Verify that an AI-agent payment produced the expected service response and audit evidence

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x60c402878EfcEcAe5733A88075328Aa2320C39BE",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "30000",
    "maxTimeoutSeconds": 300
  }
]

{
  "bazaar": {
    "discoverable": true,
    "info": {
      "input": {
        "body": {
          "amount": "0.03",
          "delivery_status": "delivered",
          "evidence_ids": [
            "ev_001"
          ],
          "paid_endpoint": "/api/example",
          "payment_asset": "USDC",
          "payment_reference": "pay_123",
          "service_response_received": true
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      },
      "output": {
        "example": {
          "audit_ready": true,
          "payment_evidence_status": "ok",
          "payment_response_matched": true,
          "recommended_next_step": "store_evidence",
          "requires_human_review": false
        },
        "type": "json"
      }
    },
    "schema": {
      "properties": {
        "audit_ready": {
          "type": "boolean"
        },
        "payment_evidence_status": {
          "type": "string"
        },
        "payment_response_matched": {
          "type": "boolean"
        },
        "recommended_next_step": {
          "type": "string"
        },
        "requires_human_review": {
          "type": "boolean"
        }
      },
      "type": "object"
    }
  }
}

curl "https://ai-agent-payment-safety-stack.onrender.com/api/payment-evidence/check"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

const res = await fetch("https://ai-agent-payment-safety-stack.onrender.com/api/payment-evidence/check");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

import httpx
res = httpx.get("https://ai-agent-payment-safety-stack.onrender.com/api/payment-evidence/check")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header