Three-stage autonomous procurement and micro-metered payment routing pipeline. Resolves the protocol arbitrage question, enforces an atomic spend cap via a W3C-compatible mandate, and validates the transaction against the team budget envelope: enabling sub-dollar M2M settlement that card interchange floors make impossible.
Compare AP2, ACP/Shared Payment Token, x402, Visa TAP, and Mastercard Agent Pay across credential, signing, scope, rail, and audit dimensions for your scenario. Micro-transactions <$1 favour x402 or AP2 due to interchange floor avoidance.
Paste the recommendation or matrix output from T276. Minimum: the recommended protocol name (e.g. "x402" or "AP2").
Issue a W3C Verifiable Credential-compatible AP2 mandate scoped to this exact transaction. Set the "Cart Mandate" cap (e.g. $0.04) to enforce that the agent cannot spend beyond the single approved amount: eliminating runaway agentic spend.
Paste the mandate JSON from T285: the output VDC that encodes the spend cap and mandate type.
Validate the mandate against your organisation's policy rules: ensuring the transaction doesn't breach aggregate team budget envelopes, mandate schema requirements, or compliance controls. A failed validation halts the clearinghouse.
Paste the validation output from T320. Include the validation status (valid / invalid) and any schema findings.