{
  "x402Version": 2,
  "id": 7664,
  "slug": "7664",
  "resource": "https://goodsong.dev/verify/seller",
  "description": "Verify an x402 seller before paying it: does it exist and respond with a well-formed 402 challenge, is its own declared input/output schema internally consistent, and is its payout address sanctioned? Checked live against the seller itself plus Chainalysis's sanctions oracle and Blockscout (Base payTo addresses only). Confirms the checkable things about a seller check out -- not a guarantee of trustworthiness, which no free source can promise.",
  "type": "http",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0xf3b36a95913eb2676fcdedb2ba6b0c96ade58de1",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "5000",
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "method": "POST",
            "resource_url": "https://api.example.com/paid-endpoint"
          },
          "bodyType": "json",
          "method": "POST",
          "type": "http"
        },
        "output": {
          "example": {
            "canonical": {
              "cairn_conformance": {
                "date": "2026-09-02",
                "report_url": "https://cairnwake.com/r/df2f7a42.html",
                "score": {
                  "inconclusive": 0,
                  "observations": 2,
                  "passed": 16,
                  "total": 16
                },
                "verdict": "PASS"
              },
              "description": "An example x402 service.",
              "network": "eip155:8453",
              "payto": "0x0000000000000000000000000000000000dEaD",
              "resource_url": "https://api.example.com/paid-endpoint",
              "service_name": "example-service",
              "tags": [
                "example"
              ],
              "wallet_age_days": 412.3,
              "wallet_tx_count": 87
            },
            "checks": {
              "declaration_consistent": true,
              "exists": true,
              "payto_sanctioned": false
            },
            "cost": {
              "amount": "0.005",
              "currency": "USDC"
            },
            "evidence": [
              {
                "retrieved_at": "2026-08-30T12:00:00Z",
                "source": "direct_fetch",
                "url": "https://api.example.com/paid-endpoint"
              },
              {
                "retrieved_at": "2026-08-30T12:00:00Z",
                "source": "chainalysis",
                "url": "https://mainnet.base.org"
              },
              {
                "retrieved_at": "2026-08-30T12:00:00Z",
                "source": "blockscout",
                "url": "https://api.blockscout.com/v2/api"
              },
              {
                "retrieved_at": "2026-08-30T12:00:00Z",
                "source": "cairn",
                "url": "https://cairnwake.com/r/df2f7a42.html"
              }
            ],
            "latency_ms": 640,
            "verdict": "confirmed"
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "body": {
                "description": "Provide the exact x402 resource URL; method defaults to POST.",
                "properties": {
                  "method": {
                    "description": "HTTP method that triggers the seller's 402 challenge.",
                    "enum": [
                      "GET",
                      "POST"
                    ],
                    "type": "string"
                  },
                  "resource_url": {
                    "description": "The x402 resource URL to verify.",
                    "type": "string"
                  }
                },
                "required": [
                  "resource_url"
                ]
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "properties": {
                  "canonical": {
                    "type": [
                      "object",
                      "null"
                    ]
                  },
                  "checks": {
                    "type": "object"
                  },
                  "cost": {
                    "type": "object"
                  },
                  "evidence": {
                    "type": "array"
                  },
                  "latency_ms": {
                    "type": "integer"
                  },
                  "verdict": {
                    "enum": [
                      "confirmed",
                      "contradicted",
                      "unknown"
                    ],
                    "type": "string"
                  }
                },
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "tags": [
    "bazaar"
  ],
  "sourceHost": "goodsong.dev",
  "lastUpdated": "2026-09-04T01:27:33.567Z",
  "quality": {
    "calls30d": 2,
    "uniquePayers30d": 1,
    "lastCalledAt": "2026-09-04T01:27:33.416Z"
  },
  "liveness": {},
  "verified": false,
  "featured": false,
  "provider": {
    "host": "goodsong.dev",
    "manifest_name": "goodsong.dev",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-09-18T22:00:31.484Z"
  }
}