Evidence row 1508264

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://apiaudit.madebydevx.com/v1/quick"
    ]
  ],
  "name": "apiaudit.madebydevx.com/v1/quick",
  "owner_address": "0xb3cddccee6b150c8effd55b961afc0ecefe7f247",
  "raw": {
    "accepts": [
      {
        "amount": "90000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xB3cDDccEe6B150c8efFD55B961afc0Ecefe7f247",
        "scheme": "exact"
      }
    ],
    "description": "Quick API health check for agents: send one public API endpoint URL and get a 3-sample spot check for $0.09 USDC on Base: grade A-F, score, production-ready yes/no, median/p95 latency, success rate and the top 3 issues with concrete fixes (security headers, CORS, HTTPS redirect, JSON consistency). Unreachable targets not charged. Full 10-sample audit with every finding and cert expiry: POST /v1/audit ($9). By DevX.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "method": "GET",
              "url": "https://jsonplaceholder.typicode.com/todos/1"
            },
            "bodyType": "json",
            "discoverable": true,
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "operation_id": "5d0c7a3e-1f2b-4c6d-8e9f-0a1b2c3d4e5f",
              "payment": {
                "amount_raw": "90000",
                "network": "eip155:8453",
                "status": "paid",
                "tx_hash": "0x0000000000000000000000000000000000000000000000000000000000000000"
              },
              "result": {
                "full_report": {
                  "price_usd": "9.00",
                  "url": "/v1/audit"
                },
                "latency_ms": {
                  "ttfb_median": 5,
                  "ttfb_p95": 12
                },
                "tier": "quick",
                "top_issues": [
                  {
                    "fix": "Add: Strict-Transport-Security: max-age=31536000; includeSubDomains",
                    "severity": "medium",
                    "title": "No HSTS header"
                  },
                  {
                    "fix": "Allow-list trusted origins; never reflect the Origin header when credentials are allowed.",
                    "severity": "medium",
                    "title": "CORS reflects any Origin with credentials"
                  },
                  {
                    "fix": "Redirect (301/308) or reject (403/426) plain HTTP; combine with HSTS.",
                    "severity": "medium",
                    "title": "Plain HTTP is served, not redirected"
                  }
                ],
                "verdict": {
                  "grade": "C",
                  "label": "needs work before production",
                  "production_ready": false,
                  "score": 70
                }
              },
              "status": "paid"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "additionalProperties": false,
                  "properties": {
                    "body": {
                      "description": "Optional probe body for POST (string or JSON, max 16 KB)"
                    },
                    "expect_status": {
                      "description": "Status code that counts as success (default: any status < 400)",
                      "maximum": 599,
                      "minimum": 100,
                      "type": "integer"
                    },
                    "headers": {
                      "additionalProperties": {
                        "maxLength": 1024,
                        "type": "string"
                      },
                      "description": "Optional request headers (e.g. authorization) used only for the probe; never stored or echoed",
                      "type": "object"
                    },
                    "method": {
                      "description": "Probe method (default GET). POST is sent once per sample.",
                      "enum": [
                        "GET",
                        "HEAD",
                        "POST",
                        "OPTIONS"
                      ],
                      "type": "string"
                    },
                    "requestKey": {
                      "description": "Optional idempotency key: same payer + requestKey + input within 7 days returns the stored report without a second charge.",
                      "maxLength": 128,
                      "minLength": 8,
                      "pattern": "^[A-Za-z0-9][A-Za-z0-9._:-]{7,127}$",
                      "type": "string"
                    },
                    "url": {
                      "description": "Public http(s) API endpoint to audit (only this URL is probed)",
                      "format": "uri",
                      "maxLength": 2048,
                      "type": "string"
                    }
                  },
                  "required": [
                    "url"
                  ],
                  "type": "object"
                },
                "bodyType": {
                  "enum": [
                    "json"
                  ],
                  "type": "string"
                },
                "discoverable": {
                  "type": "boolean"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1792674330/bazaar-icons/e0e6fd42800bc2b7.png",
    "lastUpdated": "2026-10-31T00:02:12.29Z",
    "quality": {
      "l30DaysTotalCalls": 4,
      "l30DaysUniquePayers": 3,
      "lastCalledAt": "2026-10-31T00:02:12.054Z"
    },
    "resource": "https://apiaudit.madebydevx.com/v1/quick",
    "tags": [
      "api-health",
      "quick-check",
      "security-headers",
      "latency",
      "devtools"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Quick API health check for agents: send one public API endpoint URL and get a 3-sample spot check for $0.09 USDC on Base: grade A-F, score, production-ready yes/no, median/p95 latency, success rate and the top 3 issues with concrete fixes (security headers, CORS, HTTPS redirect, JSON consistency). Unreachable targets not charged. Full 10-sample audit with every finding and cert expiry: POST /v1/audit ($9). By DevX."
}

What the leaf hashes

{"body":"3afecfa14581476be5b78c240fa20da6367c08884b4161e6ef1d60b0b5a6680b","id":1508264,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793472709130451,"prev":1262535,"subject":"x402_bazaar:https://apiaudit.madebydevx.com/v1/quick","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-31 (246033 rows).

1. 0x4b8a271a2c8e16b59fc0dc4f53da6f86dc973be0b826ba114854f19930e508b7
2. 0xf39167230e2ee0e9177c277c95ec88a6ca57f2c7e8ab9ffdb84987f9ac954ee7
3. 0x74634ea6ae4f290da1bce4847be974ec199e173d41516f87e2b86314b8b1472d
4. 0x047f6c268c9ff5a97249caf606cf636d8cab5181453141f2f16565cbdf5a06b9
5. 0xff217f6ce898d51939db2815c7967a723c63e4de278a469878fb87fbb7cd0f8d
6. 0x4de6f42dcbe9bf91c3797ffb192909eac4c8455faec8fa80de929753933d37d2
7. 0xfd3a53e2ae7662f963464b0e73853e725203bd4b11134630363adf0a64afa90a
8. 0x4e11d13675ce40a1ac9a72282a116f7cc09487ca578058f23330fe5b8e09ecc4
9. 0xd3fe249e86f04dcd635151cca6b17b70be9dfa5dc38bfce0ba256417996d3a2f
10. 0xef089b59747297d575cea7ae0af1d1652ecca5193c16f3ab2e92d8acbcde40c9
11. 0x32aaa8a78f6103dd70a75e181918cda1aa711cbd6c2cabc0f9f5ad4cc6fc7433
12. 0x5a1b3d3b8340f3a758827aed63fed285c823bca32427c40c4687a3d153601c85
13. 0xe9c4303dc739b3a38473373ace0be2d0380fe87c373514f87ecf64e4a134918e
14. 0xc248f3640ff2a9c77f3134397896f3ef7b260859179e2912c528542dff5a29d2
15. 0x37f0ccf90cd9ba8759ef0154382593820880794592760020f095a3628e43fc3f
16. 0xad4540f06e3fdfe46524d8592f8d854d4849e16217bc047eaf024f0abebe34b0
17. 0xa00a931d72706fa2402bfc9b441a12eb7c6a61ff42a542916106e3637177f101
18. 0x59f83f7228f07febe2780660e422e171b0359b8aa031ee3be07e991118130c15

Day root

0x24463725d1c0d9894bd6123691d532547aaa79f0762c0e45aa6a68acf1fd71ab

Chained

0x7d4824ff313dee7252a46f9d5c37b452851deb6c9f24a40c2f74ee0e53c82980

Published

On Arc Testnet, block 70093156: 0xedb7b832f4ebf6781b5ecd2ed241c435b862f4d3761541fa31adc1831b8c44a0