swedish premium automotive OEM (headquartered in Gothenburg, owned by Geely) that operates ...Canada PostCanada Post is the primary postal operator in Canada, offering a developer platform with REST and SOAP web ...APIGitAPIGit is a Git-native platform for full lifecycle API development that combines version control, API desig...
Emerging 7 Early or largely undocumented
ApiaryApiary is an API design and documentation platform, now part of Oracle Cloud Infrastructure. With 486,000+ ...BDD (Behavior-Driven Development)Behavior-Driven Development (BDD) is a software development methodology that combines test-driven developme...ApiNotesApiNotes is an interactive API documentation tool that generates developer portals with live endpoint testi...SpecFlowSpecFlow was an open-source BDD (Behavior-Driven Development) testing framework for .NET that allowed teams...API LeagueAPI League is a comprehensive API marketplace aggregating 60+ best-in-class APIs across categories includin...ApiableApiable is an API portal platform that enables businesses to create single-tenant, white-label developer po...WaterfallWaterfall is a sequential software development methodology where progress flows steadily downward through d...
What Providers Actually Declared
This feature is a canonical term. These are the free-text strings
providers wrote in their own apis.yml that map onto it.
API DocumentationAPI Documentation PortalsAuto-Generated API DocumentationAuto-generated API documentation and service catalog kept in sync with sourceCode ExamplesCode samples in cURL, Python, JavaScript, and Go on every endpointCode samples provided in Java, PHP, and C# for REST and SOAPComprehensive DocumentationGenerate Code ExamplesInteractive API DocumentationInteractive DocumentationLive API DocsLiving DocumentationOpen-source code samples (Node.js OAuth2 code flow, Connected Vehicle data fetch) on the Volvo Cars GitHub organization.Spanish-language API documentation and error messages aligned with Mexico (CNBV-regulated) market
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Every feature here is available over the APIs.io API and to AI agents over MCP. Features is not yet its own endpoint on the v1 API. Reach it through catalog search and the tag graph, or the MCP server.