Evidence row 525397

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":525397,"kind":"listing","method":"sync.agentic_market/1","observed_us":1793124756753096,"prev":3334,"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 2026-10-27 (273461 rows).

1. 0x10d7eafada119a7a87b2b36c05a0867865f28c090af0dcff1f28088edd77e321
2. 0x9839238fd33408771482827cb04e9329199ef5872bcf60eb6cf4883d8bd15f1a
3. 0xb507cb85a3d17afaf7d9e7b91c594efcb56e958d50268a8ecba3598178ad457e
4. 0x416ce85684793d86d6e43ca8533b885434983cc24de072b33453140904c7f56a
5. 0xf9e625cf4b134574ba90427c6b93062410df5d8438ec30e5c240a12dcda5d820
6. 0xd83c2a8d0d9070e98028b18dac13dfd42a6f285f187098d92f30be61f8f1c657
7. 0x3fd558cc52971af1e109cb0684790ef923251569dca94fc56278e7ce07960f25
8. 0x1c8db69593df8f8ec1931c461f19cdf7ca62fc866e1078d880471eb0a905678c
9. 0xb51a65bd228fc6a094aeaafa650adea548e5c9f3b9a279967274dddd2e030262
10. 0x9c7266801e87e4661955130191f6962c2123c07a8a6152d1bdbb1b4d9e6ad118
11. 0x1f45fb42c8950b8677f8b081328341df05c76a2daefeed7f5101116aeb98bd62
12. 0x0d3ea2b5e8eb21cf4cb25a0567ff70340d50d07631267f35ddfc7cd1de74eea5
13. 0xedf6ab3c3733ce137d888d3e5f7006ba77ab04b8f1fe576519f7b056959665ee
14. 0x52c5141da0cbee106a30396ee7d1360fd22f55084aca2ca436c8007892775670
15. 0x6913cb48392acb8dc5c940dcdb6e6fc889d544f85dff11da249551a5f027e688
16. 0x518b93854db03dc9fc938883abf30da6eaae5ae0d4336903968fd32a7df8c71b
17. 0x22c1fb9487ee0b9732fa017a0cc321eb27a60c08450d112f755089796e12cb1c
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4