Evidence row 4554

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://x402-qr-api.vercel.app/api/validate"
    ]
  ],
  "name": "x402-qr-api.vercel.app",
  "owner_address": null,
  "raw": {
    "caip2_networks": [
      "eip155:8453"
    ],
    "category": "",
    "description": "",
    "domain": "x402-qr-api.vercel.app",
    "endpoints": [
      {
        "description": "Validate an email address: format check plus a live MX record lookup on its domain",
        "method": "GET",
        "parameters": [],
        "pricing": {
          "amount": "0.002",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "2",
          "l30DaysUniquePayers": "1"
        },
        "serviceName": "",
        "tags": [],
        "url": "https://x402-qr-api.vercel.app/api/validate"
      }
    ],
    "enriched": false,
    "iconUrl": "",
    "id": "x402-qr-api-vercel-app",
    "integrationType": "",
    "isNew": false,
    "name": "x402-qr-api.vercel.app",
    "networks": [
      "Base"
    ],
    "priceSummary": {
      "avgCostBasis": "exact",
      "avgCostPerTransaction": "0.002",
      "currency": "USDC",
      "maxAmount": "0.002",
      "minAmount": "0.002"
    },
    "provider": "x402-qr-api.vercel.app",
    "providerUrl": "",
    "serviceName": "",
    "tags": []
  },
  "source": "agentic_market",
  "summary": ""
}

What the leaf hashes

{"body":"70238f53b1aa44e958c2a24f8d578181774b9039d7f6bfadcc2012e3c536326d","id":4554,"kind":"listing","method":"baseline/1","observed_us":1793025278096961,"prev":null,"subject":"agentic_market:x402-qr-api-vercel-app","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. 0xe987b2a718306a37922f7c855c3dabefaa90f98024f0acd0989eca005b9e95c6
2. 0x58b6d6ade172fb4a94c7ef76d7a7901f2d053caa47777bb12d51518ce7ae010a
3. 0x2e0170616e04e147ea89ec849c1f8ee53d6e7147bbf7488db0763aaadf99f010
4. 0x839f41bcf46a94845c5f3096889beec77b139ef894140781b9d9c0e818631e7b
5. 0xc833b70761eb0bbf57ca769afbd1ae978ade6b5ad65e26f3f021cd5dbc43f8e8
6. 0x1e6ffcfbedcb4583dd97b411be5edbb5380a5c24e122e5f8270be5c616527bf4
7. 0x1abc596ffd6eb498ac25793c7dd314ea450d7d6cb676033eebf034ddc9bcb8c8
8. 0x52c8c43026c7e0e1b0412fb93368eb9541e0d9f9f2c36947690c520c8492691a
9. 0x84bdc8c927c17d43ee003624d95e5817354d799e150e47f3e93a1fcd38388e15
10. 0x20aad7b310e719b68d461db419f1acf1d0f86794a395a52b3f5019b01d46fbbc
11. 0x2ec584f2a0466a34409d72f745f85d43c3f2da79c7fe353433c8b601cf9f2050
12. 0x22a204f0cf299dd3152f1542ba9998ff7665390da1ede6e58d06b8a7b2a107ee
13. 0xec98ca25cb12ffed7c3e1373971719ce414ee6deecd1e7724b2979e2c356d99f
14. 0x614d844c9e0509d9f9e63697aa2935555bce5f13695a8dc0047aa9e9898d70b3
15. 0x95657a7d540ed6cac0bde9995782333b2562a9a6641853269ac95148827410f0
16. 0x5fb5dda563336cd1bc1b9f44c52b76237ae72ed2145cb9290f39f304ca7dd678
17. 0x74a0a08e4e7ab9aa5bfbead33dec7e1c7e8e364cff69a63720d764bbe987aadc

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae