Evidence row 2940022

What was observed

{
  "count": 4,
  "tools": [
    {
      "description": "List recent ERC-20 transfers involving an address (bounded, newest first) with direction, decoded value, block, tx hash and explorer links. Paid: $0.02 USDC on Base via x402.",
      "inputSchema": {
        "properties": {
          "address": {
            "description": "0x-prefixed 20-byte address to read.",
            "type": "string"
          },
          "blocks": {
            "default": 2000,
            "maximum": 9000,
            "minimum": 50,
            "type": "integer"
          },
          "chain": {
            "default": "base",
            "description": "Which public chain to read from.",
            "enum": [
              "base",
              "bsc",
              "ethereum",
              "polygon"
            ],
            "type": "string"
          },
          "limit": {
            "default": 20,
            "maximum": 50,
            "minimum": 1,
            "type": "integer"
          },
          "token": {
            "description": "ERC-20 token: \"USDC\" (default) or a 0x address.",
            "type": "string"
          }
        },
        "required": [
          "address"
        ],
        "type": "object"
      },
      "name": "address_activity"
    },
    {
      "description": "Get a transaction's status, block, timestamp, from/to, value, gas used and fee with explorer links. Paid: $0.01 USDC on Base via x402.",
      "inputSchema": {
        "properties": {
          "chain": {
            "default": "base",
            "description": "Which public chain to read from.",
            "enum": [
              "base",
              "bsc",
              "ethereum",
              "polygon"
            ],
            "type": "string"
          },
          "txHash": {
            "description": "0x-prefixed transaction hash.",
            "type": "string"
          }
        },
        "required": [
          "txHash"
        ],
        "type": "object"
      },
      "name": "tx_status"
    },
    {
      "description": "Verify an on-chain payment/transfer against an expected recipient and amount. Returns MATCH/MISMATCH/NOT_FOUND/ERROR with on-chain evidence. Paid: $0.02 USDC on Base via x402.",
      "inputSchema": {
        "properties": {
          "chain": {
            "default": "base",
            "description": "Which public chain to read from.",
            "enum": [
              "base",
              "bsc",
              "ethereum",
              "polygon"
            ],
            "type": "string"
          },
          "expectedAmount": {
            "description": "Decimal amount in human units, e.g. \"1.50\".",
            "type": "string"
          },
          "expectedRecipient": {
            "description": "0x-prefixed address that should have received the transfer.",
            "type": "string"
          },
          "token": {
            "description": "\"USDC\" (default) or a 0x ERC-20 address.",
            "type": "string"
          },
          "txHash": {
            "description": "0x-prefixed transaction hash.",
            "type": "string"
          }
        },
        "required": [
          "txHash",
          "expectedRecipient",
          "expectedAmount"
        ],
        "type": "object"
      },
      "name": "verify_receipt"
    },
    {
      "description": "Read a wallet's decoded balance (native, USDC, or any ERC-20) pinned to a block number, with explorer evidence. Paid: $0.01 USDC on Base via x402.",
      "inputSchema": {
        "properties": {
          "address": {
            "description": "0x-prefixed 20-byte address to read.",
            "type": "string"
          },
          "chain": {
            "default": "base",
            "description": "Which public chain to read from.",
            "enum": [
              "base",
              "bsc",
              "ethereum",
              "polygon"
            ],
            "type": "string"
          },
          "token": {
            "description": "\"USDC\" (default), \"native\", or a 0x ERC-20 address.",
            "type": "string"
          },
          "tokenDecimals": {
            "description": "Optional fallback decimals when a custom token's decimals() is unreadable.",
            "type": "integer"
          }
        },
        "required": [
          "address"
        ],
        "type": "object"
      },
      "name": "wallet_balance"
    }
  ]
}

What the leaf hashes

{"body":"a8c7e299b016201b879d7ade1a55d86de7b88b968f8d9b3c643efa8db59455bd","id":2940022,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793763278577201,"prev":null,"subject":"401c150b-ebc8-4660-8155-d4bcd108ca32","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-04 (424109 rows).

1. 0xcd4b19049f56160c3dbdbf733fd21f326fa16e5a685f179bb717e15a0cc8d138
2. 0x66b5d4281496ae976df702bc49692cf1264ed5f8a43a7fd1cb96e0d6e78af771
3. 0x506ce3d855e233c29d0b8cfcde21ee9a1241707b9f97eb5f822517258c1f18b9
4. 0x574c3e4f0ff3f37ad91fc52f03cf8225cdb6b5f77dd3db3c08480c499600d578
5. 0xd7d9a657379be58249f419069dd189d551b70a0fe98b91e85bc9f6b447b36da0
6. 0xe2cfc68acb0c185a6e1b493037a1e4c1ad316dc529e98869c5f2bf7afc7fe76c
7. 0x76ddd1b0e5dc768f7fdbb953a7cb40633296db536abbb86aef83a08fd4a19da9
8. 0x7f7a0bb11dd83f87e37baa62f78dd46192356ea77efda3e6f424b4bd037519d7
9. 0x9933a4e0f4c526d12547e0bdbba3a60ad3cef76c90f7584c5c11089298106b89
10. 0xe57d8a0a7aab46517d4b0c11713f3cf5fe9bdd01fe1f83525a5da8aa76fff625
11. 0x10ab1dcade0a7014f6e2ec1aad77e590548ce6153884709f2f529a5b7da201ca
12. 0x406147f849cb111c1169fc2176cae1293569ea7dde24372c055d7215e691132d
13. 0x86df60ca2c707e980ba7232f59c42d73f8912e9349469d6a710b1bc08c752414
14. 0xe41c2851c6fb24c6e15e2203479b95c7d0a99699161a99434f0b744f6d0541bb
15. 0x90983442ab42e700d20428d242c4145406c7d45f3761d2e64f4fe48376715c6a
16. 0x1ea547989ac488dff8da9e79b0ab4cffe98cb60fb4c76ae15e4a1f53a247e0be
17. 0x7efb735f8d49bcac59a20b148718d382f32a05352c0255ebbd501ca73055453d
18. 0x9c1c771179da4a002386557e8601b2d4983c3e366808477ee20da18c282c1dd8
19. 0xbb1998892a86d9633ea7b5de06760114b45777da649c217062ff0d65d7095f34

Day root

0xd4eed8c0ea3c90ec6f262b19fcc3b849f30cb82a0f84b8b89569e48af7d0c1ee

Chained

0x59305749c32724a02a23c368834d8a36ae9908da93a915e2962fffe01b4e591b

Published

On Arc Testnet, block 70772483: 0x813d56041c1efd407e56047129b597b154a1cb26458bb2768fd0a4630ac97345