Evidence row 3008681

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":3008681,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793796836960684,"prev":null,"subject":"3a2e40a6-79cd-45a1-9027-005627af47af","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. 0x6619e2ac35d4047c97ddfc7c5b96a7dcf66f98e65bc24fdb29febd98173f6e13
2. 0x24d8f793f22f77930ed8bc0f5e8d4fc3291d0ad620b921459d2ed467bdfb6f57
3. 0xb03be128d9c38414aadf9eeb6b5dfb3eddeca79ff7fa58b9d7f86ed1971ac1ad
4. 0xe602c9e65d425f0952680c8d21878baf18c2b08d47a83faaefcf0d5d2771e954
5. 0x50ab3f55eb57513b8c9c564020efb11daf6c36c3f0cd29c6b17e70a33515b64c
6. 0xc986143693772e6e925a51b00117171317457514980d707175effbd0c059a248
7. 0x49caef8b47fb3c6e6031f9ab7db7dac5b5e1a330d402d91a20b9827fd1f796f6
8. 0xf3dc48cab43500262a979b6a4cc943aa90aa0f6c25d79d3e9959561c2ae0dd0d
9. 0x199a8b62c6849bc993c7adbe75cd30d832fe36fb6dc0573e8b8e2f7bd6220955
10. 0x7fc8feab0556ae48a71476d9539c71b8de6b98aed4a3cb16aedd61fb3401accc
11. 0x01c2fee62cb12767ded08985da1f8c12d476d24db8e054e3554ad67b7e551d72
12. 0x2ca836965d0a80a8cb16e710f10aafd73eddd6a00a71343d90b699225a3d44eb
13. 0x59f7eb9892d5ca9b92fddacf62c342986dd7d5d77cf105dcc6c2db2d5a0d13ce
14. 0x3b1726687d77b93fde24818aacc15ce8acc187a405b1ecd23d591d9b554de8a3
15. 0x0e10919b7a16f90360e54e6f46f983247d877881e666fe311966b12118be1c10
16. 0x222747d565045b8857fa26ae816cd563ae6334c25795b19227a65c6abf341de3
17. 0xd8e00ce5342a08a947d0a4806e7254d076614766392d88153d93cf58ae69cf8b
18. 0xc3c363818e1d5142c4629be55f1c9e168a7466e628cfd2a858fe171aff1e91ca
19. 0x10067354f57fa0cd86b7423e67cc1c7d107d7c9c6823df5246c4fb63b60575e5

Day root

0xd4eed8c0ea3c90ec6f262b19fcc3b849f30cb82a0f84b8b89569e48af7d0c1ee

Chained

0x59305749c32724a02a23c368834d8a36ae9908da93a915e2962fffe01b4e591b

Published

On Arc Testnet, block 70772483: 0x813d56041c1efd407e56047129b597b154a1cb26458bb2768fd0a4630ac97345