Evidence row 527181

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": "2026-10-27T09:55:02.312Z",
    "quality": {
      "l30DaysTotalCalls": 18,
      "l30DaysUniquePayers": 5,
      "lastCalledAt": "2026-10-27T09:55:02.066Z"
    },
    "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":"9aabe7dfb9bc9f98008615887a58a83a7868b48468e4961ee119e25bb2a3be20","id":527181,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793124795720264,"prev":452240,"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 2026-10-27 (273461 rows).

1. 0xca5aaf37ce06586424987cb3015ea8439346af198be83cb326a0bbaaff1f5e5b
2. 0xd8b2251971c854e72a1997eac8d5ec76328dff33d8cafae5d59244cf3025b8ef
3. 0xfbf057f7b0cdbab2dd6de37c46b72cb2ec2ace8c3a608afd8ab04bf2c64c571c
4. 0x94cce7893861e18cd5a049de978061dc01d71b5e882eb1acf5d523ada184e0ba
5. 0xe4b9706f852cb9edba923a1139a4be581ade010f1b02b5b94ffbf939fe0e55ce
6. 0x708963202b6f6204784cb3539b02ec1aba36707b92be98e956f4abe1608d7607
7. 0x90fc6af315e2ff5964168620c8ff79f77371dfb592a50af47e90761d86ccc51e
8. 0x56eba309a9b678c004a98ac04f4f28027f696a0b8aa60927eb84e3caaf1e495b
9. 0x1c2168c3ca7829a83c7c239960c41b34bff4d006cde481ee91e6b2f40777aae3
10. 0x70be1cb0b69928aef504db8bee443a45d3f70036499af4631a01b842ed767c17
11. 0x031a5189f3cedc6cdc917093e3bc1856d6d43693459685f550cf8d6caf1cc0a8
12. 0x7142f07ffeddbd14ceabecb9ab27a468e9ab58a2fca5472c5c6a93f3e98f173e
13. 0x938752e9acd199cd15f468392bc2dd8eefc52293e7144e30b87b241ca6b2513b
14. 0xcc49fd573532e5a29f5be4033f62a2eff71456c020bd2258312b98e95cfe301e
15. 0x969cd44e5a4e8dc3110540398fbf689659eb51df735c1cda5d8f021ef9ff5683
16. 0xa94627de1af0e823832e05a9069b304ecccb8c0cdb8f9cfc4f2039bfb9799dc5
17. 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4