{
  "x402Version": 2,
  "id": 54173,
  "slug": "54173",
  "resource": "https://machinemint-native-x402-production.up.railway.app/v1/base-preflight",
  "description": "Check an unsigned Base mainnet transaction before signing or broadcasting. Simulates with eth_call, estimates gas, checks sender balance and target bytecode, decodes supported token transfers and approvals, flags unlimited approvals and suspicious transaction shapes, and returns PASS, REVIEW, or FAIL. Never signs or broadcasts.",
  "type": "http",
  "resourceType": "Travel",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0xe43e47Dd6b779fE9e591586A3e1cBA00C2f36C80",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "10000",
      "amountUsd": 0.01,
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "properties": {
      "example": {
        "properties": {
          "action": {
            "type": "object"
          },
          "canonical_endpoint": {
            "type": "string"
          },
          "chain": {
            "type": "object"
          },
          "gas": {
            "type": "object"
          },
          "provenance": {
            "type": "object"
          },
          "reason_codes": {
            "items": {
              "type": "string"
            },
            "type": "array"
          },
          "request_mode": {
            "enum": [
              "provided_transaction",
              "marketplace_verification_sample"
            ],
            "type": "string"
          },
          "risks": {
            "items": {
              "type": "object"
            },
            "type": "array"
          },
          "sender": {
            "type": "object"
          },
          "service": {
            "const": "machinemint.evm.preflight"
          },
          "simulation": {
            "type": "object"
          },
          "target": {
            "type": "object"
          },
          "transaction": {
            "type": "object"
          },
          "verdict": {
            "enum": [
              "PASS",
              "REVIEW",
              "FAIL"
            ],
            "type": "string"
          }
        },
        "required": [
          "service",
          "verdict"
        ],
        "type": "object"
      },
      "type": {
        "type": "string"
      }
    },
    "required": [
      "type"
    ],
    "type": "object"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "method": "GET",
          "queryParams": {
            "data": "0x",
            "from": "0x4200000000000000000000000000000000000006",
            "to": "0x1111111111111111111111111111111111111111",
            "value": "0"
          },
          "type": "http"
        },
        "output": {
          "example": {
            "canonical_endpoint": "/v1/base-preflight",
            "chain": {
              "chain_id": 8453,
              "name": "base"
            },
            "gas": {
              "estimated": true
            },
            "reason_codes": [],
            "request_mode": "marketplace_verification_sample",
            "risks": [],
            "sender": {
              "sufficient": true
            },
            "service": "machinemint.evm.preflight",
            "simulation": {
              "ok": true
            },
            "verdict": "PASS"
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "method": {
                "enum": [
                  "GET"
                ],
                "type": "string"
              },
              "queryParams": {
                "additionalProperties": false,
                "description": "Optional GET query parameters. Omit all fields to request the deterministic marketplace-verification sample.",
                "properties": {
                  "chain": {
                    "default": "base",
                    "enum": [
                      "base",
                      "base-mainnet"
                    ],
                    "type": "string"
                  },
                  "data": {
                    "default": "0x",
                    "description": "0x-prefixed calldata.",
                    "pattern": "^0x(?:[0-9a-fA-F]{2})*$",
                    "type": "string"
                  },
                  "from": {
                    "description": "Sender wallet for the unsigned transaction.",
                    "pattern": "^0x[0-9a-fA-F]{40}$",
                    "type": "string"
                  },
                  "to": {
                    "description": "Target contract or account.",
                    "pattern": "^0x[0-9a-fA-F]{40}$",
                    "type": "string"
                  },
                  "value": {
                    "default": "0",
                    "description": "Native value in wei.",
                    "type": [
                      "string",
                      "integer"
                    ]
                  }
                },
                "type": "object"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "properties": {
                  "action": {
                    "type": "object"
                  },
                  "canonical_endpoint": {
                    "type": "string"
                  },
                  "chain": {
                    "type": "object"
                  },
                  "gas": {
                    "type": "object"
                  },
                  "provenance": {
                    "type": "object"
                  },
                  "reason_codes": {
                    "items": {
                      "type": "string"
                    },
                    "type": "array"
                  },
                  "request_mode": {
                    "enum": [
                      "provided_transaction",
                      "marketplace_verification_sample"
                    ],
                    "type": "string"
                  },
                  "risks": {
                    "items": {
                      "type": "object"
                    },
                    "type": "array"
                  },
                  "sender": {
                    "type": "object"
                  },
                  "service": {
                    "const": "machinemint.evm.preflight"
                  },
                  "simulation": {
                    "type": "object"
                  },
                  "target": {
                    "type": "object"
                  },
                  "transaction": {
                    "type": "object"
                  },
                  "verdict": {
                    "enum": [
                      "PASS",
                      "REVIEW",
                      "FAIL"
                    ],
                    "type": "string"
                  }
                },
                "required": [
                  "service",
                  "verdict"
                ],
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "tags": [
    "bazaar"
  ],
  "sourceHost": "machinemint-native-x402-production.up.railway.app",
  "lastUpdated": "2026-10-08T06:26:51.578Z",
  "quality": {
    "calls30d": 4,
    "uniquePayers30d": 4,
    "lastCalledAt": "2026-10-08T06:26:51.349Z"
  },
  "metadata": {
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "data": "0x",
              "from": "0x4200000000000000000000000000000000000006",
              "to": "0x1111111111111111111111111111111111111111",
              "value": "0"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "canonical_endpoint": "/v1/base-preflight",
              "chain": {
                "chain_id": 8453,
                "name": "base"
              },
              "gas": {
                "estimated": true
              },
              "reason_codes": [],
              "request_mode": "marketplace_verification_sample",
              "risks": [],
              "sender": {
                "sufficient": true
              },
              "service": "machinemint.evm.preflight",
              "simulation": {
                "ok": true
              },
              "verdict": "PASS"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "additionalProperties": false,
                  "description": "Optional GET query parameters. Omit all fields to request the deterministic marketplace-verification sample.",
                  "properties": {
                    "chain": {
                      "default": "base",
                      "enum": [
                        "base",
                        "base-mainnet"
                      ],
                      "type": "string"
                    },
                    "data": {
                      "default": "0x",
                      "description": "0x-prefixed calldata.",
                      "pattern": "^0x(?:[0-9a-fA-F]{2})*$",
                      "type": "string"
                    },
                    "from": {
                      "description": "Sender wallet for the unsigned transaction.",
                      "pattern": "^0x[0-9a-fA-F]{40}$",
                      "type": "string"
                    },
                    "to": {
                      "description": "Target contract or account.",
                      "pattern": "^0x[0-9a-fA-F]{40}$",
                      "type": "string"
                    },
                    "value": {
                      "default": "0",
                      "description": "Native value in wei.",
                      "type": [
                        "string",
                        "integer"
                      ]
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "action": {
                      "type": "object"
                    },
                    "canonical_endpoint": {
                      "type": "string"
                    },
                    "chain": {
                      "type": "object"
                    },
                    "gas": {
                      "type": "object"
                    },
                    "provenance": {
                      "type": "object"
                    },
                    "reason_codes": {
                      "items": {
                        "type": "string"
                      },
                      "type": "array"
                    },
                    "request_mode": {
                      "enum": [
                        "provided_transaction",
                        "marketplace_verification_sample"
                      ],
                      "type": "string"
                    },
                    "risks": {
                      "items": {
                        "type": "object"
                      },
                      "type": "array"
                    },
                    "sender": {
                      "type": "object"
                    },
                    "service": {
                      "const": "machinemint.evm.preflight"
                    },
                    "simulation": {
                      "type": "object"
                    },
                    "target": {
                      "type": "object"
                    },
                    "transaction": {
                      "type": "object"
                    },
                    "verdict": {
                      "enum": [
                        "PASS",
                        "REVIEW",
                        "FAIL"
                      ],
                      "type": "string"
                    }
                  },
                  "required": [
                    "service",
                    "verdict"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    }
  },
  "liveness": {
    "reliability": null
  },
  "verified": false,
  "featured": false,
  "provider": {
    "host": "machinemint-native-x402-production.up.railway.app",
    "manifest_name": "machinemint-native-x402-production.up.railway.app",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-10-14T01:15:01.050Z"
  },
  "exampleResponse": {
    "example": {
      "action": {},
      "canonical_endpoint": "string",
      "chain": {},
      "gas": {},
      "provenance": {},
      "reason_codes": [
        "string"
      ],
      "request_mode": "provided_transaction",
      "risks": [
        {}
      ],
      "sender": {},
      "service": null,
      "simulation": {},
      "target": {},
      "transaction": {},
      "verdict": "PASS"
    },
    "type": "string"
  }
}