Evidence row 577578

What was observed

{
  "count": 3,
  "tools": [
    {
      "description": "List the currently available x402 service ranking categories. Free, no payment required.",
      "inputSchema": {
        "properties": {},
        "type": "object"
      },
      "name": "list_rank_categories"
    },
    {
      "description": "Get a ranked list of the best x402 pay-per-call services for a task category (scored by price, usage volume, and recency, from the live Coinbase Bazaar feed). Use list_rank_categories first to see valid categories. Paid: $0.02 per call in USDC on Base via x402 — call once without x_payment to receive the payment challenge.",
      "inputSchema": {
        "properties": {
          "category": {
            "description": "Category name from list_rank_categories (e.g. search, ai-gateway, trading-intel)",
            "type": "string"
          },
          "x_payment": {
            "description": "Optional X-PAYMENT header value from a completed x402 payment. Omit on first call to receive the payment challenge; complete the payment with your x402 wallet tooling, then retry with this set.",
            "type": "string"
          }
        },
        "required": [
          "category"
        ],
        "type": "object"
      },
      "name": "rank_x402_services"
    },
    {
      "description": "Render any public URL in a real headless browser and get back a screenshot (PNG image), PDF, or the JavaScript-rendered HTML. Solves the empty-shell problem when plain HTTP fetches hit client-rendered pages. Paid: $0.02 per call in USDC on Base via the x402 protocol — call once without x_payment to receive the payment challenge.",
      "inputSchema": {
        "properties": {
          "format": {
            "default": "screenshot",
            "enum": [
              "screenshot",
              "pdf",
              "html"
            ],
            "type": "string"
          },
          "fullPage": {
            "default": false,
            "type": "boolean"
          },
          "height": {
            "default": 800,
            "maximum": 1080,
            "minimum": 240,
            "type": "integer"
          },
          "url": {
            "description": "Public http/https URL to render",
            "type": "string"
          },
          "waitMs": {
            "default": 0,
            "maximum": 5000,
            "minimum": 0,
            "type": "integer"
          },
          "width": {
            "default": 1280,
            "maximum": 1920,
            "minimum": 320,
            "type": "integer"
          },
          "x_payment": {
            "description": "Optional X-PAYMENT header value from a completed x402 payment. Omit on first call to receive the payment challenge; complete the payment with your x402 wallet tooling, then retry with this set.",
            "type": "string"
          }
        },
        "required": [
          "url"
        ],
        "type": "object"
      },
      "name": "render_url"
    }
  ]
}

What the leaf hashes

{"body":"f411dcc83e8b46ee6c0362e287c69c7a9f32de2a5f1b2a4f87fc3c24647cf9e7","id":577578,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793142660420192,"prev":null,"subject":"7e7a0c9f-e41e-4c9e-8abc-82d88dd33aac","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. 0xc0530e7fedb750e02b044ea3a2dfa9f1638ff82d929c92a5ba06d0757ca3244d
2. 0xe9831ce4f5b65d915f9645292e8b475c6d77202ef9c0a28b6c554f7577ca6dd4
3. 0xb3c954e7c566b63b68ac83bbf82c568b91d44f58a5a68219bc14df33da31e781
4. 0x266acd9cede8ae207afbde61ee114045bbe0a0d4815ee59615f7f346009518d4
5. 0x2c1622689f658d069af24b50ab1de1c2897ac1094094c2e935410ae2cd22012f
6. 0xf123dc1d8dbc7503a813a8512b83bbae167f8cb0979e6fc5cf967745218d4afc
7. 0x6a04c1af31a5e29f2489c11dd6bb2d048f08e2bc2ad02e3cd20f7b9e1d93680f
8. 0x48a611f054c07889cd1692e928072db69995a0c08ec01c8f58f037008e621c34
9. 0x13c8f986e243b370d07b38f2060a7d9b65f8fbc0d7086c5cb060111ae67dd108
10. 0xaf97a9427f16ec846cbf90266f963eafe897184ecd205ab609c7322ef6cc2560
11. 0x7ff6a586e9498a807b90cc0724f36067102a7bfb70c439f694c884710ed4910a
12. 0xa9bcdb8be937595e637058d98ed979d02cbac590262daa97def86c50ca63628b
13. 0xb4800af1fe2ae822adba5c087faf1dc0bc2d7c9de2e3e602a2b65aefc1d53c94
14. 0xa453d1738637a5c663802d07ce095aa340c80d53a4288ae277a72e265868ce4e
15. 0x73341bb09dd901ca47f26173883431496e3d98d6b0fb5b89f36218126d46c5d4
16. 0xa94627de1af0e823832e05a9069b304ecccb8c0cdb8f9cfc4f2039bfb9799dc5
17. 0xdf1105afdc109de3c09a98fc8a3864159ad964e6f49b635c105a27a1e1f14310
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4