Evidence row 278576

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://agent-toolbox.zafermemon87.workers.dev/v1/fx"
    ]
  ],
  "name": "Agent Toolbox",
  "owner_address": "0xa41015022322640f03a895bc439da80ddfd73954",
  "raw": {
    "accepts": [
      {
        "amount": "2000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xa41015022322640f03a895bc439da80ddfd73954",
        "scheme": "exact"
      }
    ],
    "description": "Currency exchange rates and conversion for about 30 currencies (USD, EUR, GBP, INR, JPY, CNY ...) from the European Central Bank reference rates of the latest working day.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "amount": 100,
              "base": "USD",
              "symbols": "EUR,INR,GBP"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "amount": 100,
              "base": "USD",
              "date": "2026-10-23",
              "plain": "100 USD = 89.341553 EUR, 9494.5055 INR, 74.803895 GBP (ECB, 2026-10-23).",
              "rates": {
                "EUR": 89.341553,
                "GBP": 74.803895,
                "INR": 9494.5055
              },
              "source": "European Central Bank euro reference rates (published around 16:00 CET on working days)"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "amount": {
                      "description": "Amount to convert (default 1)",
                      "type": "number"
                    },
                    "base": {
                      "description": "Base currency, default USD",
                      "type": "string"
                    },
                    "symbols": {
                      "description": "Comma-separated, e.g. EUR,INR (default: all)",
                      "type": "string"
                    }
                  },
                  "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": "2026-10-26T16:41:36.954Z",
    "quality": {
      "l30DaysTotalCalls": 3,
      "l30DaysUniquePayers": 3,
      "lastCalledAt": "2026-10-26T16:41:35.889Z"
    },
    "resource": "https://agent-toolbox.zafermemon87.workers.dev/v1/fx",
    "serviceName": "Agent Toolbox",
    "tags": [
      "exchange-rates",
      "currency",
      "forex",
      "finance",
      "ecb"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Currency exchange rates and conversion for about 30 currencies (USD, EUR, GBP, INR, JPY, CNY ...) from the European Central Bank reference rates of the latest working day."
}

What the leaf hashes

{"body":"4bed9abbd561ebaefbe57965af6060562f0a0f5ae905044e7f0645607f97949a","id":278576,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793042077694040,"prev":265401,"subject":"x402_bazaar:https://agent-toolbox.zafermemon87.workers.dev/v1/fx","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-26 (296695 rows).

1. 0x0f000532d5ec72ca770cdd09ba4d6f32399ca6ff755a66551cefe29e36a23f33
2. 0x8515fd8219b90edc4c9628d6c30392b92eb2705e71787f4284bef467cccb5e1f
3. 0xacbc0840068493573996d0c84fd031222844420fd71ebb86f1bb18d8c839a0df
4. 0xa88eb37dffbbf118fd85382193d18e997fdee78cc5c7e03dc6e9e12793e7807f
5. 0xbcd94f5004a7fef81f84dfc9271f973b5313b59764322a3db2c1537a717d1018
6. 0x125d7ee28cb67037ac7993c0a538ce8bd2dd994ffaf27092051b6c98b9569f3b
7. 0x1b56e535bfdec60ab03a4490234bbddbfcd6063f0b35cc01d7171c66c0ca2ea4
8. 0x31d52ed043f588d3a6b360758cebc79ca5afee66a0c323934bcadf6d983dc4fb
9. 0xa49b73f7083cf57f2d9dcac4f0bc76d5fe9046a9d6f66f1515555d904ef162ad
10. 0x71ffcb65a88e86a1eb62c2f563421c7dd09940039307ac72165f6ab3e008aaa6
11. 0x1e6a5f0042a4b7776e54cf79ce729b60eac17c4eb209cc9613fcd31c9fa0d26c
12. 0x129649b2ec48fbc611fb055c3f5627bda42692beb65d09e853d75bcda4e06239
13. 0x294f7935f78a896b5f246a7c9a7ee1b023720acdb03fff3cd549c63479848ec9
14. 0xb49e8c2564256e5322e375cb619d9ac70fd17c1d1eba9c991bba4cb6428f45cc
15. 0x60582ab4b41e72eb70eb0bce07fbf0fb4d2b62a8bad5be50f5d16d511adc746c
16. 0xc6a4d7899a0f442958e26505011190b7cff2483611c1b94eba9043e0ba9ac36e
17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae