OpenAPI

OpenAPI (formerly Swagger Specification) is a standard, language-agnostic specification for describing RESTful APIs in a machine-readable format. It enables automated documentation generation, client code generation, and API testing, serving as a contract between API providers and consumers.

OpenAPI publishes 1 API on the APIs.io network. Tagged areas include Documentation, REST, and Specification.

The OpenAPI catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

OpenAPI’s developer surface includes documentation, engineering blog, and 4 more developer resources.

🌐 Visit website 📡 Source on GitHub

30.1/100 thin ▬ flat Agent 3/100 human only Full breakdown ↓
scored 2026-07-28 · rubric v0.6

AccessFreemium

1 APIs

DocumentationRESTSpecification

Kin Score

Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6

Composite quality — 30.1/100 · thin

Contract Quality 3.2 / 25

Developer Ergonomics 2.2 / 20

Commercial Clarity 7.9 / 20

Operational Transparency 4.8 / 13

Governance 7.0 / 12

Discoverability 5.0 / 10

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/openapi: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

OpenAPI Specification

The OpenAPI Specification (OAS) defines a standard, programming language-agnostic interface description for HTTP APIs.

Open Collections 29

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

Rate Limits 1

Documented rate limits and quota policies.

Openapi Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

JSON Schema 25

Standalone JSON Schema definitions for this provider's data models.

Scroll for all 25

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LlmsText

LlmsText

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization

GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: openapi
name: OpenAPI
description: OpenAPI (formerly Swagger Specification) is a standard, language-agnostic specification for describing RESTful
  APIs in a machine-readable format. It enables automated documentation generation, client code generation, and API testing,
  serving as a contract between API providers and consumers.
type: Index
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/openapi.png
tags:
- Documentation
- REST
- Specification
url: https://raw.githubusercontent.com/api-evangelist/openapi/refs/heads/main/apis.yml
created: '2025-01-01'
modified: '2026-04-28'
specificationVersion: '0.19'
apis:
- aid: openapi:openapi-specification
  name: OpenAPI Specification
  description: The OpenAPI Specification (OAS) defines a standard, programming language-agnostic interface description for
    HTTP APIs.
  humanURL: https://spec.openapis.org/oas/latest.html
  tags:
  - API Description
  - OpenAPI
  - REST
  properties:
  - type: Documentation
    url: https://spec.openapis.org/oas/v3.1.0
  - type: Reference
    url: https://github.com/OAI/OpenAPI-Specification
common:
- type: DomainSecurity
  url: security/openapi-domain-security.yml
- type: Website
  url: https://www.openapis.org/
- type: Documentation
  url: https://spec.openapis.org/oas/latest.html
- type: GitHubOrganization
  url: https://github.com/OAI
- type: Blog
  url: https://www.openapis.org/blog
- type: LlmsText
  url: https://www.openapis.org/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com