Evidence row 2633553

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://api.facts402.com/fx"
    ]
  ],
  "name": "Currency Exchange Rates (ECB)",
  "owner_address": "0x5498b0aa90cd56f8962cbd136df3d3769c85f149",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x5498b0Aa90cd56F8962CBd136DF3D3769C85f149",
        "scheme": "exact"
      }
    ],
    "description": "Use when an agent needs currency conversion at official European Central Bank reference rates for pricing, invoicing, travel budgets or accounting: ~30 currencies, latest or any day in the last 90 days, with the publication date used and exact decimal results. $0.01 USDC on Base; charged only on 2xx, never for invalid input.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "body": {
              "amount": 100,
              "from": "USD",
              "to": "JPY"
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "amount": "100",
              "converted": "15805.929919",
              "disclaimer": "Euro foreign exchange reference rates published by the European Central Bank (usually around 16:00 CET on TARGET working days). Cross rates are derived via EUR; 'rate' and 'converted' are decimal strings. For a date without a publication (weekend, holiday) the most recent earlier rate is used. Reference rates are for information only; they are not the rates offered by banks or payment providers.",
              "eur_reference": {
                "JPY": "175.92",
                "USD": "1.113"
              },
              "from": "USD",
              "rate": "158.0592992",
              "rate_date": "2026-10-29",
              "requested_date": null,
              "served_from_cache_during_ecb_outage": false,
              "source": "European Central Bank euro foreign exchange reference rates",
              "to": "JPY"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "amount": {
                      "description": "Amount in the source currency",
                      "exclusiveMinimum": 0,
                      "type": "number"
                    },
                    "date": {
                      "description": "Optional YYYY-MM-DD within the last 90 days",
                      "format": "date",
                      "type": "string"
                    },
                    "from": {
                      "description": "ISO 4217 code, e.g. USD",
                      "pattern": "^[A-Za-z]{3}$",
                      "type": "string"
                    },
                    "to": {
                      "description": "ISO 4217 code, e.g. EUR",
                      "pattern": "^[A-Za-z]{3}$",
                      "type": "string"
                    }
                  },
                  "required": [
                    "amount",
                    "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": {
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1793658650/bazaar-icons/b19652566eac22f6.png",
    "lastUpdated": "2026-11-02T22:31:00.282Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-11-02T22:31:00.088Z"
    },
    "resource": "https://api.facts402.com/fx",
    "serviceName": "Currency Exchange Rates (ECB)",
    "tags": [
      "exchange rates",
      "currency conversion",
      "ecb rates",
      "fx rates",
      "historical rates"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Use when an agent needs currency conversion at official European Central Bank reference rates for pricing, invoicing, travel budgets or accounting: ~30 currencies, latest or any day in the last 90 days, with the publication date used and exact decimal results. $0.01 USDC on Base; charged only on 2xx, never for invalid input."
}

What the leaf hashes

{"body":"8be69b1607fdecec26e05576b904bed3a3a5b6338c1d0875f1c445690ed3483e","id":2633553,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793734405482409,"prev":1261873,"subject":"x402_bazaar:https://api.facts402.com/fx","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-03 (425475 rows).

1. 0x73daa6bbf2fcb06390a563baaddccea6e5043f08fbd206434814afe4b2b1f7a5
2. 0x91f4ed563f3d4819153a70be2fc0ce03965dbd9f3eeb3a18e571a4344e0fd2a8
3. 0xc3eed96a773027762e9c8ead746ebc83150560c3caf8fbcbdfd2dd6dd3d34f15
4. 0xb20af2dc2e5c864d674e89c4db67e965f2ab7aa9b5bcf74f0b5314446f693c41
5. 0xcb4912d2ffee698df01c49566f6709cfb5f423048c961b94d3ec7b8f5be9a62c
6. 0x8b0f1b130c58295bf30056109d279ceb87630caff6cb5659e9516d0293dcd57f
7. 0xde511d9b35303aabe2938f3e9f6d47f18d0964de54cfbde60f12ccdd344f3294
8. 0x3d624bf981308628cb8a50efbfe20cc0e9b9f4e8ded57722ee4ff976e4f6d482
9. 0x7b322f343b1b31269606248b881f5331a4b6dce8271410c4698a097e220c3ae8
10. 0x661110ea828219148bda62f5832f6d6955ac6dffd5e660909b63c8eaefadf349
11. 0x41c195782cd43d4c38c1bb968bdbe3b106813122c273f8b621fcf16d52e0f326
12. 0xa74b84d5b52898537a474fe92b8dc6e935e836e61482e2ca9473db11202e5b03
13. 0x892eb4fc237b63aa9cb555db156e93417ecefd6e971d8aae4d777eefb8211946
14. 0x8888e0d25075a71372832a4a34d226613212be78f7f52e7bc201b28be0cf3c7b
15. 0x1be647e954f61ace2ed9636ef78e1986bb535c60f6f7e9d512f4249f9507bb36
16. 0x4f2735e4d41cb2a5d48f6769cc066ea1066bbcd0623dd42fe7bc81e54092cd64
17. 0x3ef2d6c56d2bc5990e646c07605e90ed24d1c642cbcca8f60a35422b8b7981ee
18. 0x717b5d7cbc24826c5b1f7b7433bf30b76e9ba1370476af4e1b494a5211897cc3
19. 0xe35032d4b064b015fe60638756eeb0bc24e7c7943586468d33349341ee0ed3d6

Day root

0xb646ffa569e24bf8336b0a15a9d98d0a2f1239f58e10c2b18a9d22e43343566a

Chained

0x35e926359fd19031c6b5e08fb3b44f2524386a57c8fdd353336c185603f53d43

Published

On Arc Testnet, block 70601990: 0xa5f9dadba13cde129126b950e64b815e6833cb8ff53b75026c9dbe769c3768c7