Evidence row 263830

What was observed

{
  "count": 4,
  "tools": [
    {
      "description": "List the tools of this server with prices, data sources, licensing, daily limits and data freshness.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {},
        "type": "object"
      },
      "name": "catalog"
    },
    {
      "description": "Archived JMA prefectural weather forecast as issued. Give an area and at (forecast in effect then) or issued_at (exact JMA issue time). Returns JMA's bulletin as published (Japanese weather text, wind, waves, 6-hour rain probability, temperatures) with report_datetime (JMA's issue time) apart from fetched_at (ours). Status found, not_archived (before this archive started), unknown or no_issuance_at_that_time. Not the current forecast: check JMA.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "area": {
            "description": "JMA forecast office code (130000), sub-area code (130010), prefecture (Tokyo, 東京都, 13) or JMA area name (Kushiro Nemuro). Prefectures with several offices (Hokkaido, Kagoshima, Okinawa) need the office or sub-area",
            "maxLength": 40,
            "type": "string"
          },
          "at": {
            "description": "ISO 8601 date-time with time zone: return the issuance in effect at this time, e.g. 2026-10-12T09:00:00+09:00",
            "maxLength": 40,
            "type": "string"
          },
          "issued_at": {
            "description": "ISO 8601 date-time with time zone: return the issuance with exactly this JMA issue time, e.g. 2026-10-12T05:00:00+09:00",
            "maxLength": 40,
            "type": "string"
          }
        },
        "required": [
          "area"
        ],
        "type": "object"
      },
      "name": "forecast_as_issued"
    },
    {
      "description": "Which prefectural weather forecasts did JMA issue for an area between two times? Lists each archived issuance (JMA issue time, transmission time, our fetch time, scheduled/unscheduled/correction/cancellation, bulletin URL and SHA-256) with coverage gaps where JMA's feed could not be read. Free window: last 30 days (an earlier since is clamped; see history_window). Use forecast_as_issued for the content. An archive, not a forecast service.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "properties": {
          "area": {
            "description": "JMA forecast office code (130000), sub-area code (130010), prefecture (Tokyo, 東京都, 13) or JMA area name (Kushiro Nemuro). Prefectures with several offices (Hokkaido, Kagoshima, Okinawa) need the office or sub-area",
            "maxLength": 40,
            "type": "string"
          },
          "limit": {
            "description": "Maximum number of issuances, 1-500 (default 100)",
            "maximum": 500,
            "minimum": 1,
            "type": "integer"
          },
          "since": {
            "description": "Issuances after this: ISO 8601 date (00:00 Japan time) or date-time with time zone, e.g. 2026-10-12 or 2026-10-12T05:00:00+09:00",
            "maxLength": 40,
            "type": "string"
          },
          "until": {
            "description": "Optional end: ISO 8601 date (00:00 Japan time) or date-time with time zone (default now)",
            "maxLength": 40,
            "type": "string"
          }
        },
        "required": [
          "area",
          "since"
        ],
        "type": "object"
      },
      "name": "forecast_issuances"
    },
    {
      "description": "Re-fetch the stored result of a settled paid call by its receipt_id, for when the response was lost after payment. Free. Unknown or unsettled receipt ids return RECEIPT_NOT_FOUND. Results are kept for 90 days after settlement.",
      "inputSchema": {
        "$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"
    }
  ]
}

What the leaf hashes

{"body":"b23d9b74f2e4122f2dc51a150d7f602961dacec13c9bdf75c00531df25c888e3","id":263830,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793033761607037,"prev":null,"subject":"0db8f6ac-7409-4939-925d-e400bf5ad7d9","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. 0x7a2870bffa214054a3a37a7464b9e53317c95cc37efb237fb704b72b0a28a2d6
2. 0x79e15c0e0c0aa455da6b9b6a2217fc79e9675ccb9945c89456699a5bbbd0c5fc
3. 0x35fcf6ba84cc275b8a9487283f2b299a7212a2b7c4ed43f6ccf19828d993e275
4. 0x859be6b1eda7b2d165fe95f0c31bb016676c308cfd507fdce6c86a91c95369c0
5. 0xd02f6821269fa7000e15eaaa38b5a1b1aaa913cb638d33828d2feeba99c65b05
6. 0xe88aeb334e7ee78e12eead29b05116c9f3a47ed846b4a40c72e89d36af227fed
7. 0x9d6ba5cb0f1249fd9a34a5c39f68b59352f848c99bb79db7c4ebf10828cf4cd3
8. 0xd3507d06d4cad3e959c2909043d3086baacb812273d7f78412405f08b4ad6ea0
9. 0x4a5f24de43215ab4d4d63b885e82341f9af2f4b6cdcaaa7b5e53c2a252e14c23
10. 0xd7bfe89d1c95d31c83b5cd958ac57e187ca41d9a64c12c75ed199d276c80aa6f
11. 0x1474b20023ac420a3be8200f14f9ac14f1ee93ff05411fa3760c28b2e50fb3dd
12. 0xa6406b1a5540d26e0cbd03bb274a01c10968fadb17913a6043bb9427ddfb71ba
13. 0x01c95624b1f2385ef774ee258a9ae58a4df07a1bdaa829de84e1d5201f3f39c2
14. 0x7721d38652b6444b18e1193824e50490ade04851ce6221771f6e374c4527d80f
15. 0x15039087bf60ae9b06b756ec3cbc299760e59923a438bbd91e34d105186db0ed
16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae