{
  "x402Version": 2,
  "id": 37526,
  "slug": "37526",
  "resource": "https://api.vextorium.com/construir-transaccion-pago",
  "description": "Build an EVM transaction ready to sign (never signed or sent): native transfer, ERC-20 transfer or ERC-20 approve, with to, data, value, nonce, chainId, estimated gas and current EIP-1559 fees, plus a simulation that warns if it would revert and the estimated cost.",
  "type": "http",
  "serviceName": "Vextorium",
  "resourceType": "Blockchain Data",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "4000",
      "amountUsd": 0.004,
      "maxTimeoutSeconds": 300
    },
    {
      "scheme": "exact",
      "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
      "payTo": "HcjfmZLgWRZzwj4deEiS7pewc4KBYSw39mW5nTyt3pz2",
      "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
      "amount": "4000",
      "amountUsd": 0.004,
      "maxTimeoutSeconds": 300
    },
    {
      "scheme": "exact",
      "network": "eip155:137",
      "payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
      "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
      "amount": "4000",
      "amountUsd": 0.004,
      "maxTimeoutSeconds": 300
    },
    {
      "scheme": "exact",
      "network": "eip155:10",
      "payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
      "asset": "0x0b2C639c533813f4Aa9D7837CAf62653d097Ff85",
      "amount": "4000",
      "maxTimeoutSeconds": 604900
    },
    {
      "scheme": "exact",
      "network": "eip155:5042",
      "payTo": "0xb9f06D2734B7E9D7b21B64C4D8b95bd774b71aCf",
      "asset": "0x3600000000000000000000000000000000000000",
      "amount": "4000",
      "maxTimeoutSeconds": 604900
    }
  ],
  "outputSchema": {
    "properties": {
      "example": {
        "properties": {
          "accion": {
            "type": [
              "string",
              "null"
            ]
          },
          "coste_estimado_nativo": {
            "type": [
              "number",
              "null"
            ]
          },
          "coste_estimado_usd": {
            "type": [
              "number",
              "null"
            ]
          },
          "decimales": {
            "type": [
              "number",
              "null"
            ]
          },
          "gas_estimado": {
            "type": [
              "number",
              "null"
            ]
          },
          "nota": {
            "type": [
              "string",
              "null"
            ]
          },
          "red": {
            "type": [
              "string",
              "null"
            ]
          },
          "simulacion": {
            "type": [
              "string",
              "null"
            ]
          },
          "token": {
            "type": [
              "string",
              "null"
            ]
          },
          "transaccion": {
            "properties": {
              "chainId": {
                "type": [
                  "string",
                  "null"
                ]
              },
              "data": {
                "type": [
                  "string",
                  "null"
                ]
              },
              "from": {
                "type": [
                  "string",
                  "null"
                ]
              },
              "gas": {
                "type": [
                  "string",
                  "null"
                ]
              },
              "maxFeePerGas": {
                "type": [
                  "string",
                  "null"
                ]
              },
              "maxPriorityFeePerGas": {
                "type": [
                  "string",
                  "null"
                ]
              },
              "nonce": {
                "type": [
                  "string",
                  "null"
                ]
              },
              "to": {
                "type": [
                  "string",
                  "null"
                ]
              },
              "type": {
                "type": [
                  "string",
                  "null"
                ]
              },
              "value": {
                "type": [
                  "string",
                  "null"
                ]
              }
            },
            "type": [
              "object",
              "null"
            ]
          }
        },
        "type": [
          "object",
          "null"
        ]
      },
      "type": {
        "type": "string"
      }
    },
    "required": [
      "type"
    ],
    "type": "object"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "accion": "transferencia_token",
            "cantidad": 1,
            "desde": "0xd8dA6BF26964aF9D7eed9e03E53415D37aA96045",
            "para": "0x9b9B3F22BEBD1e3E528C2759a2ca34cD2e0184A1",
            "red": "base",
            "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
          },
          "bodyType": "json",
          "method": "POST",
          "type": "http"
        },
        "output": {
          "example": {
            "accion": "transferencia_token",
            "coste_estimado_nativo": 3.779e-7,
            "coste_estimado_usd": 0.001013,
            "decimales": 6,
            "gas_estimado": 62989,
            "nota": "Transacción sin firmar: fírmala con tu cartera. Vextorium nunca ve claves privadas. Revisa destinatario y cantidad antes de firmar.",
            "red": "base",
            "simulacion": "ok",
            "token": "USDC",
            "transaccion": {
              "chainId": "0x2105",
              "data": "0xa9059cbb0000000000000000000000009b9b3f22bebd1e3e528c2759a2ca34cd2e0184a100000000000000000000000000000000000000000000000000000000000f4240",
              "from": "0xd8dA6BF26964aF9D7eed9e03E53415D37aA96045",
              "gas": "0x12742",
              "maxFeePerGas": "0xa7d8c0",
              "maxPriorityFeePerGas": "0xf4240",
              "nonce": "0x46",
              "to": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
              "type": "0x2",
              "value": "0x0"
            }
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "body": {
                "properties": {
                  "accion": {
                    "enum": [
                      "transferencia_nativa",
                      "transferencia_token",
                      "aprobar_token"
                    ],
                    "type": "string"
                  },
                  "cantidad": {
                    "type": "number"
                  },
                  "desde": {
                    "type": "string"
                  },
                  "para": {
                    "type": "string"
                  },
                  "red": {
                    "type": "string"
                  },
                  "token": {
                    "type": "string"
                  }
                },
                "required": [
                  "desde",
                  "accion",
                  "para",
                  "cantidad"
                ]
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              },
              "method": {
                "enum": [
                  "POST"
                ],
                "type": "string"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "properties": {
                  "accion": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "coste_estimado_nativo": {
                    "type": [
                      "number",
                      "null"
                    ]
                  },
                  "coste_estimado_usd": {
                    "type": [
                      "number",
                      "null"
                    ]
                  },
                  "decimales": {
                    "type": [
                      "number",
                      "null"
                    ]
                  },
                  "gas_estimado": {
                    "type": [
                      "number",
                      "null"
                    ]
                  },
                  "nota": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "red": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "simulacion": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "token": {
                    "type": [
                      "string",
                      "null"
                    ]
                  },
                  "transaccion": {
                    "properties": {
                      "chainId": {
                        "type": [
                          "string",
                          "null"
                        ]
                      },
                      "data": {
                        "type": [
                          "string",
                          "null"
                        ]
                      },
                      "from": {
                        "type": [
                          "string",
                          "null"
                        ]
                      },
                      "gas": {
                        "type": [
                          "string",
                          "null"
                        ]
                      },
                      "maxFeePerGas": {
                        "type": [
                          "string",
                          "null"
                        ]
                      },
                      "maxPriorityFeePerGas": {
                        "type": [
                          "string",
                          "null"
                        ]
                      },
                      "nonce": {
                        "type": [
                          "string",
                          "null"
                        ]
                      },
                      "to": {
                        "type": [
                          "string",
                          "null"
                        ]
                      },
                      "type": {
                        "type": [
                          "string",
                          "null"
                        ]
                      },
                      "value": {
                        "type": [
                          "string",
                          "null"
                        ]
                      }
                    },
                    "type": [
                      "object",
                      "null"
                    ]
                  }
                },
                "type": [
                  "object",
                  "null"
                ]
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "tags": [
    "transaction",
    "evm",
    "unsigned-tx",
    "erc20",
    "wallet",
    "bazaar"
  ],
  "sourceHost": "api.vextorium.com",
  "lastUpdated": "2026-10-06T01:49:12.463Z",
  "quality": {
    "calls30d": 2,
    "uniquePayers30d": 2,
    "lastCalledAt": "2026-10-06T01:49:11.985Z"
  },
  "metadata": {
    "serviceName": "Vextorium",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "accion": "transferencia_token",
              "cantidad": 1,
              "desde": "0xd8dA6BF26964aF9D7eed9e03E53415D37aA96045",
              "para": "0x9b9B3F22BEBD1e3E528C2759a2ca34cD2e0184A1",
              "red": "base",
              "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "accion": "transferencia_token",
              "coste_estimado_nativo": 3.779e-7,
              "coste_estimado_usd": 0.001013,
              "decimales": 6,
              "gas_estimado": 62989,
              "nota": "Transacción sin firmar: fírmala con tu cartera. Vextorium nunca ve claves privadas. Revisa destinatario y cantidad antes de firmar.",
              "red": "base",
              "simulacion": "ok",
              "token": "USDC",
              "transaccion": {
                "chainId": "0x2105",
                "data": "0xa9059cbb0000000000000000000000009b9b3f22bebd1e3e528c2759a2ca34cd2e0184a100000000000000000000000000000000000000000000000000000000000f4240",
                "from": "0xd8dA6BF26964aF9D7eed9e03E53415D37aA96045",
                "gas": "0x12742",
                "maxFeePerGas": "0xa7d8c0",
                "maxPriorityFeePerGas": "0xf4240",
                "nonce": "0x46",
                "to": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
                "type": "0x2",
                "value": "0x0"
              }
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "accion": {
                      "enum": [
                        "transferencia_nativa",
                        "transferencia_token",
                        "aprobar_token"
                      ],
                      "type": "string"
                    },
                    "cantidad": {
                      "type": "number"
                    },
                    "desde": {
                      "type": "string"
                    },
                    "para": {
                      "type": "string"
                    },
                    "red": {
                      "type": "string"
                    },
                    "token": {
                      "type": "string"
                    }
                  },
                  "required": [
                    "desde",
                    "accion",
                    "para",
                    "cantidad"
                  ]
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "accion": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "coste_estimado_nativo": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "coste_estimado_usd": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "decimales": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "gas_estimado": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "nota": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "red": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "simulacion": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "token": {
                      "type": [
                        "string",
                        "null"
                      ]
                    },
                    "transaccion": {
                      "properties": {
                        "chainId": {
                          "type": [
                            "string",
                            "null"
                          ]
                        },
                        "data": {
                          "type": [
                            "string",
                            "null"
                          ]
                        },
                        "from": {
                          "type": [
                            "string",
                            "null"
                          ]
                        },
                        "gas": {
                          "type": [
                            "string",
                            "null"
                          ]
                        },
                        "maxFeePerGas": {
                          "type": [
                            "string",
                            "null"
                          ]
                        },
                        "maxPriorityFeePerGas": {
                          "type": [
                            "string",
                            "null"
                          ]
                        },
                        "nonce": {
                          "type": [
                            "string",
                            "null"
                          ]
                        },
                        "to": {
                          "type": [
                            "string",
                            "null"
                          ]
                        },
                        "type": {
                          "type": [
                            "string",
                            "null"
                          ]
                        },
                        "value": {
                          "type": [
                            "string",
                            "null"
                          ]
                        }
                      },
                      "type": [
                        "object",
                        "null"
                      ]
                    }
                  },
                  "type": [
                    "object",
                    "null"
                  ]
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    }
  },
  "liveness": {
    "reliability": null
  },
  "verified": false,
  "featured": false,
  "provider": {
    "host": "api.vextorium.com",
    "manifest_name": "api.vextorium.com",
    "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": {
      "accion": "string",
      "coste_estimado_nativo": 0,
      "coste_estimado_usd": 0,
      "decimales": 0,
      "gas_estimado": 0,
      "nota": "string",
      "red": "string",
      "simulacion": "string",
      "token": "string",
      "transaccion": {
        "chainId": "string",
        "data": "string",
        "from": "string",
        "gas": "string",
        "maxFeePerGas": "string",
        "maxPriorityFeePerGas": "string",
        "nonce": "string",
        "to": "string",
        "type": "string",
        "value": "string"
      }
    },
    "type": "string"
  }
}