Evidence row 222639

What was observed

{
  "count": 4,
  "tools": [
    {
      "description": "Canonical current EVM base fee in gwei for Base or Ethereum, for recurring transaction timing and execution checks. Costs $0.001 USDC on Base via x402.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "chain": {
            "enum": [
              "eip155:8453",
              "eip155:1"
            ],
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "gas_price"
    },
    {
      "description": "Recurring treasury/accounting snapshot with balances, gas and recent token activity; repeat about every five minutes while active. Costs $0.01 USDC on Base via x402.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "activity_contract": {
            "description": "ERC-20 activity contract; defaults to USDC.",
            "pattern": "^0x[a-fA-F0-9]{40}$",
            "type": "string"
          },
          "activity_cursor": {
            "minimum": 0,
            "type": "integer"
          },
          "address": {
            "pattern": "^0x[a-fA-F0-9]{40}$",
            "type": "string"
          },
          "lookback_blocks": {
            "maximum": 5000,
            "minimum": 1,
            "type": "integer"
          },
          "network": {
            "enum": [
              "base",
              "ethereum"
            ],
            "type": "string"
          },
          "previous_state_hash": {
            "pattern": "^[a-fA-F0-9]{64}$",
            "type": "string"
          },
          "tokens": {
            "items": {
              "pattern": "^0x[a-fA-F0-9]{40}$",
              "type": "string"
            },
            "maxItems": 20,
            "type": "array"
          }
        },
        "required": [
          "address"
        ],
        "type": "object"
      },
      "name": "treasury_snapshot"
    },
    {
      "description": "Read recent wallet ERC-20/USDC activity with cursor state for recurring payment and deposit monitoring. Costs $0.002 USDC on Base via x402.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "address": {
            "type": "string"
          },
          "contract": {
            "description": "ERC-20 contract; defaults to USDC on the selected network.",
            "type": "string"
          },
          "cursor": {
            "minimum": 0,
            "type": "integer"
          },
          "lookback_blocks": {
            "maximum": 5000,
            "minimum": 1,
            "type": "integer"
          },
          "network": {
            "enum": [
              "base",
              "ethereum"
            ],
            "type": "string"
          }
        },
        "required": [
          "address"
        ],
        "type": "object"
      },
      "name": "wallet_activity"
    },
    {
      "description": "Canonical wallet balance for Base or Ethereum. Returns native ETH and USDC balances for one address and is suitable for recurring wallet and treasury polling. Costs $0.001 USDC on Base via x402.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "address": {
            "pattern": "^0x[a-fA-F0-9]{40}$",
            "type": "string"
          },
          "chain": {
            "enum": [
              "eip155:8453",
              "eip155:1"
            ],
            "type": "string"
          }
        },
        "required": [
          "address"
        ],
        "type": "object"
      },
      "name": "wallet_balance"
    }
  ]
}

What the leaf hashes

{"body":"55cc3f63b7cb8cddc3d555687bda874d024f0d635dd80d9eb4ba410e509831aa","id":222639,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793028175762714,"prev":null,"subject":"8acf964c-a266-4944-aaa0-bc6d494550f8","subject_kind":"endpoint"}

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. 0x7da4a089eaeb69ec74f163af0ded8bac003c6e92e92d8783e8921438c403e94a
2. 0xf704811b07f762d3bd2a79661bd6a6b6cde86f5cb0fbb04e416809ccf23a91f3
3. 0x4535ddb81aff9c34b7ed9c11f0933ad5e337d2ebd0fea40e752fa2f32a362120
4. 0x1959f35fea95ed2cd4be5586fce50105cad8858ca309eb941c6f7d383bad943a
5. 0x36b12b4ea87a5856e347ca13443cda1ddc781f1bb08541b3883b507ad8ede04d
6. 0xd80a78f4cc34f65076eba5a2550ce64b03b121e7d08b3bb90d29c9f032d821aa
7. 0x168d3fc202227b8edc6ae4cdf8b63787df816377b0e12174fe2b1163f8c0ef21
8. 0xcad543f037410e18b620be4568677dd3d1ec330aec49676b3ded9be57171d5a7
9. 0xf0c521c76e6895a1d4c2d0bc9b57bf3c58f99d0a19c1129adb4684fbf86456ae
10. 0x9fa5dbe99ca21068042ed16a3612abec879ae9bc437beeaf788519de22645918
11. 0xaf10e841089e5989890dc77ffce42a46564d25ef15f30d1e35bf53a495483ad4
12. 0xab729e4203b650f2a3c15efd6fd44eb2482232373bc1de662fd9d496869eb2d3
13. 0x0bffb634300aa5609bddaa79e8d31d7cde36c0a5a4465472f809b9f5287e40d2
14. 0x7721d38652b6444b18e1193824e50490ade04851ce6221771f6e374c4527d80f
15. 0x15039087bf60ae9b06b756ec3cbc299760e59923a438bbd91e34d105186db0ed
16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae