Evidence row 548601

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://vending-machine-seven.vercel.app/api/v/fx-rate"
    ]
  ],
  "name": "vending-machine-seven.vercel.app/api/v/fx-rate",
  "owner_address": "0xc648116b5debe4af7d78838aa468d07e0a9ab697",
  "raw": {
    "accepts": [
      {
        "amount": "3000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 120,
        "network": "eip155:8453",
        "payTo": "0xc648116b5deBE4AF7D78838AA468d07e0A9Ab697",
        "scheme": "exact"
      }
    ],
    "description": "Live fiat FX rates (Frankfurter/ECB primary, open.er-api fallback) for cross-border agents",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "pathParams": {},
            "queryParams": {
              "base": "USD",
              "symbols": "EUR,GBP"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "base": "USD",
              "ok": true,
              "rates": {
                "EUR": 0.92,
                "GBP": 0.79
              },
              "service": "fx-rate",
              "source": "frankfurter.dev (ECB)"
            },
            "type": "json"
          }
        },
        "routeTemplate": "/api/v/fx-rate",
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "pathParams": {
                  "type": "object"
                },
                "queryParams": {
                  "additionalProperties": false,
                  "properties": {
                    "base": {
                      "description": "ISO 4217 base, default USD",
                      "type": "string"
                    },
                    "symbols": {
                      "description": "Comma list e.g. EUR,GBP,JPY",
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "base": {
                      "type": "string"
                    },
                    "ok": {
                      "type": "boolean"
                    },
                    "rates": {
                      "type": "object"
                    },
                    "service": {
                      "type": "string"
                    },
                    "source": {
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        }
      }
    },
    "lastUpdated": "2026-10-27T10:14:56.478Z",
    "quality": {
      "l30DaysTotalCalls": 4,
      "l30DaysUniquePayers": 4,
      "lastCalledAt": "2026-10-27T10:14:56.358Z"
    },
    "resource": "https://vending-machine-seven.vercel.app/api/v/fx-rate",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Live fiat FX rates (Frankfurter/ECB primary, open.er-api fallback) for cross-border agents"
}

What the leaf hashes

{"body":"b241923f59a3317ac54695ed530c8be94130917316c8fe4b80afd76e36c381ea","id":548601,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793133318007205,"prev":453431,"subject":"x402_bazaar:https://vending-machine-seven.vercel.app/api/v/fx-rate","subject_kind":"source_record"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0xef4f8ef51df2ef436a57a7f3141fccad2786b3a8ba70431458576d6a7112a6f2
2. 0x56aa02b0c1965e50d901a5988542760b92383179cb66fc46f8dea47274c908b9
3. 0x5ed2d224d1f9ad93bc5692587fe2d6f0cd5d3100d9a97fa16f24baac6a684557
4. 0x462e6fc3603c4041fbec2a8b0290e983c381cf726466d206796e5b83cf732590
5. 0x3a65ef313e59c7734954c9b36456d8870396f6549b249df06fe32f8ba0f8b18f
6. 0x5456d182c9d3a6f58712525cfaa9f88912bd0950eb1f50cf2663a7fc660e44f0
7. 0x9be765911f3bc0540bc03310ce640f1c167b624d90a4025c9a4ff389fb3a1950
8. 0xc480e77bed9a492d146c23e72ecfe954d0ae1ad973a3d9b550a2b281cd5e5202
9. 0x930b1fcfbe4599560c2ba785ea038c4ecb71dbfac328de203327705d7df6ca65
10. 0xa2f7ee67cd3d18eb6a574f673a6de5baa7d1c805f36fc95b0d45b03af8e8f907
11. 0x1b4399bae757271424da8a4da03b907adf56af6574a865598cf68ad834ce7e01
12. 0xc0448a83784154aec794ac7a249e46b6f618529dfd246ef492240c5d9b62d921
13. 0xe0ddf3e1c8349b7fe55d4b2a6864486a77de3e3c0e371df44d69aeb837cfd79c
14. 0xce1471491ffb52101d7cd9884cca0fb37a9496f6e8250375054907d24a35d04f
15. 0x56f7109d4cde42492651beb1237c13cdcbf95e6fee2b2482391a2388e04c4629
16. 0x8745bd887f5ce9f7a49558fd2b04cdcd97a05ea9f8a23f62d0e80cb13d328b0f
17. 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4