Evidence row 117911

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://pay.brianbooms.com/api/v1/data/fx-convert"
    ]
  ],
  "name": "Steward",
  "owner_address": "0xa98e8c6cbc64b7bb30fd0d2015ab24814c661839",
  "raw": {
    "accepts": [
      {
        "amount": "10000",
        "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:8453",
        "payTo": "0xa98e8c6cbc64b7bb30fd0d2015ab24814c661839",
        "scheme": "exact"
      },
      {
        "amount": "12090",
        "asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:137",
        "payTo": "0xa98e8c6cbc64b7bb30fd0d2015ab24814c661839",
        "scheme": "exact"
      },
      {
        "amount": "12090",
        "asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:42161",
        "payTo": "0xa98e8c6cbc64b7bb30fd0d2015ab24814c661839",
        "scheme": "exact"
      },
      {
        "amount": "12090",
        "asset": "0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E",
        "extra": {
          "name": "USD Coin",
          "version": "2"
        },
        "maxTimeoutSeconds": 300,
        "network": "eip155:43114",
        "payTo": "0xa98e8c6cbc64b7bb30fd0d2015ab24814c661839",
        "scheme": "exact"
      }
    ],
    "description": "Use when an agent needs a fiat conversion with any base currency — Fixer and OXR lock the base on free tiers; this one doesn't. ECB reference rates, honest as_of timestamps, no subscription. Pass from/to codes and amount. Use permitted: build it into your products and services, paid or free. Raw redistribution of the feed itself is prohibited.",
    "extensions": {
      "bazaar": {
        "discoverable": true,
        "iconUrl": "https://brianbooms.com/favicon.ico",
        "info": {
          "input": {
            "method": "GET",
            "queryParams": {
              "amount": "Amount to convert. Example: 100",
              "from": "3-letter code, any base. Example: EUR",
              "to": "3-letter code. Example: JPY"
            },
            "type": "http"
          },
          "output": {
            "example": {
              "amount": 100,
              "data_source": "Frankfurter.app (ECB)",
              "from": "EUR",
              "product": "FX conversion",
              "rate": 162.44,
              "result": 16244,
              "to": "JPY"
            },
            "type": "json"
          }
        },
        "schema": {
          "$schema": "https://json-schema.org/draft/2020-12/schema",
          "additionalProperties": true,
          "properties": {
            "amount": {
              "description": "Amount to convert. Example: 100",
              "type": "string"
            },
            "from": {
              "description": "3-letter code, any base. Example: EUR",
              "type": "string"
            },
            "to": {
              "description": "3-letter code. Example: JPY",
              "type": "string"
            }
          },
          "type": "object"
        },
        "serviceName": "Steward",
        "tags": [
          "fx",
          "forex",
          "data-api",
          "steward",
          "x402"
        ]
      }
    },
    "lastUpdated": "2026-10-20T16:24:33.726Z",
    "quality": {
      "l30DaysTotalCalls": 2,
      "l30DaysUniquePayers": 1,
      "lastCalledAt": "2026-10-20T16:24:32.643Z"
    },
    "resource": "https://pay.brianbooms.com/api/v1/data/fx-convert",
    "serviceName": "Steward",
    "tags": [
      "fx",
      "forex",
      "data-api",
      "steward",
      "x402"
    ],
    "type": "http",
    "x402Version": 2
  },
  "source": "x402_bazaar",
  "summary": "Use when an agent needs a fiat conversion with any base currency — Fixer and OXR lock the base on free tiers; this one doesn't. ECB reference rates, honest as_of timestamps, no subscription. Pass from/to codes and amount. Use permitted: build it into your products and services, paid or free. Raw redistribution of the feed itself is prohibited."
}

What the leaf hashes

{"body":"b22ce00747acfe6fd575759c0f917ae729b23e4370ce637c5fb5f0aa5ca38bb9","id":117911,"kind":"listing","method":"baseline/1","observed_us":1793025612042776,"prev":null,"subject":"x402_bazaar:https://pay.brianbooms.com/api/v1/data/fx-convert","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. 0x9a1f531b34834e68b63d13c7dec46dd91db5d0adc43788907f3968e946364ae2
2. 0xf8d765af5744ce301fd34eaf210dbe11d6004d3174eb63344c7de68463d6c72d
3. 0x4ab818a34e467b5ff02f9383d82c3ed2474e1e54a419e8a3e545442ed5d7ec65
4. 0x6a3a4ef7a99c90352e1ff7ae9d285d69c755ecb455c2859642b9dc6aa8e96d0b
5. 0x93eff408a0eb4c0599d5743f154f50252315771b440901c5a1ec7c7dd4dad39d
6. 0x1499e31de59fceaa816fdfc1304e4e889138f34569946f5fbb2d597c850126ae
7. 0x711a50e7b5d628029fa428cf9eebb7f27245bcf856932ac5d21a67ffb489da73
8. 0xec87a765eebcc5ea319a75f7ec7b2d7ec32cbdc54bbc501a0a0de36b8a8023ea
9. 0xcd45fafe8adfe77a8f713da013a9a729663a51ac086a5a47fb524f27e9a9de55
10. 0x5f0ab04037f02b99972d6b76445e37cd5ba1ec6ac47f36a9b265411ab683344b
11. 0xee5ef8d84c329a24d375330252426182463aa2a536127b218e61007c87101323
12. 0xfee33ee0189dc82c649bd0324796a297b897507b2fddbbe2eff331c40c960ce2
13. 0x239fd39716710e7412bd120c373072b4c0d8b11bb9ee431dad62a2ce57b3d6f4
14. 0x49062da782c4f73855ddd5fdd51840749f928b5f17d1ce75ac50f2d829104e72
15. 0xf0bd63870f0bb378fa300bd33563050dcb7b3e02b44eb3ee550c1c534ec4b246
16. 0x1ac20d30773e1f4f2f811540e9a99b5cca9177c9e2e029acc0d80cf3f1d11f0f
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae