Evidence row 278617

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://agents.crowdspark.me/v1/fx/rates"
    ]
  ],
  "name": "Agent Tools",
  "owner_address": "0x0dea0030a17bf886543a757c55924710258c2eec",
  "raw": {
    "accepts": [
      {
        "amount": "1000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0x0dEA0030A17BF886543a757c55924710258c2eec",
        "scheme": "exact"
      }
    ],
    "description": "Currency exchange rates (European Central Bank reference rates) for price conversion, invoicing and travel budgets. Latest or historical by date.",
    "extensions": {
      "bazaar": {
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "base": "USD",
              "symbols": "EUR,JPY"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "base": "USD",
              "date": "2026-10-22",
              "rates": {
                "EUR": 0.89246,
                "JPY": 157.05
              },
              "source": "European Central Bank via Frankfurter"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "properties": {
            "input": {
              "additionalProperties": false,
              "properties": {
                "method": {
                  "enum": [
                    "GET"
                  ],
                  "type": "string"
                },
                "queryParams": {
                  "properties": {
                    "base": {
                      "description": "Base currency, e.g. USD",
                      "type": "string"
                    },
                    "date": {
                      "description": "YYYY-MM-DD, optional",
                      "type": "string"
                    },
                    "symbols": {
                      "description": "Comma list, optional",
                      "type": "string"
                    }
                  },
                  "required": [],
                  "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": "2026-10-26T15:48:15.612Z",
    "quality": {
      "l30DaysTotalCalls": 6,
      "l30DaysUniquePayers": 4,
      "lastCalledAt": "2026-10-26T15:48:15.013Z"
    },
    "resource": "https://agents.crowdspark.me/v1/fx/rates",
    "serviceName": "Agent Tools",
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Currency exchange rates (European Central Bank reference rates) for price conversion, invoicing and travel budgets. Latest or historical by date."
}

What the leaf hashes

{"body":"893515d7f5f109254d7a3dffc8320e3fd8ccbf615a0f6ddb9b50eb2c293bab56","id":278617,"kind":"listing","method":"sync.x402_bazaar/1","observed_us":1793042078263259,"prev":261431,"subject":"x402_bazaar:https://agents.crowdspark.me/v1/fx/rates","subject_kind":"source_record"}

Proof

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

1. 0x8e060f99738c5b454e60f466a75a5b3d08a61c378e34c5812fa56a88f4509086
2. 0x0fea98fd46f9d0c0f556daff3b5d5500bafc0b291604137cd18fa62ee01d9ff0
3. 0x349fed690c58a0b73435ff32173f4556208442053462ca247c7167ac7df4c5cd
4. 0x9481b82a5aa260209da8628a5bec4a666f4c312a4fe8cbc6dea5eb233191f5a7
5. 0x19ce2e3e33d8d07ac353b4e4eedf92932d0a46302dcc5fbba2c48b7ee781fdb8
6. 0x552b00baf80d829fcfc8d3a781b9b085a324ebc5129a3ffdb1aa83170851c6d3
7. 0xe72a232a6cc1743aeb550aa6bc810957f90fc681237601e7372d9a9c241164ad
8. 0x9c7ab549d5d229cfacfdb284e94a6002fefcd4eef2dadbbb6e5de873ded26927
9. 0xfa1089efbaaf14bb6cca5710e78195acc1ddc9216d361c9935c5eaf75bbf60c6
10. 0xcd309087e391a4bbf7ab28b9f7073de601c743989827ee9f4afe481b1c005fc6
11. 0x6880847de0a4b4b8c14408244df84ff11ac20d4049a575846d0700a7a91132ca
12. 0x59a4efa65a01e4e2abdb3b8b7bb673db6d1c72e0f9d52dd2f94777b14a5b061c
13. 0xc0cb184c9bdf71abcf18fda97bd59289153d120dbf8fee9f517b63bf303deb95
14. 0xf0edabbb9ba0d643e5505d19d07637eb6f6aed0a1c7356af43ae7d84ae9ef0c5
15. 0xf0bd63870f0bb378fa300bd33563050dcb7b3e02b44eb3ee550c1c534ec4b246
16. 0x1ac20d30773e1f4f2f811540e9a99b5cca9177c9e2e029acc0d80cf3f1d11f0f
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae