x402 payment requirement conformance derived

{
  "input": {
    "body": {
      "challenge": {
        "accepts": [
          {
            "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
            "payTo": "0xa1b2c30000000000000000000000000000009f8e",
            "amount": "5000",
            "scheme": "exact",
            "network": "eip155:8453"
          },
          {
            "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
            "payTo": "0xa1b2c30000000000000000000000000000009f8e",
            "amount": "25000",
            "scheme": "exact",
            "network": "eip155:8453"
          }
        ],
        "resource": {
          "url": "https://api.merchant.test/v1/other",
          "mimeType": "application/json",
          "description": "Scoring"
        },
        "extensions": {
          "bazaar": {
            "schema": {
              "properties": {
                "input": {
                  "type": "object"
                }
              }
            }
          }
        },
        "x402Version": 2
      },
      "expected_url": "https://api.merchant.test/v1/score"
    },
    "type": "http",
    "method": "POST",
    "bodyType": "json"
  },
  "output": {
    "type": "json",
    "example": {
      "limits": {
        "maxAssets": 100,
        "maxAccepts": 20,
        "maxFindings": 500,
        "maxNetworks": 50,
        "maxResources": 500,
        "maxChallenges": 200
      },
      "passed": false,
      "accepts": [
        {
          "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
          "amount": "5000",
          "pay_to": "0xa1b2c30000000000000000000000000000009f8e",
          "scheme": "exact",
          "network": "eip155:8453"
        },
        {
          "asset": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
          "amount": "25000",
          "pay_to": "0xa1b2c30000000000000000000000000000009f8e",
          "scheme": "exact",
          "network": "eip155:8453"
        }
      ],
      "version": 2,
      "complete": true,
      "findings": [
        {
          "code": "OUTPUT_SCHEMA_MISSING",
          "detail": "OUTPUT_SCHEMA_MISSING does not stop a payment but makes the call harder to construct correctly.",
          "severity": "advisory"
        },
        {
          "code": "RESOURCE_NOT_BOUND_TO_ENDPOINT",
          "detail": "The challenge names https://api.merchant.test/v1/other and it was served from https://api.merchant.test/v1/score, so paying it would satisfy a requirement for a different resource.",
          "severity": "blocking"
        },
        {
          "code": "OUTPUT_SCHEMA_MISSING",
          "detail": "No output schema is declared, so a caller cannot type the result.",
          "severity": "advisory"
        }
      ],
      "request_id": "example-request",
      "service_id": "x402_payment_requirement_conformance",
      "assumptions": [
        "Nothing is fetched and nothing is paid. payment_sent is false on every response and is a constant, not a measurement.",
        "A blocking defect stops a payment being constructed at all; an advisory one makes the call harder to get right. Only the first kind means do not attempt this.",
        "payable_now is a statement about the challenge, never a promise that a payment would succeed."
      ],
      "limitations": [
        "Conformance of the challenge supplied. Whether the endpoint honours it, whether the price is fair, and whether the payee is who they claim are all outside what a challenge can show.",
        "Without expected_url the resource binding is not checked, and payable_now is false in that case because an unchecked binding cannot read as safe."
      ],
      "observed_at": "2026-10-02T00:00:00.000Z",
      "payable_now": false,
      "not_examined": [],
      "payment_sent": false,
      "resource_url": "https://api.merchant.test/v1/other",
      "finding_count": 4,
      "declared_input": {
        "type": "object"
      },
      "declared_output": null,
      "service_version": "1.0.0",
      "findings_by_code": {
        "ACCEPTS_PRICE_SPREAD": 1,
        "OUTPUT_SCHEMA_MISSING": 2,
        "RESOURCE_NOT_BOUND_TO_ENDPOINT": 1
      },
      "advisory_warnings": [
        "OUTPUT_SCHEMA_MISSING"
      ],
      "blocking_warnings": [],
      "resource_is_object": true
    }
  }
}