Evidence row 263915

What was observed

{
  "count": 4,
  "tools": [
    {
      "description": "List the tools of this server with prices, data sources, licensing, daily limits and data freshness.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {},
        "type": "object"
      },
      "name": "catalog"
    },
    {
      "description": "Re-fetch the stored result of a settled paid call by its receipt_id, for when the response was lost after payment. Free. Unknown or unsettled receipt ids return RECEIPT_NOT_FOUND. Results are kept for 90 days after settlement.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "receipt_id": {
            "description": "The receipt_id returned with a paid result (\"rcpt_\" + 64 hex characters).",
            "maxLength": 80,
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "receipt_id"
        ],
        "type": "object"
      },
      "name": "get_receipt"
    },
    {
      "description": "Free. The limited reference list this server compares token addresses with: known assets (network, contract, symbol, decimals) with sources and check dates, known CAIP-2 networks, scheme names from the x402 specs, and payment flows. A table match is not proof that an asset or a merchant is genuine.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {},
        "type": "object"
      },
      "name": "x402_known_assets"
    },
    {
      "description": "Free. Decode one x402 v2 payment request (base64 PAYMENT-REQUIRED header, PaymentRequired JSON or MCP tool result) and list every accepts option with exact atomic and decimal amounts. Token addresses are compared with a limited reference list. status: parsed, ambiguous (options differ in recipient, network or amount; none is chosen), malformed or unsupported. Does not verify the merchant, authorize a transfer, assess fraud risk, or guarantee any payment. URLs in the input are never fetched.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "raw": {
            "anyOf": [
              {
                "maxLength": 90000,
                "minLength": 1,
                "type": "string"
              },
              {
                "additionalProperties": {},
                "propertyNames": {
                  "type": "string"
                },
                "type": "object"
              }
            ],
            "description": "The payment request. A string: the base64 PAYMENT-REQUIRED header value (a leading 'PAYMENT-REQUIRED:' is allowed) or JSON text. An object: the PaymentRequired JSON, or for transport mcp the tool result (structuredContent, _meta x402/error or content[0].text)."
          },
          "transport": {
            "default": "http",
            "description": "Where the request came from: http (402 response) or mcp (paid tool result). Default http.",
            "enum": [
              "http",
              "mcp"
            ],
            "type": "string"
          }
        },
        "required": [
          "raw"
        ],
        "type": "object"
      },
      "name": "x402_parse_payment_request"
    }
  ]
}

What the leaf hashes

{"body":"cf32109967d1157af8156b90f69d6610eb01a0108bb3a751b43a4f116c9541eb","id":263915,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793033834432436,"prev":null,"subject":"058b9c48-e3f4-4009-803b-27c307d7378b","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. 0xd11daf76ba77bd42f1edeaad1c12a7b1f940715d482c0dfff125187cf517993a
2. 0xd031fbbc48483a0db37081bea0fdba81135928ea7c6b631027fa8d5ad59504a1
3. 0x654f4c092c025c1e9ee1199c0af17ce83189d19507af96b9401c9c2a49b2bda5
4. 0x868ba7496e2c0adb5135832f2836c790918dbc3cc76dd1e92b9364d8e1471693
5. 0xe2490b6fc70e23b90455ba88032d37f6c322e3a3ed17eef18b188e731b8eb45e
6. 0xb982042eddfa8f788f3c30362dcfa11d59c45a51ae01089a75983b1d5357ae53
7. 0xdeb50140eb683c28857b88b5a592898c17448c8d6992b647011af0010b7a6288
8. 0x89656905a6e3f3d1603f15a9e9f3e2c7c68f5a48c4004dcb538034c65f9c6539
9. 0x666fc9b26121779efeffcfa03cdf6524c841116130d8cbd786aab93904cca6fb
10. 0xdefcd4fc2ebdfaa82bec33833639fbb6712ab7a9bb3beafebc53c8b103648d9a
11. 0xcbb746ffeda31ff1f1b0d9f74705fed23a3c2abac5d325d65e8e867a7b5e6307
12. 0xa4ec009cd8db00b48fa2e4df84088950b4d34c37254de09f5e3789441c0c5e73
13. 0x889eefefef2d4457fe6114f397df813a5cbb85011a6f40309b54ddcd4aba3bd1
14. 0xefabf1105e09cf52c12c58e60cbb5048b9ac3f02631d1816a926e14bdd86fbdf
15. 0xe94ca5b798e9899ad611e57835af42266e20f53f44977e487d81365e30972beb
16. 0x703f95866af09c5e5d6ead7411e9a10f964a41a2aff64d4a55ff0053c023a023
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae