ART-62 · Wave 14 · Agent Economy Runtime · W-B flagship

AP2 PaymentReceipt Verifier & HNP Guardrail

Verify an AP2 v0.2 PaymentReceipt against its signed mandate chain (Intent → Cart → Payment) and apply the Human-Not-Present (HNP) autonomy guardrail. Answers the runtime trust question AP2 v0.2 opened: "this agent paid with no human present — was the receipt valid and the autonomy authorized?" Client-side, zero-egress; emits a hash-anchored OpenChainGraph v0.4 artifact.

Runtime/post-trade — ART-62 verifies the receipt AFTER an executed payment + gates HNP autonomy. art-01 validates the mandate chain BEFORE the buy (pre-trade). AP2 v0.2 PaymentReceipt + HNP is a new primitive (FIDO Alliance, Apr 2026).
Educational verifier — not legal or payment advice · AP2 v0.2: FIDO Alliance (donated by Google Apr 2026) · Verify rules against current ap2-protocol.org primary sources
🔒 All inputs are processed locally in your browser. No data is transmitted. Do not enter real personal data — use synthetic or anonymised inputs only.
Payment receipt
Mandate chain
HNP policy (applies when human not present)
Receipt verdict
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HNP verdict
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Mandate chain
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OpenChainGraph v0.4 artifact · execution_hash:
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Ask your agent

    
  

  
Copy this paragraph into Claude, OpenClaw, or any MCP-aware agent to run this exact tool, with this sample, and verify the artifact.

  
Run the AINumbers MCP tool `verify_ap2_payment_receipt`. Task: Verify an AP2 v0.2 PaymentReceipt against its signed Intent/Cart/Payment mandate chain, and applies the Human-Not-Present (HNP) autonomy guardrail: amount, category, mandate age, cart freshness.
Call it with arguments: {"policy_parameters":{}}
Verify before trusting: call `verify_execution_hash` on mcp.ainumbers.co (https://mcp.ainumbers.co/mcp) with the parameter `claimed_hash` set to the returned `execution_hash`, passing the full artifact the run returned (the object containing `policy_parameters` + `output_payload` + `execution_hash`; equivalently `policy_parameters` + `output_payload` with `claimed_hash`), not the bare hash string.
Return the ledger link https://ledger.ainumbers.co/ so a human can re-verify without contacting us.
PII rule: All inputs are processed locally in your browser. No data is transmitted. Do not enter real personal data — use synthetic or anonymised inputs only.
Open the tool with the sample prefilled: https://ainumbers.co/chaingraph/art-62-ap2-payment-receipt-verifier.html#p=v1.H4sIAAAAAAAA_wECAP3_e31Dv6ajAgAAAA