Evidence row 1790231

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://reference-data-api.onrender.com/v1/treasury-rate"
    ]
  ],
  "name": "Reference Data API",
  "owner_address": "0x6bffcc85172372ad4e9c1ffafe97980a2c778fc7",
  "raw": {
    "accepts": [
      {
        "amount": "15000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x6BfFcc85172372aD4e9c1Ffafe97980A2C778FC7",
        "scheme": "exact"
      }
    ],
    "description": "Returns the official quarterly US Treasury Reporting Rate of Exchange (foreign currency per USD) for a currency and date, as used for US federal accounting and tax reporting, with optional conversion.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "amount": "1000",
              "currency": "EUR"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "rates": [
                {
                  "country_currency": "Euro Zone-Euro",
                  "foreign_per_usd": 0.861
                }
              ],
              "table_date": "2026-09-30"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET",
                    "HEAD",
                    "DELETE"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "amount": {
                      "description": "Amount in foreign currency to convert to USD",
                      "type": "string"
                    },
                    "currency": {
                      "description": "ISO code (EUR, CHF, JPY...) or country name",
                      "type": "string"
                    },
                    "date": {
                      "description": "YYYY-MM-DD, default today",
                      "type": "string"
                    }
                  },
                  "required": [
                    "currency"
                  ],
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-11-01T09:54:08.085Z",
    "quality": {
      "l30DaysTotalCalls": 1,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-11-01T09:54:07.864Z"
    },
    "resource": "https://reference-data-api.onrender.com/v1/treasury-rate",
    "serviceName": "Reference Data API",
    "tags": [
      "fx",
      "accounting",
      "tax",
      "treasury",
      "finance"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Returns the official quarterly US Treasury Reporting Rate of Exchange (foreign currency per USD) for a currency and date, as used for US federal accounting and tax reporting, with optional conversion."
}

What the leaf hashes

{"body":"e509d36418ec317c261547f287334b2298e38cc1d277caeec98cf7bd0d34a9b5","id":1790231,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793559932496060,"prev":null,"subject":"x402_bazaar:https://reference-data-api.onrender.com/v1/treasury-rate","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-01 (302406 rows).

1. 0x2ac403105167e1f86daf3d3f2ac8aec75169bd14bf1be29e802d40f226bbd893
2. 0xc909e838ffbdeab3c035b1d9c0382c30d165f827f4e370d85b7723b648d0d14a
3. 0x9677a368d41826e9ced30086a28b3243bf018327ea50d2b84c11f689d542d72e
4. 0x55f408117e295c022955dd482d7aa049bb6b493f898876d7fd11f755c6bb7cc3
5. 0x6e6e56671702c3f7181095680f4780aeb6b944a61bfdb55e0d19d1fe4fb92f3e
6. 0x7e15feb4c351d088bf34daf2f3f187a089fada4db5f3ac2510b23fbb891ed64d
7. 0xd66212956c6906f3fd4b64e323b87668d9d6b9c261dba99f74f215b619715c3a
8. 0x16b8df55d91a67321b97d467c5a08aef893b63b8c9d38f899952285e36142625
9. 0xd49318e1b6a9fea08080873cd85fc52070e7f009ca77d059291a41343bcd28d4
10. 0x05aaf25ba18f213abba530b1c993bcf4149ca21f4ee71c75a76f94a2ab84c507
11. 0x49c3efdd52b6a1482b019e15a2a86d801b5c994cf1f2b820eef0f1352c0942ba
12. 0x5afbfdcc2671809296fb4d0c5c0394fc4524c2baa833b51dac27e5e817c30aab
13. 0x119e26a40ea5ea49199024d5e4dc5ea7e4b7110b91f88cec9a3d894fa9681bde
14. 0x894f627e9eac1731ca26b2b4b6529eb16ab1b15294210edac68c8378063e2d8d
15. 0x80b1e578d986f759ca01ea02c7a922e757a26a65318f9844ac72c5c1d4fe339e
16. 0xa856ad79e6f29a2b5516257f0d4817172cca11251fe2e7e8f3911b105fe2b622
17. 0x02b3554752e71a19b12d7a76dbff436e85387226ceec89fdebdcdaf0122c2932
18. 0x1973893697931b7512ae5dc1a3c92ef92f633ae3574dce9029a35b5e94d2d364
19. 0x3315fd2757fdd435852cc277377234a3f3909a6d2a089d0e36f6d59aacfda910

Day root

0x7fa2cba1cf3d6b35630896f5fe1a650adb307ea2c376e80a5f2d9276b7cb5ab3

Chained

0x577ff89ba012beeff3197bcff7fa86752074bdf54205a24359cc437be2a952a4

Published

On Arc Testnet, block 70262758: 0x435bc1b9331471d72e1998f2e420983b5189d4da65ffbd6f27ef40daf5e1ea90