Evidence row 263940

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": "Which registered support organizations were added to, changed in, dropped from or returned to Japan's official ISA list since a date? From this service's own record of list versions (ISA publishes only the current list). Each change has the registration number, observed_at, last_seen_at, changed fields and before/after details; the reason for a drop is not published or inferred. History starts at tracking_since. Free window: last 30 days (see history_window).",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "change_type": {
            "description": "Optional filter: added, modified, dropped_from_list or reappeared",
            "enum": [
              "added",
              "modified",
              "dropped_from_list",
              "reappeared"
            ],
            "type": "string"
          },
          "limit": {
            "description": "Maximum number of changes, 1-500 (default 100)",
            "maximum": 500,
            "minimum": 1,
            "type": "integer"
          },
          "prefecture": {
            "description": "Optional filter: prefecture name, JIS code (13) or local government code (130001)",
            "maxLength": 20,
            "type": "string"
          },
          "since": {
            "description": "ISO 8601 date or date-time with time zone, e.g. 2026-10-01 or 2026-10-01T00:00:00Z",
            "maxLength": 40,
            "type": "string"
          }
        },
        "required": [
          "since"
        ],
        "type": "object"
      },
      "name": "support_org_changes"
    },
    {
      "description": "Is this Specified Skilled Worker registered support organization in Japan's official ISA list? Look up by registration number (e.g. 19-000002), part of an organization name (2+ chars), prefecture or language. Returns found, not_in_current_list (seen before; reason not published or inferred), no_match_in_checked_list or unknown, with registration date, names as published, municipality, offices, languages, first_seen_at and last_seen_at. Confirm on the ISA page first. No representative names.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "language": {
            "description": "Support language: code (vi), English name (Vietnamese) or Japanese name (ベトナム語)",
            "maxLength": 40,
            "type": "string"
          },
          "limit": {
            "description": "Maximum number of organizations, 1-100 (default 20)",
            "maximum": 100,
            "minimum": 1,
            "type": "integer"
          },
          "name": {
            "description": "Part of the organization name in Japanese or English, at least 2 characters (organization names only)",
            "maxLength": 100,
            "type": "string"
          },
          "prefecture": {
            "description": "Prefecture name (Tokyo or 東京都), JIS code (13) or local government code (130001); matches the registered address or any support office",
            "maxLength": 20,
            "type": "string"
          },
          "registration_number": {
            "description": "ISA registration number, e.g. 19登-000002 (also 19-000002 or 19-2). When given, the other filters are not used",
            "maxLength": 30,
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "support_org_lookup"
    }
  ]
}

What the leaf hashes

{"body":"937e00fb74405c79b7e66310db1db57741630236d354fc07227e96c42582b9c0","id":263940,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793033848977151,"prev":null,"subject":"08dfa31b-9f8a-4881-a2f3-ff9dc1286f4e","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. 0x664ee0738158256f806f06c0d1c079335a66363f855822a059ddf7ad5abc6523
2. 0xdde33e1922218b7b9efcf7c0a9f5ab20f8f8b7d017b77f0cc990ec215c646413
3. 0xe6b232f06d1f79358059c46a2170b17a6cf6b3502859ae72a8f370476ffbc83f
4. 0x159c97ad8eabd967b99fe64815cbff7300a266993b591bb3ecb252bde2fe4f4b
5. 0xd92a4230ae74f7eecdafc2692973d0231fbc47dbab7ce673732b51e8fc1c1eb4
6. 0x0a9023ab23285d4a4a57a26c94cde425ffee9c5880dc56804f8afb80444e2bab
7. 0xc63f16665939778c7ae365b73b20778294af5e34cc6fcb859576bb767b38ebe8
8. 0x2c9651ee5049ff17c17dd2a9b45db3f30031282e6c3d3d26743ea5c98d82dc20
9. 0xa22cefd99c32eb3b42c630c0f6ce80c275c3886adef0fb6358d3cdbc91fa0fc2
10. 0x58c0a36fd4c0b127730a3ff2bd4a0e6279da1a965147e7629a7fd4098c5fed18
11. 0x97befbe0402dae50d99027054f0d354513b22fda782f887ba0d9fae94219c296
12. 0x611b1c1b68d04a71934006e383071a8f3836400d60beb86d81dd038bc102029f
13. 0x13f4b94ecf613d585c952b5363dad2b247a55371eb8e358bb89dc033e83128b1
14. 0x9a79c65e077cd9da9d436b3ade6f5ddc0d244510c4d5903ef2f02d81205f7666
15. 0xa2d436d488e3600b0e5c3e3ed9c9234cd52853c59830b786334fd0c4292d9f40
16. 0x47b89901b0f07938a6b9a66ddf35683903f79d756a7c7763665fd632758b08d0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae