{
  "x402Version": 2,
  "id": 33179,
  "slug": "33179",
  "resource": "https://paycheck.hectichustle.workers.dev/address/check",
  "description": "Address-poisoning check before you send USDC on Base. Body {from, to}: scans the sender's recent Base USDC transfers for addresses that share to's first 4 and last 4 hex chars but differ, plus dust or zero-value transfers from them. Returns risk low/medium/high, lookalikes with counts and sample tx, seenBefore (have you really paid 'to' before), reasons, and honest coverage stats (window, % scanned, complete).",
  "type": "http",
  "serviceName": "x402 Address Poisoning Check",
  "resourceType": "Security",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0x509E55c4F898B43C856Fb0E51048B1b7bFBC9eDE",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "1000",
      "amountUsd": 0.001,
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "properties": {
      "example": {
        "properties": {
          "contacts": {
            "description": "Only present when contacts were sent",
            "properties": {
              "checked": {
                "type": "integer"
              },
              "inContacts": {
                "type": "boolean"
              },
              "lookalikes": {
                "items": {
                  "properties": {
                    "contact": {
                      "type": "string"
                    },
                    "prefixMatch": {
                      "type": "integer"
                    },
                    "suffixMatch": {
                      "type": "integer"
                    }
                  },
                  "type": "object"
                },
                "type": "array"
              }
            },
            "type": "object"
          },
          "coverage": {
            "properties": {
              "complete": {
                "type": "boolean"
              },
              "coveragePct": {
                "type": "number"
              },
              "rpcCalls": {
                "type": "integer"
              },
              "scannedFrom": {
                "type": "integer"
              },
              "scannedTo": {
                "type": "integer"
              },
              "transfersSeen": {
                "type": "integer"
              },
              "windowBlocks": {
                "type": "integer"
              }
            },
            "type": "object"
          },
          "lookalikes": {
            "items": {
              "properties": {
                "address": {
                  "type": "string"
                },
                "dustTransfers": {
                  "type": "integer"
                },
                "inbound": {
                  "type": "integer"
                },
                "lastBlock": {
                  "type": "integer"
                },
                "outbound": {
                  "type": "integer"
                },
                "pattern": {
                  "enum": [
                    "dust_or_zero_value",
                    "lookalike_counterparty"
                  ],
                  "type": "string"
                },
                "realOut": {
                  "type": "integer"
                },
                "sampleTx": {
                  "type": "string"
                }
              },
              "type": "object"
            },
            "type": "array"
          },
          "reasons": {
            "items": {
              "type": "string"
            },
            "type": "array"
          },
          "risk": {
            "enum": [
              "low",
              "medium",
              "high"
            ],
            "type": "string"
          },
          "seenBefore": {
            "type": "boolean"
          }
        },
        "required": [
          "risk",
          "lookalikes",
          "seenBefore",
          "coverage"
        ],
        "type": "object"
      },
      "type": {
        "type": "string"
      }
    },
    "required": [
      "type"
    ],
    "type": "object"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "from": "0x9D42EbA8868CFd38A50Ba615ee0cf903F1BBeCE9",
            "to": "0x509E55c4F898B43C856Fb0E51048B1b7bFBC9eDE"
          },
          "bodyType": "json",
          "method": "POST",
          "type": "http"
        },
        "output": {
          "example": {
            "coverage": {
              "complete": false,
              "coveragePct": 38,
              "rpcCalls": 47,
              "scannedFrom": 52468176,
              "scannedTo": 52518176,
              "transfersSeen": 19,
              "windowBlocks": 50000
            },
            "from": "0x9d42eba8868cfd38a50ba615ee0cf903f1bbece9",
            "lookalikes": [],
            "reasons": [
              "you have paid 'to' before and no lookalikes found"
            ],
            "risk": "low",
            "seenBefore": true,
            "to": "0x509e55c4f898b43c856fb0e51048b1b7bfbc9ede"
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "body": {
                "properties": {
                  "contacts": {
                    "description": "Optional: up to 50 addresses you already trust (address book). 'to' is compared offline against them, so a lookalike of a contact is flagged even outside the scanned history.",
                    "items": {
                      "pattern": "^0x[0-9a-fA-F]{40}$",
                      "type": "string"
                    },
                    "maxItems": 50,
                    "type": "array"
                  },
                  "from": {
                    "description": "Sender address",
                    "pattern": "^0x[0-9a-fA-F]{40}$",
                    "type": "string"
                  },
                  "to": {
                    "description": "Intended recipient",
                    "pattern": "^0x[0-9a-fA-F]{40}$",
                    "type": "string"
                  }
                },
                "required": [
                  "from",
                  "to"
                ],
                "type": "object"
              },
              "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": {
                  "contacts": {
                    "description": "Only present when contacts were sent",
                    "properties": {
                      "checked": {
                        "type": "integer"
                      },
                      "inContacts": {
                        "type": "boolean"
                      },
                      "lookalikes": {
                        "items": {
                          "properties": {
                            "contact": {
                              "type": "string"
                            },
                            "prefixMatch": {
                              "type": "integer"
                            },
                            "suffixMatch": {
                              "type": "integer"
                            }
                          },
                          "type": "object"
                        },
                        "type": "array"
                      }
                    },
                    "type": "object"
                  },
                  "coverage": {
                    "properties": {
                      "complete": {
                        "type": "boolean"
                      },
                      "coveragePct": {
                        "type": "number"
                      },
                      "rpcCalls": {
                        "type": "integer"
                      },
                      "scannedFrom": {
                        "type": "integer"
                      },
                      "scannedTo": {
                        "type": "integer"
                      },
                      "transfersSeen": {
                        "type": "integer"
                      },
                      "windowBlocks": {
                        "type": "integer"
                      }
                    },
                    "type": "object"
                  },
                  "lookalikes": {
                    "items": {
                      "properties": {
                        "address": {
                          "type": "string"
                        },
                        "dustTransfers": {
                          "type": "integer"
                        },
                        "inbound": {
                          "type": "integer"
                        },
                        "lastBlock": {
                          "type": "integer"
                        },
                        "outbound": {
                          "type": "integer"
                        },
                        "pattern": {
                          "enum": [
                            "dust_or_zero_value",
                            "lookalike_counterparty"
                          ],
                          "type": "string"
                        },
                        "realOut": {
                          "type": "integer"
                        },
                        "sampleTx": {
                          "type": "string"
                        }
                      },
                      "type": "object"
                    },
                    "type": "array"
                  },
                  "reasons": {
                    "items": {
                      "type": "string"
                    },
                    "type": "array"
                  },
                  "risk": {
                    "enum": [
                      "low",
                      "medium",
                      "high"
                    ],
                    "type": "string"
                  },
                  "seenBefore": {
                    "type": "boolean"
                  }
                },
                "required": [
                  "risk",
                  "lookalikes",
                  "seenBefore",
                  "coverage"
                ],
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "tags": [
    "base",
    "usdc",
    "security",
    "address-poisoning",
    "fraud",
    "bazaar"
  ],
  "sourceHost": "paycheck.hectichustle.workers.dev",
  "lastUpdated": "2026-10-13T17:48:56.835Z",
  "quality": {
    "calls30d": 7,
    "uniquePayers30d": 2,
    "lastCalledAt": "2026-10-13T17:48:56.267Z"
  },
  "metadata": {
    "serviceName": "x402 Address Poisoning Check",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "from": "0x9D42EbA8868CFd38A50Ba615ee0cf903F1BBeCE9",
              "to": "0x509E55c4F898B43C856Fb0E51048B1b7bFBC9eDE"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "coverage": {
                "complete": false,
                "coveragePct": 38,
                "rpcCalls": 47,
                "scannedFrom": 52468176,
                "scannedTo": 52518176,
                "transfersSeen": 19,
                "windowBlocks": 50000
              },
              "from": "0x9d42eba8868cfd38a50ba615ee0cf903f1bbece9",
              "lookalikes": [],
              "reasons": [
                "you have paid 'to' before and no lookalikes found"
              ],
              "risk": "low",
              "seenBefore": true,
              "to": "0x509e55c4f898b43c856fb0e51048b1b7bfbc9ede"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "contacts": {
                      "description": "Optional: up to 50 addresses you already trust (address book). 'to' is compared offline against them, so a lookalike of a contact is flagged even outside the scanned history.",
                      "items": {
                        "pattern": "^0x[0-9a-fA-F]{40}$",
                        "type": "string"
                      },
                      "maxItems": 50,
                      "type": "array"
                    },
                    "from": {
                      "description": "Sender address",
                      "pattern": "^0x[0-9a-fA-F]{40}$",
                      "type": "string"
                    },
                    "to": {
                      "description": "Intended recipient",
                      "pattern": "^0x[0-9a-fA-F]{40}$",
                      "type": "string"
                    }
                  },
                  "required": [
                    "from",
                    "to"
                  ],
                  "type": "object"
                },
                "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": {
                    "contacts": {
                      "description": "Only present when contacts were sent",
                      "properties": {
                        "checked": {
                          "type": "integer"
                        },
                        "inContacts": {
                          "type": "boolean"
                        },
                        "lookalikes": {
                          "items": {
                            "properties": {
                              "contact": {
                                "type": "string"
                              },
                              "prefixMatch": {
                                "type": "integer"
                              },
                              "suffixMatch": {
                                "type": "integer"
                              }
                            },
                            "type": "object"
                          },
                          "type": "array"
                        }
                      },
                      "type": "object"
                    },
                    "coverage": {
                      "properties": {
                        "complete": {
                          "type": "boolean"
                        },
                        "coveragePct": {
                          "type": "number"
                        },
                        "rpcCalls": {
                          "type": "integer"
                        },
                        "scannedFrom": {
                          "type": "integer"
                        },
                        "scannedTo": {
                          "type": "integer"
                        },
                        "transfersSeen": {
                          "type": "integer"
                        },
                        "windowBlocks": {
                          "type": "integer"
                        }
                      },
                      "type": "object"
                    },
                    "lookalikes": {
                      "items": {
                        "properties": {
                          "address": {
                            "type": "string"
                          },
                          "dustTransfers": {
                            "type": "integer"
                          },
                          "inbound": {
                            "type": "integer"
                          },
                          "lastBlock": {
                            "type": "integer"
                          },
                          "outbound": {
                            "type": "integer"
                          },
                          "pattern": {
                            "enum": [
                              "dust_or_zero_value",
                              "lookalike_counterparty"
                            ],
                            "type": "string"
                          },
                          "realOut": {
                            "type": "integer"
                          },
                          "sampleTx": {
                            "type": "string"
                          }
                        },
                        "type": "object"
                      },
                      "type": "array"
                    },
                    "reasons": {
                      "items": {
                        "type": "string"
                      },
                      "type": "array"
                    },
                    "risk": {
                      "enum": [
                        "low",
                        "medium",
                        "high"
                      ],
                      "type": "string"
                    },
                    "seenBefore": {
                      "type": "boolean"
                    }
                  },
                  "required": [
                    "risk",
                    "lookalikes",
                    "seenBefore",
                    "coverage"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    }
  },
  "liveness": {
    "reliability": null
  },
  "verified": false,
  "featured": false,
  "provider": {
    "host": "paycheck.hectichustle.workers.dev",
    "manifest_name": "paycheck.hectichustle.workers.dev",
    "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": {
      "contacts": {
        "checked": 0,
        "inContacts": true,
        "lookalikes": [
          {
            "contact": "string",
            "prefixMatch": 0,
            "suffixMatch": 0
          }
        ]
      },
      "coverage": {
        "complete": true,
        "coveragePct": 0,
        "rpcCalls": 0,
        "scannedFrom": 0,
        "scannedTo": 0,
        "transfersSeen": 0,
        "windowBlocks": 0
      },
      "lookalikes": [
        {
          "address": "string",
          "dustTransfers": 0,
          "inbound": 0,
          "lastBlock": 0,
          "outbound": 0,
          "pattern": "dust_or_zero_value",
          "realOut": 0,
          "sampleTx": "string"
        }
      ],
      "reasons": [
        "string"
      ],
      "risk": "low",
      "seenBefore": true
    },
    "type": "string"
  }
}