{
  "tool_id": "art-31-a2a-x402-extension-mandate-validator",
  "kernel_id": "art-31-a2a-x402-extension-mandate-validator",
  "display_name": "A2A x402-Extension Mandate Validator",
  "tool_version": "1.0.0",
  "mandate_type": "settlement_mandate",
  "purpose": "Validates the A2A x402 extension (Coinbase/MetaMask/Ethereum Foundation) that carries crypto-payment authority inside an AP2 mandate: extension declaration in the A2A agent card, payment-authority scope, settlement-rail binding, exact-scheme x402 PaymentPayload lint, and mandate-to-payment-leg consistency. PASS/WARN/FAIL verdict + execution_hash. Educational/simulation.",
  "control_description": "Validates the A2A x402 extension (Coinbase/MetaMask/Ethereum Foundation) that carries crypto-payment authority inside an AP2 mandate: extension declaration in the A2A agent card, payment-authority scope, settlement-rail binding, exact-scheme x402 PaymentPayload lint, and mandate-to-payment-leg consistency. PASS/WARN/FAIL verdict + execution_hash. Educational/simulation.",
  "declared_inputs": [
    "art-03-x402-settlement-modeler"
  ],
  "declared_outputs": [
    "art-30-agent-commerce-conformance-validator",
    "cry-05-agent-action-audit-trail-aggregator",
    "ptg-01-ap2-prompt-template-generator"
  ],
  "kernel_digest": "sha256:8136ed46e50029be28e18bd1ec82e60c057b1b12a749df5dc4f847a012b5dddf",
  "trust_label": "deferred -- deterministic source published, zkVM proof not yet generated",
  "data_vintage": "2026-07-10",
  "last_validated": "2026-07-10",
  "conformance_fixtures_vendored": true,
  "compute_proof_ready": "ready",
  "wave": 6,
  "source_url": "https://ainumbers.co/chaingraph/art-31-a2a-x402-extension-mandate-validator.html",
  "generated_at": "2026-07-25T20:02:55.601Z"
}