Evidence row 574556

What was observed

{
  "count": 3,
  "tools": [
    {
      "description": "Get active weather alerts for a US state. Give the two-letter state code (for example CA or NY) and get every active National Weather Service alert for it: the event type, the area it covers, its severity, what is happening, and the official instruction. US locations only. No API key and no account: discovery is free, a call costs $0.01 in USDC on Base via x402, and nothing is charged when the request returns no data. Free tools: health and tools/list.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "state": {
            "description": "Two-letter US state code (e.g. CA, NY)",
            "maxLength": 2,
            "minLength": 2,
            "type": "string"
          }
        },
        "required": [
          "state"
        ],
        "type": "object"
      },
      "name": "get-alerts"
    },
    {
      "description": "Get the weather forecast for a point on the map. Give latitude and longitude and get the next five forecast periods for it: the period name, its temperature, wind speed and direction, and the plain-language forecast. US locations only. No API key and no account: discovery is free, a call costs $0.01 in USDC on Base via x402, and nothing is charged when the request returns no data. Free tools: health and tools/list.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "latitude": {
            "description": "Latitude of the location",
            "maximum": 90,
            "minimum": -90,
            "type": "number"
          },
          "longitude": {
            "description": "Longitude of the location",
            "maximum": 180,
            "minimum": -180,
            "type": "number"
          }
        },
        "required": [
          "latitude",
          "longitude"
        ],
        "type": "object"
      },
      "name": "get-forecast"
    },
    {
      "description": "Check that the service is up. Costs nothing.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {},
        "type": "object"
      },
      "name": "health"
    }
  ]
}

What the leaf hashes

{"body":"89d4d3ac469f3854523507a71db80ce36d88bb720eca36cb9e3efb519a821939","id":574556,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793141579169712,"prev":null,"subject":"4cac874a-4a03-4654-a2c7-da4736a8c244","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-27 (273461 rows).

1. 0x6a4783dd4cc2542d4dcc90fa0f7312b51519ef8e2f237d1f8920bae646079f35
2. 0x0e5b6d22fdc51da176e25e58f6748b7aafec0289d1d21826553e7c25ef2446fd
3. 0x9d56777022ecf8ffa7aa67629d82faa7ebda8a1b4c9f4ad845f24c6c67a4a56c
4. 0x01a8a340f267b919433d3df66e09a9b10af097d232ebeeb8ccf044ef1e178741
5. 0xc7e960397d15f347abb222a4e0c4252eb0fd680e51cb56e78191f88a36bde191
6. 0xeafc04223a7aad45eb1b734917358a607506d67514dc7514bfd153fd1ef4eb2d
7. 0xbccf9b1e64aac940f37296f7773fde5a879e740a9d8c50ff75af259c2c98244c
8. 0xe60c044dd75387455f6977aa21858b7f8bf869caa2ef359d4ebcdc3739c71c20
9. 0x8beab0f3ea053c358a50ece7113efbbb08f07884882eef7bce579b8fd3d1956e
10. 0x8292b0c4302eab317dc9442deb7c510d6a5800a9f644e4859ca59b9b2b323e8a
11. 0xf948df558d360ef6260367a5acb11bce86c964cb5608d9fbd474976a57db8d7b
12. 0x1907258a29a881c6f59707e890e9f73f7aff1ace32101f20e208f76e9fac9a60
13. 0x927616fada4e04588c09f6e02e8f6e3a1351bac8355e394da3bd0bf249a5c503
14. 0x3c5462812bd2f841e3d7deefc01555f18262fe5e0d5a7eb155330b7a7cb0388e
15. 0x6f00f0da417f4126951ba8ba9b7962c847e91f5c61364ad9ad47e5f979698a60
16. 0x23cf9bb4337ee8be7fcae368fd69d24c62c11fb45882127b4cd919bb96a19996
17. 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4