Evidence row 734361

What was observed

{
  "count": 6,
  "tools": [
    {
      "description": "Preflight any address on Base or Arc before paying or approving it: EOA vs contract vs EIP-7702-delegated wallet, EIP-1967 proxy implementation/admin, owner(), Safe multisig threshold, ERC-20 metadata, USDC + native balance, Sourcify verification, and risk flags. Costs $0.005 USDC on Base per call via x402 (unpaid calls return the x402 PaymentRequired; any x402 MCP client pays automatically).",
      "inputSchema": {
        "properties": {
          "address": {
            "pattern": "^0x[0-9a-fA-F]{40}$",
            "type": "string"
          },
          "chain": {
            "default": "base",
            "enum": [
              "base",
              "arc"
            ],
            "type": "string"
          }
        },
        "required": [
          "address"
        ],
        "type": "object"
      },
      "name": "address_profile"
    },
    {
      "description": "Free. Lists every ChainKit tool with its price, required inputs and an example, plus how x402 payment works. Call this first.",
      "inputSchema": {
        "properties": {},
        "type": "object"
      },
      "name": "chainkit_catalog"
    },
    {
      "description": "Explain a Base or Arc transaction in plain JSON: status, confirmations, fee, method selector, created contract, and every ERC-20 transfer decoded with symbol and decimals. Costs $0.004 USDC on Base per call via x402 (unpaid calls return the x402 PaymentRequired; any x402 MCP client pays automatically).",
      "inputSchema": {
        "properties": {
          "chain": {
            "default": "base",
            "enum": [
              "base",
              "arc"
            ],
            "type": "string"
          },
          "tx": {
            "pattern": "^0x[0-9a-fA-F]{64}$",
            "type": "string"
          }
        },
        "required": [
          "tx"
        ],
        "type": "object"
      },
      "name": "explain_transaction"
    },
    {
      "description": "Live block height, gas price and fee estimates (transfer, ERC-20 transfer, contract call) for Base or Arc. On Arc fees are quoted directly in USDC. Costs $0.001 USDC on Base per call via x402 (unpaid calls return the x402 PaymentRequired; any x402 MCP client pays automatically).",
      "inputSchema": {
        "properties": {
          "chain": {
            "default": "base",
            "enum": [
              "base",
              "arc"
            ],
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "network_status"
    },
    {
      "description": "USDC and native balance of one address on both Base and Arc in a single call. Costs $0.002 USDC on Base per call via x402 (unpaid calls return the x402 PaymentRequired; any x402 MCP client pays automatically).",
      "inputSchema": {
        "properties": {
          "address": {
            "pattern": "^0x[0-9a-fA-F]{40}$",
            "type": "string"
          }
        },
        "required": [
          "address"
        ],
        "type": "object"
      },
      "name": "usdc_balances"
    },
    {
      "description": "Verify that a transaction paid at least N USDC to an address on Base or Arc (handles Arc native-USDC logs). Returns verified true/false, confirmations, matching transfers and reasons. Use it to confirm a customer paid before delivering. Costs $0.003 USDC on Base per call via x402 (unpaid calls return the x402 PaymentRequired; any x402 MCP client pays automatically).",
      "inputSchema": {
        "properties": {
          "chain": {
            "default": "base",
            "enum": [
              "base",
              "arc"
            ],
            "type": "string"
          },
          "from": {
            "pattern": "^0x[0-9a-fA-F]{40}$",
            "type": "string"
          },
          "minAmount": {
            "type": "string"
          },
          "minConfirmations": {
            "type": "string"
          },
          "to": {
            "pattern": "^0x[0-9a-fA-F]{40}$",
            "type": "string"
          },
          "tx": {
            "pattern": "^0x[0-9a-fA-F]{64}$",
            "type": "string"
          }
        },
        "required": [
          "tx",
          "to"
        ],
        "type": "object"
      },
      "name": "verify_usdc_payment"
    }
  ]
}

What the leaf hashes

{"body":"6899203ba8b0d2a292e58e7b1efb93483a075bcbab38048d0340e209edc6e98b","id":734361,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793156196855050,"prev":null,"subject":"1e4c3aa5-10f7-4641-b2d3-854263210954","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-28 (231336 rows).

1. 0x252d0cc512c2fde2afc2a9c6892a11a41861fd20c9dd57b9563ec54e130e7079
2. 0x7bdaa2f029214bbaabfb9caf00454d6c3e4e628ca69b6657f2834c60fc9f9f67
3. 0x21932db07332e4c362c04736729dd7a824cb6ab9a08a0b84850bb56f02e5f194
4. 0x2496355c293bfa981a88f156c58a2072a55d8667bc7e45dfa992483911360da3
5. 0xb609e0da81c80df9052ea6dfb79711760f851745719f2435fdcee07f17e1a44a
6. 0x32a323298aed4951fe1ccfb1e44e5309c7b35a48d97f645571903880a9944301
7. 0x026a640cc2c9de9505e0b1f5aa439d33a78232ba120dd1e4a8ca03b5ee2473d9
8. 0xd7d2ed8cec5d3f777eae8b2dc5cda189788a76147fa4bb06ce2ff67d2e54f0f1
9. 0x5d4ea54b6afbcfd32332a6026f747974a2ed642a245447559fc9d81eb9855abc
10. 0xca14059331b2923690aeb9804ede0a23d3dfb814d5c6cc83080c3843ed486e6d
11. 0x7cec297ea316d17595d82ab85f2028a20db8bf758125cc62125b1a2c8d0d7512
12. 0x2a6cfa6bbf974cb7898427aa13bd3083f55935fb0e675d1af43c5a54e01791db
13. 0xfcc0286dc0eb69aad96b886d1f2a42a5bc1d90d84cfc212c4ef6bde6a564a1de
14. 0x5c170d609340e1f702f31fcdd7742289f0913d4395f688b3409031b758c69eae
15. 0x8d500b42a7bdba5e17ebd9e6a404f2de5260cf3420865b41e7de8c69434ce413
16. 0xaeb1503e5d0d358b256ba97a10178c357ddb8f55cc961925ccf0458aae5ebcae
17. 0xf078ea7d84d98dbeffed23d8e67b36751e60464ffd4cfdc005e0aa6f8cb9b459
18. 0xe027395fafb7fc41921c42ca0542524ea22204cbd5908b70b27f3d5fb26f5d0f

Day root

0x2c19037464cc4c493624565f01775d6446fc78eaa118fc6865bfe2bfca9ff78e

Chained

0xd1d7dee8322ceff8f4c8d83aa1fe4a4466825c2af1c97dbde3d35db61234f7be

Published

On Arc Testnet, block 69584042: 0x8bae2b1d097834c8b458513862d70d29ee807e98dc2e863b27250131c15b35ae