Accepts an x401 payload (https://x401.proof.com/spec/latest/#x401-payload) that wraps a Digital Credentials API request (https://www.w3.org/TR/digital-credentials/#DC-API) using the openid4vp-v1-signed protocol, and processes it as an OID4VP presentation request for the End-User identified by the login_hint claim of the signed request object.

The real OID4VP request is carried inside the signed request object at credential_requirements.digital.requests[0].data.request: a compact JWS with typ header oauth-authz-req+jwt, signed with ES256 by a key whose JWK is registered on your OAuth Application. Your client_id is conveyed by the request object's iss/client_id claims. Its response_mode must be dc_api.

On success Proof returns a request_uri suitable for presenting to the End-User via their AI agent. Supply a top-level return_uri to use the x401 intermediary return channel (https://x401.proof.com/spec/latest/#return-channel); its origin must appear in the request object's expected_origins.