{
  "x402Version": 2,
  "id": 2542,
  "slug": "2542",
  "resource": "https://apiacre.com/v1/developer/x402-preflight",
  "description": "Probe a public endpoint without paying, grade its x402 v2 challenge, check exact-host x402-list presence and traction, and optionally rank licensed market matches with buyer-concentration caveats.",
  "type": "http",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0xa0BFa4f07281c9b248DC3AED2217836BcA24869B",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "50000",
      "maxTimeoutSeconds": 300
    },
    {
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "payTo": "B4CHWQeQn7GDLZD2aW6hpGG2bEseisBFLZYECA3HDLan",
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "amount": "50000",
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "body": {
              "document": "{\"openapi\":\"3.1.0\",\"info\":{\"title\":\"Example\",\"version\":\"1...",
              "format": "json"
            },
            "market_limit": 1,
            "market_query": "audit",
            "method": "POST",
            "url": "https://apiacre.com/v1/developer/openapi-audit"
          },
          "bodyType": "json",
          "method": "POST",
          "type": "http"
        },
        "output": {
          "example": {
            "data": {
              "checkedAt": "2026-08-09T00:00:00+00:00",
              "checks": [
                {
                  "id": "http_402",
                  "message": "Return HTTP 402 before payment.",
                  "passed": true,
                  "severity": "high"
                }
              ],
              "compliant": true,
              "directoryEvidence": {
                "market": {
                  "query": "audit",
                  "returned": 1,
                  "status": "ok",
                  "totalMatches": 31
                },
                "source": {
                  "apiUrl": "https://x402-list.com/api/v1/services",
                  "documentationUrl": "https://x402-list.com/api",
                  "name": "x402 List",
                  "url": "https://x402-list.com"
                },
                "target": {
                  "hostname": "apiacre.com",
                  "matchCount": 1,
                  "matchMethod": "exact_host",
                  "status": "matched"
                },
                "version": "apiacre-x402-directory-evidence/1"
              },
              "elapsedMs": 128,
              "finalUrl": "https://apiacre.com/v1/developer/openapi-audit",
              "grade": "A",
              "gradeVersion": "apiacre-x402-preflight/1",
              "limitations": "One unpaid target request only; no payment is signed and ...",
              "method": "POST",
              "payment": {
                "acceptsCount": 1,
                "network": "eip155:8453",
                "scheme": "exact",
                "version": 2
              },
              "remediation": [],
              "score": 100,
              "statusCode": 402,
              "url": "https://apiacre.com/v1/developer/openapi-audit"
            },
            "meta": {
              "cached": false,
              "duration_ms": 42,
              "next_actions": [],
              "sources": [],
              "warnings": []
            },
            "request_id": "018f1f54-7f38-7ba2-8dc3-5f90272d9f1a",
            "service": "developer.x402-preflight",
            "version": "1"
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "body": {
                "properties": {
                  "body": {
                    "anyOf": [
                      {
                        "type": "object"
                      },
                      {
                        "type": "null"
                      }
                    ]
                  },
                  "market_limit": {
                    "type": "integer"
                  },
                  "market_query": {
                    "anyOf": [
                      {
                        "type": "string"
                      },
                      {
                        "type": "null"
                      }
                    ]
                  },
                  "method": {
                    "enum": [
                      "GET",
                      "POST"
                    ],
                    "type": "string"
                  },
                  "url": {
                    "type": "string"
                  }
                },
                "required": [
                  "url"
                ],
                "type": "object"
              },
              "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": {
                  "data": {
                    "properties": {
                      "checkedAt": {
                        "type": "string"
                      },
                      "checks": {
                        "items": {},
                        "type": "array"
                      },
                      "compliant": {
                        "type": "boolean"
                      },
                      "directoryEvidence": {
                        "type": "object"
                      },
                      "elapsedMs": {
                        "type": "integer"
                      },
                      "finalUrl": {
                        "type": "string"
                      },
                      "grade": {
                        "type": "string"
                      },
                      "gradeVersion": {
                        "type": "string"
                      },
                      "limitations": {
                        "type": "string"
                      },
                      "method": {
                        "type": "string"
                      },
                      "payment": {
                        "type": "object"
                      },
                      "remediation": {
                        "items": {},
                        "type": "array"
                      },
                      "score": {
                        "type": "integer"
                      },
                      "statusCode": {
                        "type": "integer"
                      },
                      "url": {
                        "type": "string"
                      }
                    },
                    "type": "object"
                  },
                  "meta": {
                    "properties": {
                      "cached": {
                        "type": "boolean"
                      },
                      "duration_ms": {
                        "type": "integer"
                      },
                      "next_actions": {
                        "items": {
                          "type": "object"
                        },
                        "type": "array"
                      },
                      "sources": {
                        "items": {
                          "type": "string"
                        },
                        "type": "array"
                      },
                      "warnings": {
                        "items": {
                          "type": "string"
                        },
                        "type": "array"
                      }
                    },
                    "required": [
                      "duration_ms",
                      "cached",
                      "sources",
                      "warnings",
                      "next_actions"
                    ],
                    "type": "object"
                  },
                  "request_id": {
                    "type": "string"
                  },
                  "service": {
                    "type": "string"
                  },
                  "version": {
                    "type": "string"
                  }
                },
                "required": [
                  "request_id",
                  "service",
                  "version",
                  "data",
                  "meta"
                ],
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    },
    "payment-identifier": {
      "info": {
        "required": false
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "id": {
            "maxLength": 128,
            "minLength": 16,
            "pattern": "^[a-zA-Z0-9_-]+$",
            "type": "string"
          },
          "required": {
            "type": "boolean"
          }
        },
        "required": [
          "required"
        ],
        "type": "object"
      }
    }
  },
  "tags": [
    "bazaar",
    "payment-identifier"
  ],
  "sourceHost": "apiacre.com",
  "lastUpdated": "2026-09-01T13:12:51.618Z",
  "quality": {
    "calls30d": 2,
    "uniquePayers30d": 2,
    "lastCalledAt": "2026-09-01T13:12:51.331Z"
  },
  "liveness": {},
  "verified": false,
  "featured": false,
  "provider": {
    "host": "apiacre.com",
    "manifest_name": "apiacre.com",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-09-18T22:00:31.484Z"
  }
}