ART-23 · Branch A · Agentic Rail Chain · OpenChainGraph

Visa Trusted Agent Protocol Signature Inspector & Readiness

Visa's Trusted Agent Protocol lets an AI agent prove its identity and authorization to a merchant using HTTP Message Signatures (RFC 9421), aligned with Web Bot Auth. This node parses a TAP signature, surfaces the agent-recognition signature and its replay-protection parameters (timestamp, session id, key id, algorithm), and scores TAP readiness. Produces a §4 compliance_control OpenChainGraph artifact.

⚠ TAP introduced ~Oct 2025; evolving. RFC 9421 parsing is exact. TAP-specific labels (three-signature model, agent-recognition tag) are illustrative — verify against developer.visa.com. No signature is cryptographically verified here.
§4 OpenChainGraph · ART-23 Visa TAP · RFC 9421 · Web Bot Auth Zero PII Client-Side · No Network
▸ Inspect a TAP signature (RFC 9421)
Paste the Signature-Input and Signature headers from a TAP request. An example is pre-loaded.
▸ TAP readiness
Answer for your agent integration. TAP layers a scoped Visa tokenised credential over RFC 9421 agent recognition.