# ReqRes (reqres.in)

Hosts stable mock REST endpoints with persistent data, auth flows and deliberate failure injection for test suites.

- Atlas card: https://inite.ai/en/atlas/reqres.in
- Site: https://reqres.in
- For: QA teams and developers who need a predictable REST API with real backend behaviour to test against
- Use 53/100 · alive 100/100

## Used for

- test login and register flows, including wrong-password and missing-field failures
- run CRUD test suites against persistent sample collections
- prototype frontend features against a hosted backend with no server setup

## Price

- from 5 USD/month, free plan (read 2026-10-17 on https://reqres.in/#pricing)

## For developers

- OpenAPI: https://reqres.in/openapi.json (42 paths)
- API docs: https://reqres.in/api-docs
- MCP server: in.reqres/reqres (namespace; open on 2026-10-17, 7 tools)
- Read 2026-10-17

## MCP server, measured daily

Server: https://reqres.in/mcp, checked every day since 2026-10-19 (16 checks).

- Answered: 100% of daily checks
- Median first answer: 323 ms
- Sign-in: none
- Context its tool definitions take: about 1006 tokens (7 tools)
- Tool definitions: A, 93/100
- Failing "params_described": 3 of 7 tools
- Warning "open_writes": create_project, create_collection, create_record, update_record, delete_record
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: gdpr
- Read 2026-10-17

---

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