Evidence row 222602

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": "Monitor a wallet for balance changes and new USDC/ERC-20 activity. Recurring paid primitive; repeat about every 60 seconds while monitoring is active. Costs $0.005 USDC on Base via x402.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "activity_contract": {
            "pattern": "^0x[a-fA-F0-9]{40}$",
            "type": "string"
          },
          "address": {
            "pattern": "^0x[a-fA-F0-9]{40}$",
            "type": "string"
          },
          "cursor": {
            "minimum": 0,
            "type": "integer"
          },
          "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": "monitor_wallet"
    },
    {
      "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":"37687c02c084d14f9ec1651d8997c28ac18f45adcd2400edefcc7a95e02b443d","id":222602,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793028160444010,"prev":null,"subject":"508003af-ca8d-4bda-9fa5-aa773b736654","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. 0xad54aaa1a3a09eb50fef6a8ce70ec10b428375d5b3b7aba3fffcfbe21fd629bf
2. 0xabeb56afbfe2866ad4511dfb9532afff3a3d974c556facb561586c1bbcc87910
3. 0xa4278cfb398bacdf3f593b9bfae19ca398404f06ec986d1281a32bda9be4755d
4. 0x2463f95fc032f1ae4589001504c47b02db14fd9311d39e9aac2bf834d687e7ea
5. 0x432f26c4e2ddd2ff8b7a49f9465967b410e8f14acc920427d47189b6fd8853bc
6. 0xa4410ce8f97df6942c189a5846a31047fbd300386bd3639da77c1c724ba50d87
7. 0x8bc0c58892d6b27e8d9d9cd1d115faeae235e0d0d95bcdc8ac22469236b6ff95
8. 0xdd2b02d6f0ea8b0a0c019acf51ec4389f8e1f4461c371d8ccf1171266d3a25e3
9. 0xbbbcdb2a68b371a0b7b0af22f935a0deedf517e33fcff3c1e319aa53090c36c0
10. 0x69f5e36901c930d3d90499bc3b7d9e7644e48cf4f26d1ebf8d605ee5e9424913
11. 0x317c51a47b234292d19f812377ad1cc4d05ded07987c4ea1ac9ae1ad2b20f0d2
12. 0x51f06c175a7c946ebe50ef243d6f9370a8fe85c996e53eff19ffcc4585ea8c18
13. 0xe292b5a99219f136bce6647ce74b21240a1c7331d2475b1839220fd363c94217
14. 0x3b4dba7d874fc323b0a364140a9c60f37bf547fe671897653118a9873fe03420
15. 0x1a74ed3b3756b9cd946da49701bcec120ec88645013da99fa9eea60b39e1a570
16. 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae