Evidence row 426847

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://x402-niche-briefs.fly.dev/v1/mpf-hmf-fee-calc"
    ]
  ],
  "name": "MPF & HMF calculator",
  "owner_address": "0x847f54ae8ddfd71ed7bc930c1f7a73576fab03a9",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x847f54ae8dDFD71ed7bC930C1f7a73576FAb03A9",
        "scheme": "exact"
      }
    ],
    "description": "Merchandise Processing Fee and Harbor Maintenance Fee (FY2026).",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "entered_value_usd": "25000",
              "informal": "false",
              "mode": "ocean"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "as_of": "2026-10-25",
              "disclaimer": "Educational reference and automated checklist only; not legal advice.",
              "hmf_usd": 31.25,
              "input": {
                "entered_value_usd": 25000,
                "informal": false,
                "mode": "ocean"
              },
              "mpf_usd": 86.6,
              "note": "FY2026 MPF 0.3464% min $32.71 max $651.50 (verify annual CBP update)",
              "total_usd": 117.85
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "entered_value_usd": {
                      "description": "Entered value",
                      "type": "string"
                    },
                    "informal": {
                      "description": "Informal entry (<$2,500)",
                      "type": "string"
                    },
                    "mode": {
                      "description": "Mode",
                      "enum": [
                        "ocean",
                        "air",
                        "truck"
                      ],
                      "type": "string"
                    }
                  },
                  "required": [
                    "entered_value_usd",
                    "mode",
                    "informal"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "$schema": "https://json-schema.org/draft/2020-12/schema",
                  "properties": {
                    "as_of": {
                      "type": "string"
                    },
                    "disclaimer": {
                      "type": "string"
                    },
                    "hmf_usd": {
                      "type": "number"
                    },
                    "input": {
                      "properties": {
                        "entered_value_usd": {
                          "type": "number"
                        },
                        "informal": {
                          "type": "boolean"
                        },
                        "mode": {
                          "type": "string"
                        }
                      },
                      "required": [
                        "entered_value_usd",
                        "mode",
                        "informal"
                      ],
                      "type": "object"
                    },
                    "mpf_usd": {
                      "type": "number"
                    },
                    "note": {
                      "type": "string"
                    },
                    "total_usd": {
                      "type": "number"
                    }
                  },
                  "required": [
                    "input",
                    "mpf_usd",
                    "hmf_usd",
                    "total_usd",
                    "note",
                    "disclaimer",
                    "as_of"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-27T02:43:35.636Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 2,
      "lastCalledAt": "2026-10-27T02:43:35.448Z"
    },
    "resource": "https://x402-niche-briefs.fly.dev/v1/mpf-hmf-fee-calc",
    "serviceName": "MPF & HMF calculator",
    "tags": [
      "supply-chain",
      "customs"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Merchandise Processing Fee and Harbor Maintenance Fee (FY2026)."
}

What the leaf hashes

{"body":"390baa0d8a2c512d5227f7a0faa16f7b7d9003c06a69258a4c18aef4389800d6","id":426847,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793086313271053,"prev":409309,"subject":"x402_bazaar:https://x402-niche-briefs.fly.dev/v1/mpf-hmf-fee-calc","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0x3bd3106df2a02eedccadc3b0df0176cd4504f1bfa1a337e7aad4b2eb23cdb889
2. 0x29045d3cbdf5a63130f5d1ededfa0c7c4dea6baae4724f840eb31c5f417ddfff
3. 0xa4c85d857d95d07f278dbe3d9d51d54e6b4794eb5581f36d7335e00a42be2c88
4. 0x88c5978b1b6ac73fbc4dbff8f3e600894f602e7122148e9a704a4143f18d177b
5. 0xeff80eff7e86b48c779e55462963ea7821789f838d6aacd84aeb75b40cfcf6e7
6. 0xe12676a6005919fa97d98a83547a050db1a58b2d1c8f3319632bbc57e8554125
7. 0x8e6ee45a79323df1f2a7c8c60f43c0fafd88661ef0838b5d443c0c05f7c61d77
8. 0x3a7c5095252d48f16cfbfab5d27a598879692ac169342bc200d964c8296a2227
9. 0xe8058e6b5df8eeb6a306a513a2731493afca0bad46b037c0e7cdb391b5f3bc43
10. 0x8981ebca6d19f9b04318ac5730e4bc2f41ad0338b640ee632559e5f20d8a5f7c
11. 0x142ffc1d2025965a3e91857cd2d35ac599e5120c39272796b11f4a87c43bb99b
12. 0x5bcdf911ebda5c6d942d996f5453cef161d2571921ceb388d7c8ffbdc925f4d0
13. 0x9e70d944564843a0f0d88b623d628ff2e2ac17c172d4ebe0ed141fe8b9f9dae4
14. 0x42784d9809d120654630ee1b254a1dd90a2bbd3024aa180f1a59bbf53e9316e4
15. 0x8360ee1105e4d9f9312067cbbfd47c69c5948665ae582b9684a580c8f4e199e1
16. 0x52efa60e0c3d8525486d2310eb3b6b566c9677c64fd1f819edb072cf101bcbdb
17. 0x22c1fb9487ee0b9732fa017a0cc321eb27a60c08450d112f755089796e12cb1c
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4