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Evidence row 74975

Observed , by baseline/1.

Kind
listing
About
source_record x402_bazaar:https://exchange.use.x402atlas.com/currency-exchange-rate
Recorded
Previous row
None: the first of its kind about this subject
Body SHA-256
f1a2fbfb804415b88305b56f63f6974cdfa9d20d5027f8e1f5bd7734a48b3b80
Leaf
0xeea145ced16325a6c3f6d59081d43b6877b64030fa9cc028fdf9af1720fe1258

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://exchange.use.x402atlas.com/currency-exchange-rate"
    ]
  ],
  "name": "Currency Exchange Rate",
  "owner_address": "0x8c128f1ee62bb5e47867cfbae2ad89be325df1b2",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "merchant": "x402Atlas",
          "name": "USD Coin",
          "tier": "standard",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "merchant": "x402Atlas",
          "name": "USD Coin",
          "tier": "standard",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:137",
        "payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "merchant": "x402Atlas",
          "name": "USD Coin",
          "tier": "standard",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:42161",
        "payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
        "scheme": "exact"
      },
      {
        "amount": "10000",
        "asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
        "extra": {
          "feePayer": "D6ZhtNQ5nT9ZnTHUbqXZsTx5MH2rPFiBBggX4hY1WePM",
          "merchant": "x402Atlas",
          "tier": "standard"
        },
        "maxTimeoutSeconds": 300,
        "network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
        "payTo": "ASt6xvRyQ7ntERsmcYVMdLqZvz1GEN8Fzexzq62tXrNQ",
        "scheme": "exact"
      }
    ],
    "description": "Get current exchange rate between two currencies using ECB data. Supports all major currencies. Returns rate, inverse rate, and date.",
    "extensions": {
      "bazaar": {
        "category": "finance",
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "from": "USD",
              "to": "EUR"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "date": "2026-10-07",
              "from": "USD",
              "inverse_rate": 1.176471,
              "rate": 0.85,
              "to": "EUR"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "from": {
                      "default": "USD",
                      "description": "Optional base currency, 3-letter ISO 4217 code from the ECB set",
                      "enum": [
                        "AUD",
                        "BGN",
                        "BRL",
                        "CAD",
                        "CHF",
                        "CNY",
                        "CZK",
                        "DKK",
                        "EUR",
                        "GBP",
                        "HKD",
                        "HUF",
                        "IDR",
                        "ILS",
                        "INR",
                        "ISK",
                        "JPY",
                        "KRW",
                        "MXN",
                        "MYR",
                        "NOK",
                        "NZD",
                        "PHP",
                        "PLN",
                        "RON",
                        "SEK",
                        "SGD",
                        "THB",
                        "TRY",
                        "USD",
                        "ZAR"
                      ],
                      "type": "string"
                    },
                    "to": {
                      "default": "EUR",
                      "description": "Optional quote currency, 3-letter ISO 4217 code from the ECB set, must differ from `from`",
                      "enum": [
                        "AUD",
                        "BGN",
                        "BRL",
                        "CAD",
                        "CHF",
                        "CNY",
                        "CZK",
                        "DKK",
                        "EUR",
                        "GBP",
                        "HKD",
                        "HUF",
                        "IDR",
                        "ILS",
                        "INR",
                        "ISK",
                        "JPY",
                        "KRW",
                        "MXN",
                        "MYR",
                        "NOK",
                        "NZD",
                        "PHP",
                        "PLN",
                        "RON",
                        "SEK",
                        "SGD",
                        "THB",
                        "TRY",
                        "USD",
                        "ZAR"
                      ],
                      "type": "string"
                    }
                  },
                  "type": "object"
                },
                "type": {
                  "const": "http",
                  "type": "string"
                }
              },
              "required": [
                "type",
                "method"
              ],
              "type": "object"
            },
            "output": {
              "properties": {
                "example": {
                  "properties": {
                    "date": {
                      "description": "ECB publication date (YYYY-MM-DD) of the rate; last business day on weekends/holidays.",
                      "format": "date",
                      "type": "string"
                    },
                    "from": {
                      "description": "Base currency code, upper-cased.",
                      "type": "string"
                    },
                    "inverse_rate": {
                      "description": "Units of `from` per 1 unit of `to` (1/rate, 6 decimals).",
                      "type": "number"
                    },
                    "rate": {
                      "description": "Units of `to` per 1 unit of `from`.",
                      "type": "number"
                    },
                    "to": {
                      "description": "Quote currency code, upper-cased.",
                      "type": "string"
                    }
                  },
                  "required": [
                    "from",
                    "to",
                    "rate",
                    "inverse_rate",
                    "date"
                  ],
                  "type": "object"
                },
                "type": {
                  "type": "string"
                }
              },
              "required": [
                "type"
              ],
              "type": "object"
            }
          },
          "required": [
            "input"
          ],
          "type": "object"
        },
        "tags": [
          "currency",
          "exchange-rate",
          "forex",
          "fx",
          "ecb"
        ]
      }
    },
    "lastUpdated": "2026-10-19T11:33:13.929Z",
    "quality": {
      "l30DaysTotalCalls": 5,
      "l30DaysUniquePayers": 4,
      "lastCalledAt": "2026-10-19T11:33:13.824Z"
    },
    "resource": "https://exchange.use.x402atlas.com/currency-exchange-rate",
    "serviceName": "Currency Exchange Rate",
    "tags": [
      "currency",
      "exchange-rate",
      "forex",
      "fx",
      "ecb"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Get current exchange rate between two currencies using ECB data. Supports all major currencies. Returns rate, inverse rate, and date."
}

What the leaf hashes

{"body":"f1a2fbfb804415b88305b56f63f6974cdfa9d20d5027f8e1f5bd7734a48b3b80","id":74975,"kind":"listing","method":"baseline/1","observed_us":1793025489894649,"prev":null,"subject":"x402_bazaar:https://exchange.use.x402atlas.com/currency-exchange-rate","subject_kind":"source_record"}

Proof

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

  1. 0xeea17aca5654b56912bbbcfefa24932bcdd75fd608f77ba2f89ef3bc09231833
  2. 0x5e902a700b677dcf4dfc902b749269d47e5f9807db80752f1f16a95b9dd65eb0
  3. 0x2b9b3b529c23d77089ec7b3fc771a716c5f7f4901de8930cb0ee661e11a6f563
  4. 0x8761648b4c3606d2841f122ddc46411494950835c801df2dc0d9d0bdf3e1838a
  5. 0xf2a190199b954f05b9761c0255d088f287be6924efa54b82412fde55b3d7194c
  6. 0xfad4f48d7e55a7c0ee426e609a4193361d11f6820e316b7a26f9a45cd7b5b616
  7. 0x0d483285de2fd94f806eb3e49141b3410f9cc58f4095b6477fa04a7a7172dd0c
  8. 0x5a65aa65cc80cd9024589e5e42ed99bccc0a229497f5dcf2ca1211915b2ceff8
  9. 0xc2802e175466f90063abc5e22614fde16de6a0b7d11b3f61692936b273000d81
  10. 0x6a342165fe5c2fa8b0f8cd8b99ab88e01f9e0a758f16ba9193ba775d71446fbb
  11. 0xd1f02e907670bf2f4c72056210a7d4ee252934850293a927f852acd3952f44a4
  12. 0xb0cc0b4ce5a68e83d3e3e55b0387f828adf6f5eb6cfa666d75f6e16ed9d89c1f
  13. 0x746e9e5b6765727b6b96f41204cc115b0302259f6c67be0cf0efbf245601d500
  14. 0x614d844c9e0509d9f9e63697aa2935555bce5f13695a8dc0047aa9e9898d70b3
  15. 0x95657a7d540ed6cac0bde9995782333b2562a9a6641853269ac95148827410f0
  16. 0x5fb5dda563336cd1bc1b9f44c52b76237ae72ed2145cb9290f39f304ca7dd678
  17. 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc
Day root
0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8
Chained
0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a
Published
On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae

How to check it · This row as JSON