Evidence row 222659

What was observed

{
  "count": 3,
  "tools": [
    {
      "description": "Detect whether a webpage changed. Compare current content against a previous hash or previous text and return deterministic hashes and diffs. Costs $0.001 USDC on Base via x402.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "ignore_selectors": {
            "items": {
              "type": "string"
            },
            "type": "array"
          },
          "include_current_text": {
            "type": "boolean"
          },
          "max_diff_chars": {
            "maximum": 50000,
            "minimum": 1000,
            "type": "integer"
          },
          "max_text_chars": {
            "maximum": 250000,
            "minimum": 1000,
            "type": "integer"
          },
          "previous_hash": {
            "type": "string"
          },
          "previous_text": {
            "type": "string"
          },
          "selector": {
            "type": "string"
          },
          "timeout_seconds": {
            "maximum": 60,
            "minimum": 5,
            "type": "integer"
          },
          "url": {
            "format": "uri",
            "type": "string"
          }
        },
        "required": [
          "url"
        ],
        "type": "object"
      },
      "name": "detectWebpageChange"
    },
    {
      "description": "Extract webpage metadata, OpenGraph and JSON-LD. Returns title, description, canonical URL, robots directives, headings, Open Graph, Twitter cards and structured data for one public URL per paid request. Costs $0.001 USDC on Base via x402.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "concurrency": {
            "maximum": 20,
            "minimum": 1,
            "type": "integer"
          },
          "timeout_seconds": {
            "maximum": 60,
            "minimum": 5,
            "type": "integer"
          },
          "urls": {
            "description": "Exactly one public URL per paid request.",
            "items": {
              "format": "uri",
              "type": "string"
            },
            "maxItems": 1,
            "minItems": 1,
            "type": "array"
          }
        },
        "required": [
          "urls"
        ],
        "type": "object"
      },
      "name": "extractWebpageMetadata"
    },
    {
      "description": "Recurring webpage change monitoring for prices, inventory, availability, documentation, policies and competitors. Reuse the returned previous_hash on the next check. Costs $0.001 USDC on Base via x402.",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "ignore_selectors": {
            "items": {
              "type": "string"
            },
            "type": "array"
          },
          "include_current_text": {
            "type": "boolean"
          },
          "max_diff_chars": {
            "maximum": 50000,
            "minimum": 1000,
            "type": "integer"
          },
          "max_text_chars": {
            "maximum": 250000,
            "minimum": 1000,
            "type": "integer"
          },
          "previous_hash": {
            "type": "string"
          },
          "previous_text": {
            "type": "string"
          },
          "selector": {
            "type": "string"
          },
          "timeout_seconds": {
            "maximum": 60,
            "minimum": 5,
            "type": "integer"
          },
          "url": {
            "format": "uri",
            "type": "string"
          }
        },
        "required": [
          "url"
        ],
        "type": "object"
      },
      "name": "monitor_webpage_change"
    }
  ]
}

What the leaf hashes

{"body":"491d064fd400f0bee6027d901d4fe9e702dbda9653cbd7bc79230150569d665f","id":222659,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793028188825479,"prev":null,"subject":"aa433295-effc-44ea-83fe-11c9fb492c44","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. 0xd93486deb99b4c8d98c904dc739a90fd54752a9f88ee517b7ea4b9f8ea821b68
2. 0x05b3ec8b09a305578faf7e3deaee57588eb67bc6db4547b405cfd2686081ade8
3. 0x755eeea552c54ac0e2bbbe7443a7327f20ff402de61188344f30f99399519f55
4. 0xb5768231d78ae638b38827e3081f441194935fb23e2fb03a876a4a9ce9d0be50
5. 0x6d03838057e43013ca3986a9a3cf6bc2902a07b1bd132a07fab9c765da59ac87
6. 0x70a21e4456e02e0fb90ba8cafcf046acab667709ac319c80cfa2bb152f50f57f
7. 0x4ac3b3c381179b031017e81a907a4df2372cddb03e4aa41c2a2c35688133de3f
8. 0x94dfed167d481ecd148d278a500caf4104938bf8d150ae4b6e36d06d2b143dd1
9. 0xd650aae11fc4ec71a6d15a833a46afb8373c9dbda697aacbf624b13652ab472b
10. 0xbef0db8aab9733efc417d7a27c94356a006b86ef076eb4c35a8d217ef10b433b
11. 0xd96796540b8f5b592d8f03fc775e7a26bd00af394ce468ff886a43215a522475
12. 0x07e91966e8a0c43a0725bd3d523259064a93333c2900e6171b69ffbfd9f423f1
13. 0xcd9e3af1fa905ec61b99ee9442716d7c7a439aecacd018ec229a24def1cabf6b
14. 0x6b927d53caa5125cdba9255612d524976c691f8672796c3f0885ba2c5b3af1ad
15. 0x6dc40f983a3840a0ad927a9ca17f4ff1e3b649a6c735e2a09b140db7c2caf13b
16. 0x703f95866af09c5e5d6ead7411e9a10f964a41a2aff64d4a55ff0053c023a023
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae