# Public APIs (publicapis.io)

Catalogues over 1,500 free public REST APIs with category browsing, code examples and side-by-side comparisons.

- Atlas card: https://inite.ai/en/atlas/publicapis.io
- Site: https://publicapis.io
- For: developers and AI agents looking for free public APIs for their projects
- Categories: dev
- Use not measured/100 · alive 100/100

## Used for

- find free public APIs by category
- compare alternatives to a given API
- copy code examples to call an API

## Price

- no price printed (read 2026-10-16 on https://publicapis.io/codex-data-api)

## For developers

- MCP server: io.publicapis/directory (namespace; open on 2026-10-16, 8 tools)
- Read 2026-10-16

## MCP server, measured daily

Server: https://publicapis.io/mcp, checked every day since 2026-10-19 (4 checks).

- Answered: measuring, 4 daily checks so far
- Median first answer: 1869 ms
- Sign-in: none
- Context its tool definitions take: about 895 tokens (8 tools)
- Tool definitions: B, 81/100
- Failing "params_described": 7 of 8 tools
- Failing "annotations": 2 of 8 tools
- Warning "destructive_unmarked": send_message
- Warning "open_writes": send_message
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: none
- Read 2026-10-16

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Source: INITE Atlas, https://inite.ai/en/atlas/publicapis.io. JSON: https://inite.ai/api/atlas/publicapis.io. MCP: https://inite.ai/api/mcp (atlas_lookup).