Evidence row 258141

What was observed

{
  "count": 6,
  "tools": [
    {
      "description": "Fetch a registered endpoint and compare against its last snapshot to detect schema changes. Or compare two inline JSON objects directly.",
      "inputSchema": {
        "properties": {
          "endpoint_id": {
            "description": "ID of a registered endpoint to fetch and compare",
            "type": "string"
          },
          "save": {
            "description": "Save snapshot and diff to history (default: true)",
            "type": "boolean"
          },
          "snapshot_a": {
            "description": "Inline \"before\" JSON (omit endpoint_id for direct comparison)",
            "type": "object"
          },
          "snapshot_b": {
            "description": "Inline \"after\" JSON (omit endpoint_id for direct comparison)",
            "type": "object"
          }
        },
        "type": "object"
      },
      "name": "compare_snapshots"
    },
    {
      "description": "Remove a monitored endpoint and all its snapshots and diff history.",
      "inputSchema": {
        "properties": {
          "endpoint_id": {
            "description": "Endpoint ID to delete",
            "type": "string"
          }
        },
        "required": [
          "endpoint_id"
        ],
        "type": "object"
      },
      "name": "delete_endpoint"
    },
    {
      "description": "Check if a registered endpoint has had any breaking changes (removed fields or type changes).",
      "inputSchema": {
        "properties": {
          "endpoint_id": {
            "description": "Endpoint ID",
            "type": "string"
          }
        },
        "required": [
          "endpoint_id"
        ],
        "type": "object"
      },
      "name": "detect_breaking_changes"
    },
    {
      "description": "Retrieve the schema diff history for a registered endpoint.",
      "inputSchema": {
        "properties": {
          "endpoint_id": {
            "description": "Endpoint ID",
            "type": "string"
          },
          "limit": {
            "description": "Max diffs to return (default: 20, max: 50)",
            "type": "number"
          }
        },
        "required": [
          "endpoint_id"
        ],
        "type": "object"
      },
      "name": "get_diff_history"
    },
    {
      "description": "List all registered API endpoints being monitored.",
      "inputSchema": {
        "properties": {},
        "type": "object"
      },
      "name": "list_monitored_endpoints"
    },
    {
      "description": "Register an API endpoint to monitor for schema changes. Provide name, url, and optionally method/headers/description.",
      "inputSchema": {
        "properties": {
          "body": {
            "description": "Request body (for POST/PUT)"
          },
          "description": {
            "description": "Optional description",
            "type": "string"
          },
          "headers": {
            "description": "Request headers",
            "type": "object"
          },
          "method": {
            "description": "HTTP method (default: GET)",
            "enum": [
              "GET",
              "POST",
              "PUT",
              "PATCH",
              "DELETE"
            ],
            "type": "string"
          },
          "name": {
            "description": "Identifier for this endpoint",
            "type": "string"
          },
          "url": {
            "description": "API URL to monitor",
            "type": "string"
          }
        },
        "required": [
          "name",
          "url"
        ],
        "type": "object"
      },
      "name": "register_endpoint"
    }
  ]
}

What the leaf hashes

{"body":"ba56a4f0a3585e07dc78f1680a75c7a22a444e88beda72db287bf2114365c8a6","id":258141,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793029960604123,"prev":null,"subject":"4991a15c-9449-4c24-86cf-17334f0bfa8c","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. 0x58f7cc9523e4fb67b3fde72072efadb79a97f797915441d488c0b0147f83aa4c
2. 0xa0844490edbf48130d26cb999123d39ae3b8a803b4866e22d7cc1f133387ae9a
3. 0xb500986f0bd09ae3750f5d9df1a5486e5baf25bbbe0c1f1096bc6586d205f5c7
4. 0x8c2832ccd094725885c8236e0e4098d18192fd5edd259a2a90d26de84f292781
5. 0x51d397a505917359ad6f27d2e001c0f69c044b282f524817dbb18ac18a1c4cd8
6. 0xce115352c637399878786c593eab7fa37fae5f7531b4ae9caa3f60e7fef6cf1e
7. 0x18da3935cc2bd8741a708df9d7a79ce31450501894d24af90ead450dd3f80840
8. 0xf57df5a1b24bf568f1e330d25b92c91ba216a90c7bcfbdc397f3813ecf4c2736
9. 0x1273e25b2ad255e95ccb3cf0023370296f648f0e3797a6d998d9286069032c53
10. 0x3c391d4052bf1c21440a7636450f4fb4083ee346a84eb347e8cb8ad8d7604771
11. 0x049f39c56b6b9cf95e0d9ebf2081f54ac35b4d69ec211e8498958f47d088b46c
12. 0xf522fa92d4115c2b18b96aa43119f8df9b4e96c92f5d6449d0fe96dcd4bf324c
13. 0xc8abb13c711b67d9f1ef145286ed450a0f5566f054a4b290ea3d711873bcbe20
14. 0x5cdeb4648502e0633d01cc4f3379d48cccb9d4f528565b2868eb93db0df9e829
15. 0x7726154b91b2ad65b13849ef6cb6443b1f0ff113a3089c9bd5f2bcfc16be099d
16. 0x47b89901b0f07938a6b9a66ddf35683903f79d756a7c7763665fd632758b08d0
17. 0x9a83be955a206deb65b995adfd92c58fa31c95fbbf926bd199d300e70b08b26d
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae