Evidence row 741642

What was observed

{
  "count": 5,
  "tools": [
    {
      "description": "Read-only ERC-8004 identity lookup (owner, agentWallet, registration file, endpoint-domain verification) on Ethereum, Base, Optimism, Arbitrum, Polygon, BNB, Avalanche, Gnosis, Celo, Linea or Scroll.",
      "inputSchema": {
        "properties": {
          "agent_id": {
            "type": "string"
          },
          "chain_id": {
            "type": "integer"
          }
        },
        "required": [
          "chain_id",
          "agent_id"
        ],
        "type": "object"
      },
      "name": "lookup_erc8004_agent"
    },
    {
      "description": "Unpaid preflight of an x402 URL: fetch its 402, summarise accepts[]/extensions, verify any signed offers and report who can vouch for the signer. Never pays. Free.",
      "inputSchema": {
        "properties": {
          "method": {
            "enum": [
              "GET",
              "POST"
            ],
            "type": "string"
          },
          "url": {
            "type": "string"
          }
        },
        "required": [
          "url"
        ],
        "type": "object"
      },
      "name": "preflight_x402_endpoint"
    },
    {
      "description": "Verify an x402 signed offer (EIP-712 or JWS): signature, expiry, match to accepts[], and signer-authorization evidence (payTo, did:web, DNS _controllers, ERC-8004). Free.",
      "inputSchema": {
        "properties": {
          "accepts": {
            "description": "Optional accepts[] from the live 402 to match against",
            "items": {
              "type": "object"
            },
            "type": "array"
          },
          "offer": {
            "description": "The offer object: {format, payload?, signature, acceptIndex?}",
            "type": "object"
          },
          "resource_url": {
            "type": "string"
          },
          "trusted_pay_to": {
            "items": {
              "type": "string"
            },
            "type": "array"
          }
        },
        "required": [
          "offer"
        ],
        "type": "object"
      },
      "name": "verify_offer"
    },
    {
      "description": "Verify every signed offer inside a PaymentRequired object (pass the decoded JSON, or the raw base64 PAYMENT-REQUIRED header). Free.",
      "inputSchema": {
        "properties": {
          "payment_required": {
            "description": "Object or base64/JSON string"
          },
          "resource_url": {
            "type": "string"
          }
        },
        "required": [
          "payment_required"
        ],
        "type": "object"
      },
      "name": "verify_payment_required"
    },
    {
      "description": "Verify an x402 signed receipt (EIP-712 or JWS) returned in the settlement response: signature, freshness, payer/resource/transaction match, signer-authorization evidence. Free.",
      "inputSchema": {
        "properties": {
          "max_age_seconds": {
            "type": "number"
          },
          "network": {
            "type": "string"
          },
          "payer": {
            "type": "string"
          },
          "receipt": {
            "type": "object"
          },
          "resource_url": {
            "type": "string"
          },
          "transaction": {
            "type": "string"
          },
          "trusted_pay_to": {
            "items": {
              "type": "string"
            },
            "type": "array"
          }
        },
        "required": [
          "receipt"
        ],
        "type": "object"
      },
      "name": "verify_receipt"
    }
  ]
}

What the leaf hashes

{"body":"4bae6f58f25f14d55c8c13fd2b2fc41f7fe18d2a2dd0c9fbba4db23d585e18b2","id":741642,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793170835986146,"prev":null,"subject":"c91b999b-4a77-40f3-83e1-f289b9d5c8ed","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. 0x77bfe7f11761f55176665760470482f8c0cac341729de3cabee6994d73cac488
2. 0xc0f0c0f8fbd7377cedea7aec07048c0799aabdd693b813b29ba5ed654ea62c50
3. 0x41937715d2de46d1efe5dc559b5893d36940c399412191325ab2af46e704050a
4. 0x63743dba7f6ca080160e776eb5bc03287270ced760c08fb4e79ca4ea51aa79fd
5. 0x79d73768432dfd6370f6a7f3aad3de282a5da593b418f1a7e1f1d947ab91015b
6. 0xf3109f7be35407d5cd65e27883fb5ae20a8b99c4b5d2efd97f1a197253a81251
7. 0x0b4a6d92ee43eb64c9e229174b65d4e9123c834ca09daf18a1f95c9d877c4331
8. 0x6fb8c69d50cc03d65e008345b04bd3408bac51efad4f00a485c0181b89e7b6af
9. 0xded684cf19606af94e7d13b24f66701f305809a60096b6aa22ef14b1e565359d
10. 0x4a835c055c42bda08f3e843f64a6ee0f323608cb47b06acb49cb810b6d804cc0
11. 0xe209b6b6dacfeadbcbdb5f7131c54e98ddedd7daf948ebca4c8d8abd89cd9fc9
12. 0xdb715aef70540cf2462c6d23ed65a7b4f80c4d46060d218b3f284831fef0fc9e
13. 0x95d7bc27dc9ea43e607251bd7e1cdfa9e00b59b71051b5db78fe06bf25becc5b
14. 0x40581185279a8bf075dca3a4c3a5648ec6f62098ba7402cbc097d5cc707e0840
15. 0xab4e84d781dccd579dcf5c47a356a4a2e6cac58a2aefdf3543a3fa15238fa4db
16. 0x74cf00e07b52415c2184cf20be69d195ed2725497a6892c2f3e449497c17d0ec
17. 0x7a743a0a09057bae687051274e1d45bf973bd36a1a4ba16a191b5d29e3bdfa2a
18. 0xe027395fafb7fc41921c42ca0542524ea22204cbd5908b70b27f3d5fb26f5d0f

Day root

0x2c19037464cc4c493624565f01775d6446fc78eaa118fc6865bfe2bfca9ff78e

Chained

0xd1d7dee8322ceff8f4c8d83aa1fe4a4466825c2af1c97dbde3d35db61234f7be

Published

On Arc Testnet, block 69584042: 0x8bae2b1d097834c8b458513862d70d29ee807e98dc2e863b27250131c15b35ae