Evidence row 1259346

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": "5",
          "l30DaysUniquePayers": "5"
        },
        "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": "5",
          "l30DaysUniquePayers": "5"
        },
        "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": "5",
          "l30DaysUniquePayers": "5"
        },
        "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":"b04dfba28d15bf96ddd19d13fc66b191335fce837a80930d93e65ecd4c2b6924","id":1259346,"kind":"listing","method":"sync.agentic_market/1","observed_us":1793384215730093,"prev":1036203,"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 2026-10-30 (243099 rows).

1. 0x48a8f6370af3266a8145b9fa15add1dc6944e80cc9c2e8c941cfdfb76bb494b8
2. 0x24f5540bda067dd58bd12547bffb93e22e5d5d340c0318c2784d080a7cf8df00
3. 0x71baf4a8eb544ef207ed788961f788dfd9b5267c56f43dda273234f9b7b47130
4. 0x14b98ee93c8d6562534cd00beb36ddbfbf03670935ead24f0229780f74a70ed3
5. 0x1fc1ad64d261d7d21e0d8c7d4093dd4888c0ddee77dbdc3a5ca26b0aa2e086c5
6. 0x0bee85fe4ab51014f13a73a3801341f096a9246f128d7e3ba861cee59f560dcf
7. 0x7a3a3d49d18310e610cf9d1718580d1b921915c1838e5e800cbd1c8d2cccb4db
8. 0x37f7976e0834570ca8b278e98715cb39a79ac777e7e3c37fb2b7ce350fa1d66b
9. 0xfb0b473ce11ccdf383a8ad86192f0c207edc74390a368244bb10eaac3106fda2
10. 0x752dcd52d12124f8b569401b3acc28245e0656579787b298ec7378662644f440
11. 0x92b466f485a65b10435cb6d2c8e51df9afd133ff49f84fa719af048b03140380
12. 0xbd5c85e2682d76725be130a44cbbcc9d4be383fb556e6028d95854d01e041ed3
13. 0x0b8a485e6ab0668fbad8011e734741b720cdbb463970428343e7f73238a809f9
14. 0x9ace81ddbf101c81e3033efcaf62a4f4ad2b7dc0b97b61a7adf81117108ff2f7
15. 0xa937fac4496d1d79e24c5f12abd33388ef710185b9d82165d4b39af6bd434545
16. 0x910a91495535ac1a9e959d27d607e185616d2d41b45bc7071c6357f426f372d8
17. 0xffe660edb9e5c6e3449a49454634c3e7b2f9fe703e5697f723b021735647ab7e
18. 0x30a81d8fcef4e8f9e2877c62796cfc5612fc1b251127d531dee28f8dbd5c5147

Day root

0x0826c7ad6039e06a2360ca0a4a3a4fe7f2626c6dc19f71a37599386f78b39875

Chained

0x36b4c8a1063758f0b8765fa1bdf75fa92fb543cc183add3e261880ee2bd1f822

Published

On Arc Testnet, block 69923247: 0x8704744146c6967c8abc9e9a99de4db7283b29e840922ea83a69b6fe776e6861