Evidence row 1038970

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://agentsvc.io/api/v1/proxy/exchange-rates"
    ]
  ],
  "name": "Currency Exchange Rates",
  "owner_address": "0x622efa6ceb83a5b6edbc931332f4db68b7f74f27",
  "raw": {
    "accepts": [
      {
        "amount": "4500",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27",
        "scheme": "exact"
      },
      {
        "amount": "4500",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "Hc3sdEAsCGQcpgfivywog9uwtk8gUBUZgsxdME1EJy88"
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "5JzPS5qpEwUM1vTC9GG7uqvwJdHzbEwfoPHf2Ki977tg",
        "scheme": "exact"
      },
      {
        "amount": "4500",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:137",
        "payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27",
        "scheme": "exact"
      },
      {
        "amount": "4500",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:42161",
        "payTo": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27",
        "scheme": "exact"
      }
    ],
    "description": "Currency exchange rates (forex): official ECB reference rates for about 30 currencies (USD, GBP, CHF, JPY, CNY, ...), published every working day around 16:00 CET, cross rates for any base among them. Returns rates object mapping currency codes to rates relative to base. Pass symbols array to filter (e.g. ['USD','CHF','GBP']). Empty symbols = all supported currencies. Use for currency conversion in invoices, pricing, or financial calculations.",
    "extensions": {
      "bazaar": {
        "category": "finance",
        "info": {
          "input": {
            "body": {
              "base": "EUR",
              "symbols": [
                "USD",
                "CHF",
                "GBP"
              ]
            },
            "bodyType": "json",
            "method": "POST",
            "type": "http"
          },
          "output": {
            "example": {
              "data": {
                "base": "EUR",
                "date": "2026-04-07",
                "rates": {
                  "CHF": 0.9242,
                  "GBP": 0.8594,
                  "JPY": 161.32,
                  "USD": 1.0892
                },
                "source": "European Central Bank via frankfurter.dev"
              },
              "success": true
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "body": {
                  "properties": {
                    "base": {
                      "default": "EUR",
                      "description": "Base currency (e.g. USD, EUR, GBP)",
                      "type": "string"
                    },
                    "symbols": {
                      "description": "Target currencies to return. Empty = all.",
                      "items": {
                        "type": "string"
                      },
                      "type": "array"
                    }
                  },
                  "required": []
                },
                "bodyType": {
                  "enum": [
                    "json",
                    "form-data",
                    "text"
                  ],
                  "type": "string"
                },
                "method": {
                  "enum": [
                    "POST",
                    "PUT",
                    "PATCH"
                  ],
                  "type": "string"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method",
                "bodyType",
                "body"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "data": {
                      "properties": {
                        "base": {
                          "description": "Base currency code (e.g. EUR)",
                          "type": "string"
                        },
                        "date": {
                          "description": "Date of the exchange rates",
                          "format": "date",
                          "type": "string"
                        },
                        "rates": {
                          "additionalProperties": {
                            "type": "number"
                          },
                          "description": "Map of currency code → exchange rate relative to base",
                          "type": "object"
                        },
                        "source": {
                          "description": "Data source attribution. Always: 'European Central Bank via frankfurter.dev'",
                          "type": "string"
                        }
                      },
                      "required": [
                        "base",
                        "date",
                        "rates",
                        "source"
                      ],
                      "type": "object"
                    },
                    "success": {
                      "type": "boolean"
                    }
                  },
                  "required": [
                    "success",
                    "data"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        },
        "tags": [
          "exchange-rates",
          "fx",
          "currency-conversion",
          "forex",
          "finance",
          "currency",
          "exchange",
          "ecb"
        ]
      },
      "builder-code": {
        "info": {
          "a": "bc_q6wi3opd"
        }
      }
    },
    "iconUrl": "https://res.cloudinary.com/bdb-prod/image/upload/c_fill,ar_1:1,w_256,h_256,f_auto,q_auto/v1791462963/bazaar-icons/243ff0b79dbee242.png",
    "lastUpdated": "2026-10-28T23:09:32.427Z",
    "quality": {
      "l30DaysTotalCalls": 19,
      "l30DaysUniquePayers": 6,
      "lastCalledAt": "2026-10-28T23:09:31.834Z"
    },
    "resource": "https://agentsvc.io/api/v1/proxy/exchange-rates",
    "serviceName": "Currency Exchange Rates",
    "tags": [
      "exchange-rates",
      "fx",
      "currency-conversion",
      "forex",
      "finance"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Currency exchange rates (forex): official ECB reference rates for about 30 currencies (USD, GBP, CHF, JPY, CNY, ...), published every working day around 16:00 CET, cross rates for any base among them. Returns rates object mapping currency codes to rates relative to base. Pass symbols array to filter (e.g. ['USD','CHF','GBP']). Empty symbols = all supported currencies. Use for currency conversion in invoices, pricing, or financial calculations."
}

What the leaf hashes

{"body":"e0763a5a34d86e887dd70c0ae7bfb5ae4de4ce1e3c6e18f976e77c42e1687351","id":1038970,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793298277182154,"prev":527181,"subject":"x402_bazaar:https://agentsvc.io/api/v1/proxy/exchange-rates","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-29 (242798 rows).

1. 0x9204841d54a62efe8c21ceed6916523de6504df4e1abf76039bf5a57f4e30327
2. 0xa148f4e9929fe3b72f6cbb55f0e9066a5697b56fb7c4aec628dbad08e18bcb9b
3. 0xa5cfe0fd1cc345ef56ebdb4b27475ab2a15f037ddb4b894224d49c5e11c97a55
4. 0xf683edc5b7aeff24db42b9617c4907fb2040d73a73edee2c3395e9a4c6f8b502
5. 0x02c822f892986c01ab8ea48cce9e7a3a113a80a199175749414a18c474c4625d
6. 0xc1766887ff8bde03f4afbcc024ccf3503623e16e0ec0385670e4b33a092bd5df
7. 0xd149d995efc50a0d145914b3c51a38b2ae241d8edaf12d78d2ceffbdd8e62e21
8. 0xd4d200b849e1e1586c77fff02d844eaebac10f7e1ea4d9569d6c953c0466e554
9. 0x0007d0734ecb30aabb9eabfa9d972c524d82a19912d0f3ae790ef1cc948d8819
10. 0x7264fe6622da07318c72fc58f38af8ee33d28290cd58b67177f71631c91d9e23
11. 0xc12ef8865ab073952a94b5274c5141749a1cb7c1b8fdfe9f95a38a4cdeba6ce2
12. 0xb628b468191eaef8486d0e0260826fbead255c817f95ea83943e285737a87d22
13. 0x834e0aae5de1c77f23e901b21cc37833f72279146f0a5e458548b82d6bed2b7a
14. 0x2ec9677def553f2064a7e34081a129a91f7999a429ef2705c4c539a9602f3bbf
15. 0x09d5ec1c01b0f087fe9f6cc95432188552da9adc88004aed57401ea49f2b56d4
16. 0xe38dc587bc010668982bd78025ac33d7326ffc2587f2de00e848da2718907ecf
17. 0xa1fa2e97e71ad6e802f325afd74bb7095901f2060529c9739182a1233f8804bc
18. 0xe01539ac4c9f9cdf265a9e5c6d99c8da11e70ff0c7175fb23e402d33b9d79785

Day root

0xc050555c6b023f2aefb6536efb9f0760b92c30a0d06c572b7daf63db259ea17c

Chained

0x4cde8bae2042512e1bec11650628f0293556311cc4ea74d99ffddf02b671a7d6

Published

On Arc Testnet, block 69753317: 0x9e85c340732f416e431b111fae72f7624870125f7f379af2732eb6c2ba8cf6a1