Documentation
Overview
The APIs.io API is a read-only discovery API over the APIs.io catalog — thousands of API providers and their published APIs, plus tags, industries, regions, ratings, and machine-readable artifacts (OpenAPI, AsyncAPI, Postman, Arazzo, JSON Schema, JSON-LD, GraphQL, rules, and more).
The same OpenAPI contract powers three surfaces:
- REST API —
https://apis.io/api/v1(API Reference) - MCP server —
https://apis.io/mcpfor AI agents (MCP Server) - Agent skills — apis.io/skills
Base URL
Code
All endpoints are GET, open, and read-only — see Authentication.
Core resources
| Resource | Path |
|---|---|
| Unified search | /search |
| Providers | /providers, /providers/{slug} |
| APIs | /apis, /apis/{aid} |
| Tags | /tags, /tags/{slug} |
| Industries / Regions | /industries, /regions |
| Ratings | /ratings, /ratings/rubric, /providers/{slug}/rating |
| Artifact collections | /openapis, /asyncapis, /postman, /json-schemas, … |
Identifiers: providers are slugs (twilio); APIs are provider:api-slug (twilio:twilio-accounts-api).
Start with Getting Started for runnable examples, or jump to the API Reference.
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