{
  "x402Version": 2,
  "id": 35729,
  "slug": "35729",
  "resource": "https://base-facts.yankii.fr/v1/batch",
  "description": "Base token BATCH sell check: up to 10 token addresses in one call and one payment. For each token it simulates a small buy and an immediate sell inside eth_call (no trade is sent) and returns buy tax, sell tax, round-trip loss, flags and a plain summary; a token it cannot simulate is returned as not_simulated with the reason. Built for bots that screen many new tokens: $0.03 for up to 10 (single check: $0.005). Facts, not advice.",
  "type": "http",
  "serviceName": "Base Token Batch Screen",
  "resourceType": "Market Data",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0x40661D56c2Bf416c5946A8b21098eaF8D33459A2",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "30000",
      "amountUsd": 0.03,
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "properties": {
      "example": {
        "properties": {
          "count": {
            "type": "number"
          },
          "results": {
            "items": {
              "properties": {
                "blockNumber": {
                  "type": "string"
                },
                "disclaimer": {
                  "type": "string"
                },
                "flags": {
                  "items": {
                    "properties": {
                      "fact": {
                        "description": "The on-chain observation behind the flag",
                        "type": "string"
                      },
                      "id": {
                        "enum": [
                          "not_erc20",
                          "upgradeable_proxy",
                          "owner_not_renounced",
                          "can_mint",
                          "can_pause",
                          "can_blacklist",
                          "no_liquidity",
                          "thin_liquidity",
                          "deep_liquidity",
                          "v4_liquidity_unmeasured",
                          "v4_pool_empty",
                          "sell_ok",
                          "buy_tax",
                          "sell_tax",
                          "high_round_trip_loss",
                          "sell_reverted",
                          "buy_reverted",
                          "not_simulated"
                        ],
                        "type": "string"
                      },
                      "severity": {
                        "enum": [
                          "info",
                          "warn",
                          "high"
                        ],
                        "type": "string"
                      }
                    },
                    "type": "object"
                  },
                  "type": "array"
                },
                "name": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "simulation": {
                  "description": "eth_call buy-and-sell simulation at the verdict's block; null when the address is not an ERC20",
                  "properties": {
                    "amounts": {
                      "properties": {
                        "tokenReachedPool": {
                          "type": [
                            "string",
                            "null"
                          ]
                        },
                        "tokenReceived": {
                          "type": "string"
                        },
                        "tokenReleasedByPool": {
                          "type": "string"
                        },
                        "tokenSent": {
                          "type": "string"
                        },
                        "wethOut": {
                          "type": "string"
                        }
                      },
                      "type": "object"
                    },
                    "attempts": {
                      "items": {
                        "properties": {
                          "dex": {
                            "type": "string"
                          },
                          "fee": {
                            "type": [
                              "integer",
                              "null"
                            ]
                          },
                          "leg": {
                            "enum": [
                              "buy",
                              "sell",
                              "unknown"
                            ],
                            "type": "string"
                          },
                          "ok": {
                            "type": "boolean"
                          },
                          "pool": {
                            "type": "string"
                          },
                          "revertReason": {
                            "type": "string"
                          },
                          "wethIn": {
                            "type": "string"
                          }
                        },
                        "type": "object"
                      },
                      "type": "array"
                    },
                    "buyTaxPct": {
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "dex": {
                      "enum": [
                        "uniswap-v2",
                        "uniswap-v3",
                        "aerodrome-volatile",
                        "uniswap-v4"
                      ],
                      "type": "string"
                    },
                    "fee": {
                      "description": "Uniswap fee in hundredths of a basis point (500 = 0.05%)",
                      "type": [
                        "integer",
                        "null"
                      ]
                    },
                    "hooks": {
                      "type": "string"
                    },
                    "pool": {
                      "type": "string"
                    },
                    "reason": {
                      "description": "Why the simulation was not run (status not_simulated)",
                      "type": "string"
                    },
                    "roundTripLossPct": {
                      "description": "WETH lost buying and selling straight back, pool fees included",
                      "type": "number"
                    },
                    "sellTaxPct": {
                      "description": "null on Uniswap v3 (not measurable)",
                      "type": [
                        "number",
                        "null"
                      ]
                    },
                    "status": {
                      "enum": [
                        "ok",
                        "sell_reverted",
                        "buy_reverted",
                        "not_simulated"
                      ],
                      "type": "string"
                    },
                    "wethIn": {
                      "description": "WETH wei used for the simulated buy",
                      "type": "string"
                    }
                  },
                  "type": [
                    "object",
                    "null"
                  ]
                },
                "source": {
                  "type": "string"
                },
                "summary": {
                  "type": "string"
                },
                "symbol": {
                  "type": [
                    "string",
                    "null"
                  ]
                },
                "token": {
                  "type": "string"
                }
              },
              "type": "object"
            },
            "type": "array"
          },
          "skipped": {
            "items": {
              "properties": {
                "reason": {
                  "type": "string"
                },
                "token": {
                  "type": "string"
                }
              },
              "type": "object"
            },
            "type": "array"
          }
        },
        "type": "object"
      },
      "type": {
        "type": "string"
      }
    },
    "required": [
      "type"
    ],
    "type": "object"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "tokens": [
              "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
              "0x4200000000000000000000000000000000000006"
            ]
          },
          "bodyType": "json",
          "method": "POST",
          "type": "http"
        },
        "output": {
          "example": {
            "count": 1,
            "results": [
              {
                "blockNumber": "52159737",
                "disclaimer": "eth_call simulation at block 52159737: a small buy with WETH and an immediate sell on the token's deepest WETH pools. Not a guarantee: the token's code or owner can change, and some tokens treat addresses or sizes differently. Not financial advice.",
                "flags": [
                  {
                    "fact": "Bought with 0.01 WETH and sold straight back on uniswap-v3 pool 0x6c561B446416E1A00E8E93E221854d6eA4171372 at block 52159737 (eth_call simulation): round-trip loss 0.6%, which includes a 0.30% pool fee paid twice and any token tax.",
                    "id": "sell_ok",
                    "severity": "info"
                  }
                ],
                "name": "USD Coin",
                "simulation": {
                  "amounts": {
                    "tokenReachedPool": null,
                    "tokenReceived": "26912247",
                    "tokenReleasedByPool": "26912247",
                    "tokenSent": "26912247",
                    "wethOut": "9940089592377343"
                  },
                  "attempts": [
                    {
                      "dex": "uniswap-v3",
                      "fee": 3000,
                      "ok": true,
                      "pool": "0x6c561B446416E1A00E8E93E221854d6eA4171372",
                      "wethIn": "10000000000000000"
                    }
                  ],
                  "buyTaxPct": 0,
                  "dex": "uniswap-v3",
                  "fee": 3000,
                  "pool": "0x6c561B446416E1A00E8E93E221854d6eA4171372",
                  "roundTripLossPct": 0.6,
                  "sellTaxPct": null,
                  "status": "ok",
                  "wethIn": "10000000000000000"
                },
                "source": "base-mainnet-rpc",
                "summary": "USDC: Simulated buy and sell on uniswap-v3: no transfer tax, round-trip loss 0.6%.",
                "symbol": "USDC",
                "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
              }
            ],
            "skipped": [
              {
                "reason": "not a contract",
                "token": "0x0000000000000000000000000000000000000001"
              }
            ]
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "body": {
                "properties": {
                  "tokens": {
                    "description": "1 to 10 distinct Base token addresses",
                    "items": {
                      "description": "Token contract address (0x-prefixed hex, 20 bytes)",
                      "type": "string"
                    },
                    "maxItems": 10,
                    "minItems": 1,
                    "type": "array"
                  }
                },
                "required": [
                  "tokens"
                ],
                "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": {
                  "count": {
                    "type": "number"
                  },
                  "results": {
                    "items": {
                      "properties": {
                        "blockNumber": {
                          "type": "string"
                        },
                        "disclaimer": {
                          "type": "string"
                        },
                        "flags": {
                          "items": {
                            "properties": {
                              "fact": {
                                "description": "The on-chain observation behind the flag",
                                "type": "string"
                              },
                              "id": {
                                "enum": [
                                  "not_erc20",
                                  "upgradeable_proxy",
                                  "owner_not_renounced",
                                  "can_mint",
                                  "can_pause",
                                  "can_blacklist",
                                  "no_liquidity",
                                  "thin_liquidity",
                                  "deep_liquidity",
                                  "v4_liquidity_unmeasured",
                                  "v4_pool_empty",
                                  "sell_ok",
                                  "buy_tax",
                                  "sell_tax",
                                  "high_round_trip_loss",
                                  "sell_reverted",
                                  "buy_reverted",
                                  "not_simulated"
                                ],
                                "type": "string"
                              },
                              "severity": {
                                "enum": [
                                  "info",
                                  "warn",
                                  "high"
                                ],
                                "type": "string"
                              }
                            },
                            "type": "object"
                          },
                          "type": "array"
                        },
                        "name": {
                          "type": [
                            "string",
                            "null"
                          ]
                        },
                        "simulation": {
                          "description": "eth_call buy-and-sell simulation at the verdict's block; null when the address is not an ERC20",
                          "properties": {
                            "amounts": {
                              "properties": {
                                "tokenReachedPool": {
                                  "type": [
                                    "string",
                                    "null"
                                  ]
                                },
                                "tokenReceived": {
                                  "type": "string"
                                },
                                "tokenReleasedByPool": {
                                  "type": "string"
                                },
                                "tokenSent": {
                                  "type": "string"
                                },
                                "wethOut": {
                                  "type": "string"
                                }
                              },
                              "type": "object"
                            },
                            "attempts": {
                              "items": {
                                "properties": {
                                  "dex": {
                                    "type": "string"
                                  },
                                  "fee": {
                                    "type": [
                                      "integer",
                                      "null"
                                    ]
                                  },
                                  "leg": {
                                    "enum": [
                                      "buy",
                                      "sell",
                                      "unknown"
                                    ],
                                    "type": "string"
                                  },
                                  "ok": {
                                    "type": "boolean"
                                  },
                                  "pool": {
                                    "type": "string"
                                  },
                                  "revertReason": {
                                    "type": "string"
                                  },
                                  "wethIn": {
                                    "type": "string"
                                  }
                                },
                                "type": "object"
                              },
                              "type": "array"
                            },
                            "buyTaxPct": {
                              "type": [
                                "number",
                                "null"
                              ]
                            },
                            "dex": {
                              "enum": [
                                "uniswap-v2",
                                "uniswap-v3",
                                "aerodrome-volatile",
                                "uniswap-v4"
                              ],
                              "type": "string"
                            },
                            "fee": {
                              "description": "Uniswap fee in hundredths of a basis point (500 = 0.05%)",
                              "type": [
                                "integer",
                                "null"
                              ]
                            },
                            "hooks": {
                              "type": "string"
                            },
                            "pool": {
                              "type": "string"
                            },
                            "reason": {
                              "description": "Why the simulation was not run (status not_simulated)",
                              "type": "string"
                            },
                            "roundTripLossPct": {
                              "description": "WETH lost buying and selling straight back, pool fees included",
                              "type": "number"
                            },
                            "sellTaxPct": {
                              "description": "null on Uniswap v3 (not measurable)",
                              "type": [
                                "number",
                                "null"
                              ]
                            },
                            "status": {
                              "enum": [
                                "ok",
                                "sell_reverted",
                                "buy_reverted",
                                "not_simulated"
                              ],
                              "type": "string"
                            },
                            "wethIn": {
                              "description": "WETH wei used for the simulated buy",
                              "type": "string"
                            }
                          },
                          "type": [
                            "object",
                            "null"
                          ]
                        },
                        "source": {
                          "type": "string"
                        },
                        "summary": {
                          "type": "string"
                        },
                        "symbol": {
                          "type": [
                            "string",
                            "null"
                          ]
                        },
                        "token": {
                          "type": "string"
                        }
                      },
                      "type": "object"
                    },
                    "type": "array"
                  },
                  "skipped": {
                    "items": {
                      "properties": {
                        "reason": {
                          "type": "string"
                        },
                        "token": {
                          "type": "string"
                        }
                      },
                      "type": "object"
                    },
                    "type": "array"
                  }
                },
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    }
  },
  "tags": [
    "base",
    "token",
    "honeypot",
    "tax",
    "batch",
    "bazaar"
  ],
  "sourceHost": "base-facts.yankii.fr",
  "lastUpdated": "2026-10-11T11:31:27.879Z",
  "quality": {
    "calls30d": 1,
    "uniquePayers30d": 1,
    "lastCalledAt": "2026-10-11T11:31:27.345Z"
  },
  "metadata": {
    "serviceName": "Base Token Batch Screen",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "tokens": [
                "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
                "0x4200000000000000000000000000000000000006"
              ]
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "count": 1,
              "results": [
                {
                  "blockNumber": "52159737",
                  "disclaimer": "eth_call simulation at block 52159737: a small buy with WETH and an immediate sell on the token's deepest WETH pools. Not a guarantee: the token's code or owner can change, and some tokens treat addresses or sizes differently. Not financial advice.",
                  "flags": [
                    {
                      "fact": "Bought with 0.01 WETH and sold straight back on uniswap-v3 pool 0x6c561B446416E1A00E8E93E221854d6eA4171372 at block 52159737 (eth_call simulation): round-trip loss 0.6%, which includes a 0.30% pool fee paid twice and any token tax.",
                      "id": "sell_ok",
                      "severity": "info"
                    }
                  ],
                  "name": "USD Coin",
                  "simulation": {
                    "amounts": {
                      "tokenReachedPool": null,
                      "tokenReceived": "26912247",
                      "tokenReleasedByPool": "26912247",
                      "tokenSent": "26912247",
                      "wethOut": "9940089592377343"
                    },
                    "attempts": [
                      {
                        "dex": "uniswap-v3",
                        "fee": 3000,
                        "ok": true,
                        "pool": "0x6c561B446416E1A00E8E93E221854d6eA4171372",
                        "wethIn": "10000000000000000"
                      }
                    ],
                    "buyTaxPct": 0,
                    "dex": "uniswap-v3",
                    "fee": 3000,
                    "pool": "0x6c561B446416E1A00E8E93E221854d6eA4171372",
                    "roundTripLossPct": 0.6,
                    "sellTaxPct": null,
                    "status": "ok",
                    "wethIn": "10000000000000000"
                  },
                  "source": "base-mainnet-rpc",
                  "summary": "USDC: Simulated buy and sell on uniswap-v3: no transfer tax, round-trip loss 0.6%.",
                  "symbol": "USDC",
                  "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
                }
              ],
              "skipped": [
                {
                  "reason": "not a contract",
                  "token": "0x0000000000000000000000000000000000000001"
                }
              ]
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "tokens": {
                      "description": "1 to 10 distinct Base token addresses",
                      "items": {
                        "description": "Token contract address (0x-prefixed hex, 20 bytes)",
                        "type": "string"
                      },
                      "maxItems": 10,
                      "minItems": 1,
                      "type": "array"
                    }
                  },
                  "required": [
                    "tokens"
                  ],
                  "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": {
                    "count": {
                      "type": "number"
                    },
                    "results": {
                      "items": {
                        "properties": {
                          "blockNumber": {
                            "type": "string"
                          },
                          "disclaimer": {
                            "type": "string"
                          },
                          "flags": {
                            "items": {
                              "properties": {
                                "fact": {
                                  "description": "The on-chain observation behind the flag",
                                  "type": "string"
                                },
                                "id": {
                                  "enum": [
                                    "not_erc20",
                                    "upgradeable_proxy",
                                    "owner_not_renounced",
                                    "can_mint",
                                    "can_pause",
                                    "can_blacklist",
                                    "no_liquidity",
                                    "thin_liquidity",
                                    "deep_liquidity",
                                    "v4_liquidity_unmeasured",
                                    "v4_pool_empty",
                                    "sell_ok",
                                    "buy_tax",
                                    "sell_tax",
                                    "high_round_trip_loss",
                                    "sell_reverted",
                                    "buy_reverted",
                                    "not_simulated"
                                  ],
                                  "type": "string"
                                },
                                "severity": {
                                  "enum": [
                                    "info",
                                    "warn",
                                    "high"
                                  ],
                                  "type": "string"
                                }
                              },
                              "type": "object"
                            },
                            "type": "array"
                          },
                          "name": {
                            "type": [
                              "string",
                              "null"
                            ]
                          },
                          "simulation": {
                            "description": "eth_call buy-and-sell simulation at the verdict's block; null when the address is not an ERC20",
                            "properties": {
                              "amounts": {
                                "properties": {
                                  "tokenReachedPool": {
                                    "type": [
                                      "string",
                                      "null"
                                    ]
                                  },
                                  "tokenReceived": {
                                    "type": "string"
                                  },
                                  "tokenReleasedByPool": {
                                    "type": "string"
                                  },
                                  "tokenSent": {
                                    "type": "string"
                                  },
                                  "wethOut": {
                                    "type": "string"
                                  }
                                },
                                "type": "object"
                              },
                              "attempts": {
                                "items": {
                                  "properties": {
                                    "dex": {
                                      "type": "string"
                                    },
                                    "fee": {
                                      "type": [
                                        "integer",
                                        "null"
                                      ]
                                    },
                                    "leg": {
                                      "enum": [
                                        "buy",
                                        "sell",
                                        "unknown"
                                      ],
                                      "type": "string"
                                    },
                                    "ok": {
                                      "type": "boolean"
                                    },
                                    "pool": {
                                      "type": "string"
                                    },
                                    "revertReason": {
                                      "type": "string"
                                    },
                                    "wethIn": {
                                      "type": "string"
                                    }
                                  },
                                  "type": "object"
                                },
                                "type": "array"
                              },
                              "buyTaxPct": {
                                "type": [
                                  "number",
                                  "null"
                                ]
                              },
                              "dex": {
                                "enum": [
                                  "uniswap-v2",
                                  "uniswap-v3",
                                  "aerodrome-volatile",
                                  "uniswap-v4"
                                ],
                                "type": "string"
                              },
                              "fee": {
                                "description": "Uniswap fee in hundredths of a basis point (500 = 0.05%)",
                                "type": [
                                  "integer",
                                  "null"
                                ]
                              },
                              "hooks": {
                                "type": "string"
                              },
                              "pool": {
                                "type": "string"
                              },
                              "reason": {
                                "description": "Why the simulation was not run (status not_simulated)",
                                "type": "string"
                              },
                              "roundTripLossPct": {
                                "description": "WETH lost buying and selling straight back, pool fees included",
                                "type": "number"
                              },
                              "sellTaxPct": {
                                "description": "null on Uniswap v3 (not measurable)",
                                "type": [
                                  "number",
                                  "null"
                                ]
                              },
                              "status": {
                                "enum": [
                                  "ok",
                                  "sell_reverted",
                                  "buy_reverted",
                                  "not_simulated"
                                ],
                                "type": "string"
                              },
                              "wethIn": {
                                "description": "WETH wei used for the simulated buy",
                                "type": "string"
                              }
                            },
                            "type": [
                              "object",
                              "null"
                            ]
                          },
                          "source": {
                            "type": "string"
                          },
                          "summary": {
                            "type": "string"
                          },
                          "symbol": {
                            "type": [
                              "string",
                              "null"
                            ]
                          },
                          "token": {
                            "type": "string"
                          }
                        },
                        "type": "object"
                      },
                      "type": "array"
                    },
                    "skipped": {
                      "items": {
                        "properties": {
                          "reason": {
                            "type": "string"
                          },
                          "token": {
                            "type": "string"
                          }
                        },
                        "type": "object"
                      },
                      "type": "array"
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    }
  },
  "liveness": {
    "reliability": null
  },
  "verified": false,
  "featured": false,
  "provider": {
    "host": "base-facts.yankii.fr",
    "manifest_name": "base-facts.yankii.fr",
    "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": {
      "count": 0,
      "results": [
        {
          "blockNumber": "string",
          "disclaimer": "string",
          "flags": [
            {
              "fact": "string",
              "id": "not_erc20",
              "severity": "info"
            }
          ],
          "name": "string",
          "simulation": {
            "amounts": {
              "tokenReachedPool": "string",
              "tokenReceived": "string",
              "tokenReleasedByPool": "string",
              "tokenSent": "string",
              "wethOut": "string"
            },
            "attempts": [
              {
                "dex": null,
                "fee": null,
                "leg": null,
                "ok": null,
                "pool": null,
                "revertReason": null,
                "wethIn": null
              }
            ],
            "buyTaxPct": 0,
            "dex": "uniswap-v2",
            "fee": 0,
            "hooks": "string",
            "pool": "string",
            "reason": "string",
            "roundTripLossPct": 0,
            "sellTaxPct": 0,
            "status": "ok",
            "wethIn": "string"
          },
          "source": "string",
          "summary": "string",
          "symbol": "string",
          "token": "string"
        }
      ],
      "skipped": [
        {
          "reason": "string",
          "token": "string"
        }
      ]
    },
    "type": "string"
  }
}