Evidence row 3334

What was observed

{
  "endpoints": [
    [
      "x402",
      "https://plainchain.appin60.com/v1/balances"
    ],
    [
      "x402",
      "https://plainchain.appin60.com/v1/bazaar/search"
    ],
    [
      "x402",
      "https://plainchain.appin60.com/v1/fact"
    ],
    [
      "x402",
      "https://plainchain.appin60.com/v1/fortune"
    ],
    [
      "x402",
      "https://plainchain.appin60.com/v1/gas"
    ],
    [
      "x402",
      "https://plainchain.appin60.com/v1/x402/echo"
    ]
  ],
  "name": "plainchain.appin60.com",
  "owner_address": null,
  "raw": {
    "caip2_networks": [
      "eip155:8453"
    ],
    "category": "",
    "description": "",
    "domain": "plainchain.appin60.com",
    "endpoints": [
      {
        "description": "Wallet balances with USD values on Base, Arbitrum, Ethereum or Optimism: native ETH plus USDC, USDT, WETH and the chain's major tokens, plus up to 10 extra token addresses you pass. Returns a USD total. Use before paying, bridging or reporting a portfolio.",
        "method": "GET",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "0xB442daCAE60C07bb5dB8f33C8a6c1572d8F24e83",
            "group": "query",
            "name": "address",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "base",
            "group": "query",
            "name": "chain",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.001942",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "3",
          "l30DaysUniquePayers": "3"
        },
        "serviceName": "",
        "tags": [],
        "url": "https://plainchain.appin60.com/v1/balances"
      },
      {
        "description": "Find x402 APIs that agents actually pay for: keyword search over the whole Coinbase x402 Bazaar (31,000+ paid endpoints), ranked by distinct paying wallets in the last 30 days. Filter by max price and network. Returns URL, method, price, 30-day payers and calls, last paid call. Use to pick a proven seller before spending.",
        "method": "GET",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "0.01",
            "group": "query",
            "name": "max_price",
            "required": false,
            "type": "string"
          },
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "gas price base",
            "group": "query",
            "name": "q",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.001942",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "4",
          "l30DaysUniquePayers": "4"
        },
        "serviceName": "",
        "tags": [],
        "url": "https://plainchain.appin60.com/v1/bazaar/search"
      },
      {
        "description": "A random crypto history fact (Bitcoin genesis, Pizza Day, The Merge, EIP-1559, x402 and HTTP 402, USDC, Base...), picked by the latest Base block hash. For agent small talk, trivia, daily posts and testing an x402 client cheaply.",
        "method": "GET",
        "parameters": [],
        "pricing": {
          "amount": "0.001042",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "4",
          "l30DaysUniquePayers": "4"
        },
        "serviceName": "",
        "tags": [],
        "url": "https://plainchain.appin60.com/v1/fact"
      },
      {
        "description": "A crypto fortune cookie: one short line of on-chain wisdom, picked by the latest Base block hash so anyone can verify the draw. For agent greetings, daily posts, games and demos of x402 payments.",
        "method": "GET",
        "parameters": [],
        "pricing": {
          "amount": "0.001042",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "3",
          "l30DaysUniquePayers": "3"
        },
        "serviceName": "",
        "tags": [],
        "url": "https://plainchain.appin60.com/v1/fortune"
      },
      {
        "description": "Current gas price on Base, Arbitrum, Ethereum or Optimism, with the USD cost right now of an ETH transfer, ERC-20 transfer, DEX swap and NFT mint. Use before sending a transaction to pick a chain or decide whether to wait.",
        "method": "GET",
        "parameters": [
          {
            "default": null,
            "description": "",
            "enumValues": [],
            "example": "base",
            "group": "query",
            "name": "chain",
            "required": false,
            "type": "string"
          }
        ],
        "pricing": {
          "amount": "0.001042",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "4",
          "l30DaysUniquePayers": "4"
        },
        "serviceName": "",
        "tags": [],
        "url": "https://plainchain.appin60.com/v1/gas"
      },
      {
        "description": "Debug your x402 client on Base mainnet for $0.001: returns the payment payload your client actually signed and sent, decoded: version, header used, scheme, amount, validity window, and whether it echoed extensions.bazaar (needed for Bazaar cataloging) and resource/accepted.",
        "method": "GET",
        "parameters": [],
        "pricing": {
          "amount": "0.001042",
          "currency": "USDC",
          "maxAmount": "",
          "minAmount": "",
          "network": "eip155:8453",
          "scheme": "exact"
        },
        "providerName": "",
        "quality": {
          "l30DaysTotalCalls": "3",
          "l30DaysUniquePayers": "3"
        },
        "serviceName": "",
        "tags": [],
        "url": "https://plainchain.appin60.com/v1/x402/echo"
      }
    ],
    "enriched": false,
    "iconUrl": "",
    "id": "plainchain-appin60-com",
    "integrationType": "",
    "isNew": false,
    "name": "plainchain.appin60.com",
    "networks": [
      "Base"
    ],
    "priceSummary": {
      "avgCostBasis": "exact",
      "avgCostPerTransaction": "0.001342",
      "currency": "USDC",
      "maxAmount": "0.001942",
      "minAmount": "0.001042"
    },
    "provider": "plainchain.appin60.com",
    "providerUrl": "",
    "serviceName": "",
    "tags": []
  },
  "source": "agentic_market",
  "summary": ""
}

What the leaf hashes

{"body":"7c5bd5eab44fb458790131221c0439160da3d5b8d9b5a4d9f1cb1323e10d8b17","id":3334,"kind":"listing","method":"baseline/1","observed_us":1793025272776357,"prev":null,"subject":"agentic_market:plainchain-appin60-com","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. 0x95931136863904cec5a594bdf39da8bcf88fcfed4b8e01d0d815b68669d9ca8e
2. 0x389b023e8d3ea5ca95c2c6f7a2f5f288b601801b2fa8474b0ba647fd7b6d0daf
3. 0x33abee8d76ba9b82673059ec4113c7d53ebe35ef93671c4c0989da047125550a
4. 0x149f713d18a913e5e7171ebd83fc0fe8603f1eb5ed6949869d244b0fb6a2e815
5. 0xd1549db70efde8d3fa3b954e80ef56f1df313a67ae0febd293c18982e6d7c90a
6. 0x562c4508724f97dbce323cfabbde1420564f173ed7e53c99cf0123a29b38ec61
7. 0x59d0c698fbb3835edc945687f56c7e9e426a707105f9210870af0e8ca9a4894e
8. 0xe478372ccb72131a035e95b643bc0993f631d716016c92c18006aeda015717ac
9. 0xeaa83a242ff2978695e9e1cfc4a7b501fae86b1985270b23154a23a14845e6f3
10. 0x93fdf56e11ca55e7de8840750dc407c579d998851eeba81adf9b02fc56cf0786
11. 0x410382a743218ee37cce3087a0bdbcb3f5a456fc78a975bb16e175d9ceedd913
12. 0x12169ac86722058ecf46a1b83c56e8b21899ab108a12c5a4429da74c5d191294
13. 0xb314422bc93e7f1c0b706c67f5fff96c5ddf74934bb2fe8ab6291ae016907e37
14. 0x49062da782c4f73855ddd5fdd51840749f928b5f17d1ce75ac50f2d829104e72
15. 0xf0bd63870f0bb378fa300bd33563050dcb7b3e02b44eb3ee550c1c534ec4b246
16. 0x1ac20d30773e1f4f2f811540e9a99b5cca9177c9e2e029acc0d80cf3f1d11f0f
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae