APIs.io

aid: apis-io
name: APIs.io
description: APIs.io is an open source API search engine and directory that uses APIs.json files to discover, index, and catalog
  APIs across the web. Built on the APIs.json specification, it provides a searchable entry point for developers to find public
  APIs by keyword, resource, action, persona, domain, and schema. The platform indexes 779 providers, 3,188 APIs, 587 capabilities,
  36,602 schemas, 49 event specs, 2,078 vocabularies, and 450 rulesets. It is maintained by Kin Lane, Nicolas Grenier, and
  Steven Willmott and supports both API producers (submitting APIs) and API consumers (discovering APIs). APIs.io uses a Spectral-powered
  rating system to evaluate API documentation quality.
type: Index
image: https://kinlane-productions.s3.amazonaws.com/apis-json/apis-json-logo.jpg
tags:
- API Aggregation
- API Directory
- API Discovery
- API Indexing
- API Rating
- API Search
- APIs.json
- Search Engine
url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/apis.yml
created: '2026-03-26'
modified: '2026-05-19'
specificationVersion: '0.19'
apis:
- aid: apis-io:search-api
  name: APIs.io Search API
  description: The APIs.io Search API allows developers to search for APIs across all indexed APIs.json files using keywords
    or phrases, and to submit new APIs to the index by providing a valid APIs.json document. The API supports pagination,
    filtering, and returns results with name, description, tags, score, and URLs. Authentication is handled via the separate
    Authentication API which converts GitHub Personal Access Tokens into API keys.
  humanURL: https://developer.apis.io/documentation/
  baseURL: https://search-api.apis.io
  tags:
  - API Discovery
  - API Indexing
  - API Search
  - APIs.json
  properties:
  - type: Documentation
    url: https://developer.apis.io/documentation/
  - type: OpenAPI
    url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/openapi/apis-io-search-openapi.yaml
  - type: Postman Collection
    url: https://www.postman.com/api-evangelist/apis-io-api-evangelist-engine/collection/hn8xpmd/apis-io-search-api
  - type: Authentication
    url: https://developer.apis.io/authentication/
  - type: RateLimits
    url: https://developer.apis.io/plans/
  - type: ChangeLog
    url: https://developer.apis.io/change-log/
  - type: StatusPage
    url: https://www.postman.com/api-evangelist/apis-io/monitor/APIs-io-Search---Status~1ef6bc29-9da9-4040-b98b-cef03be1155e
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-search-schema.json
    title: Search Response Schema
  - type: JSONSchema
    url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/json-schema/apis-io-search-ap-is-json-schema.json
    title: APIs.json Schema
  - type: NaftikoCapability
    url: capabilities/search-apis.yaml
  - type: NaftikoCapability
    url: capabilities/search-search.yaml
common:
- type: ArazzoWorkflows
  url: arazzo/
  workflows:
  - url: arazzo/apis-io-compare-keyword-coverage-workflow.yml
    name: APIs.io Compare Keyword Coverage
    summary: Run two keyword searches against APIs.io and compare how many APIs the index holds for each term.
  - url: arazzo/apis-io-paginate-search-results-workflow.yml
    name: APIs.io Paginate Search Results
    summary: Read the first page of a keyword search, learn the total page count, then fetch a following page of results.
  - url: arazzo/apis-io-search-apis-workflow.yml
    name: APIs.io Search APIs by Keyword
    summary: Search the APIs.io registry for APIs matching a keyword and branch on whether any results were returned.
  - url: arazzo/apis-io-submit-and-verify-api-workflow.yml
    name: APIs.io Submit and Verify API
    summary: Submit a valid APIs.json to the APIs.io index, then search the registry to confirm the submitted API appears.
- type: Website
  url: https://apis.io
- type: About
  url: https://apis.io/about/
- type: Blog
  url: https://apis.io/blog/
- type: DeveloperPortal
  url: https://developer.apis.io/
- type: Blog
  url: https://developer.apis.io/blog/
  title: Developer Blog
- type: GettingStarted
  url: https://developer.apis.io/getting-started/
- type: Authentication
  url: https://developer.apis.io/authentication/
- type: Plans
  url: https://developer.apis.io/plans/
- type: ChangeLog
  url: https://developer.apis.io/change-log/
- type: ReleaseNotes
  url: https://developer.apis.io/change-log/
- type: Versioning
  url: https://developer.apis.io/versioning/
- type: Support
  url: https://developer.apis.io/support/
- type: TermsOfService
  url: https://developer.apis.io/terms-of-service/
- type: PrivacyPolicy
  url: https://developer.apis.io/privacy-policy/
- type: GitHubOrganization
  url: https://github.com/api-search
- type: GitHubRepository
  url: https://github.com/apisio/apis.io
- type: GitHubRepository
  url: https://github.com/api-search/apis-io-search
  title: Search API
- type: GitHubRepository
  url: https://github.com/api-search/apis-io-engine
  title: Search Engine
- type: GitHubRepository
  url: https://github.com/api-search/apis-io-authentication
  title: Authentication API
- type: GitHubRepository
  url: https://github.com/api-search/apis-io-ratings
  title: Ratings API
- type: SpectralRules
  url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/rules/apis-io-spectral-rules.yml
- type: Vocabulary
  url: https://raw.githubusercontent.com/api-evangelist/apis-io/refs/heads/main/vocabulary/apis-io-vocabulary.yaml
- type: Features
  data:
  - name: API Search
    description: Full-text search across 3,000+ indexed APIs by keyword, resource, action, persona, domain, and schema using
      a cloud search engine.
  - name: APIs.json Indexing
    description: Automatically indexes APIs.json files submitted by API producers to build a comprehensive, machine-readable
      catalog of API operations.
  - name: API Submission
    description: API producers can submit their APIs to the index by providing a valid APIs.json document via the Search API
      POST endpoint or GitHub issues.
  - name: Spectral API Ratings
    description: Spectral-powered quality rating system that evaluates API documentation completeness and scores APIs to help
      consumers identify high-quality APIs.
  - name: Microservice Architecture
    description: Built as a set of microservices including Search, Engine, Authentication, Publishing, Tags, Rules, Properties,
      Maintainers, and Ratings APIs.
  - name: Topic Search Nodes
    description: Specialized search nodes for domain-specific API discovery including AI, Healthcare, Banking, Payments, Weather,
      CRM, Cloud, and many more topic areas.
  - name: Open Source
    description: The platform is open source, licensed under Apache-2.0, with all microservice APIs available on GitHub under
      the api-search organization.
- type: UseCases
  data:
  - name: API Discovery
    description: Developers can search for APIs relevant to their project by keyword, discovering APIs across thousands of
      providers without knowing where to look.
  - name: API Submission
    description: API producers can submit their APIs.json files to ensure their APIs are discoverable in the index and properly
      cataloged with metadata.
  - name: Quality Assessment
    description: Development teams use the Spectral ratings system to identify high-quality APIs and avoid poorly documented
      or unmaintained options.
  - name: Catalog Building
    description: Platform teams use APIs.io as a reference implementation for building their own internal API catalogs using
      the APIs.json format.
  - name: Domain-Specific Search
    description: Developers searching for APIs in specific domains (healthcare, finance, AI) can use topic-specific search
      nodes for more targeted discovery.
- type: Integrations
  data:
  - name: APIs.json
    description: Core integration with the APIs.json specification for machine-readable API description and discovery across
      the web.
  - name: OpenAPI
    description: APIs indexed in APIs.io reference OpenAPI specifications as a key property, linking consumers to technical
      API contracts.
  - name: Spectral
    description: Spectral ruleset integration powers the APIs.io rating system, evaluating API documentation quality against
      standardized rules.
  - name: GitHub
    description: GitHub integration for API submission via issues, source of truth for indexed APIs.json files, and authentication
      via Personal Access Tokens.
  - name: Postman
    description: Postman public workspace integration for running and testing the APIs.io Search API via pre-built collections.
  - name: AWS API Gateway
    description: The APIs.io Search API is deployed and managed through AWS API Gateway for scalable, managed API access.
maintainers:
- FN: Kin Lane
  email: [email protected]