Evidence row 453431

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": 3,
      "l30DaysUniquePayers": 3,
      "lastCalledAt": "2026-10-13T03:18:07.958Z"
    },
    "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":"91dafdbae3cd40e6d4710cffd7969ee99b3a4ec8c29e5d7bad92f7ad7a4c9db5","id":453431,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793100630884050,"prev":123763,"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. 0x183943775a7f1a3545f37209af330b918d5c5da24561ca9bc07ae0063e2581e8
2. 0x2f15999bea931512013d0631695457b66da0e42f5cc7e3ac020045a88551231f
3. 0xe0408217519e1adf676281fae604851303e5696e3da23f6fa4e33acd1af4b85f
4. 0x242ff8c15f1a16b68627bbba4ca2cbcc6528d5fceb443a2d412456e7a57741f6
5. 0x1e255d60dc540271304194670285b0c4cadd2af07bb065daefb1657ec85f994c
6. 0x168e72101054479efedbc7bba427a289ebec10f4976aa8d63060d2c797500192
7. 0xf8dc7b3ed8451e458daee76198621c9ed496f3eef70ed9a653c7d3d51ae6042f
8. 0xc9dc1861758f252b8e97ab4bcde6b1b4af85925165b264c26b0d8c81bf5cab28
9. 0x092a9ce1f90c43bc954fbc156f548e262813377a0155740218d48249ef2e563e
10. 0xb2c61af36f4e381bd25df0021429da8b6682607f7465069a85856784ca9840ba
11. 0x3a308d481ae12b05ff4d5f5a64f87b375db92eb3a8ef3972c9ec3311eb3e6ae7
12. 0x7afa806e5533c63e57a18fda23b38702b370e8b298a35edc0c1de641c8ffcaec
13. 0xca0b37bb3b043ccf0f24c50fccd9c2f22b7e5290df49886008fc2ff55380fdd1
14. 0x2064e3a2b01d0d12d5079bf720a0d0125e9703c55e92de54ad40c302469ec047
15. 0x6913cb48392acb8dc5c940dcdb6e6fc889d544f85dff11da249551a5f027e688
16. 0x518b93854db03dc9fc938883abf30da6eaae5ae0d4336903968fd32a7df8c71b
17. 0x22c1fb9487ee0b9732fa017a0cc321eb27a60c08450d112f755089796e12cb1c
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4