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The Agent Economy

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x401

Beta

x401 is a beta listing under Identity and trust. Draft HTTP protocol at version 0.2.0. A server sends a PROOF-REQUEST header for a verifiable credential, the agent returns a PROOF-RESPONSE, and payment stays on HTTP 402. The listing is open source.

Last verified 2026-10-20

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Status
beta
Open source
Yes
Tags
credentials, http-401, openid4vp
Last verified
2026-10-20

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What is x401?
Draft HTTP protocol at version 0.2.0. A server sends a PROOF-REQUEST header for a verifiable credential, the agent returns a PROOF-RESPONSE, and payment stays on HTTP 402.
What is the status of x401?
x401 is beta in Identity and trust.
Is x401 open source?
Yes. The repository URL is one of the links on the listing.
When was x401 last verified?
Last verified 2026-10-20.

Sources