# x401 (x401.id)

Defines an HTTP handshake where a route demands signed identity proof and agents return a credential to retry.

- Atlas card: https://inite.ai/en/atlas/x401.id
- Site: https://x401.id
- For: Developers of services and AI agents that must prove identity over plain HTTP requests
- Categories: dev
- Use 8/100 · alive 100/100

## Used for

- require identity proof before a route serves an agent
- verify a credential from a trusted issuer on retry
- step up authentication for high-risk actions like wire changes

## Price

Not read yet.

## For developers

None found.
- Read 2026-10-23

## Your data

- Certifications stated: none
- Read 2026-10-23

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Source: INITE Atlas, https://inite.ai/en/atlas/x401.id. JSON: https://inite.ai/api/atlas/x401.id. MCP: https://inite.ai/api/mcp (atlas_lookup).