Evidence row 276826

What was observed

{
  "count": 4,
  "tools": [
    {
      "description": "Creates a hosted checkout URL for one or more trusted merchant-catalog products. Legacy productId + quantity input remains supported; new integrations should use items[]. VibeCart resolves all prices server-side. This can contact Stripe but never charges by itself; the customer must complete Stripe Checkout.",
      "inputSchema": {
        "additionalProperties": false,
        "oneOf": [
          {
            "required": [
              "productId"
            ]
          },
          {
            "required": [
              "items"
            ]
          }
        ],
        "properties": {
          "items": {
            "description": "Trusted product IDs and quantities for a multi-item checkout.",
            "items": {
              "additionalProperties": false,
              "properties": {
                "productId": {
                  "description": "A trusted server-side catalog product ID.",
                  "minLength": 1,
                  "type": "string"
                },
                "quantity": {
                  "default": 1,
                  "description": "Whole-number quantity from 1 through 99.",
                  "maximum": 99,
                  "minimum": 1,
                  "type": "integer"
                }
              },
              "required": [
                "productId"
              ],
              "type": "object"
            },
            "maxItems": 50,
            "minItems": 1,
            "type": "array"
          },
          "productId": {
            "description": "Legacy single-product input. Use either productId or items, not both.",
            "minLength": 1,
            "type": "string"
          },
          "quantity": {
            "default": 1,
            "description": "Legacy single-product quantity.",
            "maximum": 99,
            "minimum": 1,
            "type": "integer"
          }
        },
        "type": "object"
      },
      "name": "vibecart.create_checkout"
    },
    {
      "description": "Returns concise Next.js App Router guidance for installing VibeCart with trusted catalog pricing, multi-item checkout, and the shared MCP endpoint.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {},
        "type": "object"
      },
      "name": "vibecart.get_integration_instructions"
    },
    {
      "description": "Looks up one product and its trusted USD-cent price from the configured merchant catalog. Does not access Stripe or create a checkout.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "productId": {
            "description": "A stable ID returned by vibecart.list_products.",
            "minLength": 1,
            "type": "string"
          }
        },
        "required": [
          "productId"
        ],
        "type": "object"
      },
      "name": "vibecart.get_product"
    },
    {
      "description": "Lists products from the configured trusted merchant catalog. Use the returned stable IDs for product lookup or checkout.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {},
        "type": "object"
      },
      "name": "vibecart.list_products"
    }
  ]
}

What the leaf hashes

{"body":"1a34244adc510f3ea01f9f3806a881d91d834f76cb51fb260de2e097a23a92b2","id":276826,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793041581600172,"prev":null,"subject":"13c8d4f3-8928-46b8-9d1f-f62fc8552103","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. 0x289e85e13c91308ef81c860e38fd1a9bee15e4fcc1c70f89559154d482be8c8c
2. 0xdfa2d53676d44f63d17eac2a4145876b04949011ed98d47e82c9ba6432e9fbfb
3. 0xde9d161b9ad90a6e491278c31cc033c1b737cac2310c982c462fca160db365a3
4. 0xe927243a3e3f08fe5cbd0b0b9ebea726cc88021efa327ee862d0e7e9c36a5913
5. 0xb8398c96f37dfea7515a60a8dc96b464b2c15850d4ef7302229841742c488ea2
6. 0xb0534e920f58828ca5b07eaffca2164c631b272c21ae47b87a8dae460afe9e5a
7. 0x50e39bb8e2776958c903fea355269e0c1fffb6a259ebbda72e4a3e4dc4bb1f7d
8. 0x4389016b0de43a38e1d05bf3bb8afaa6930b25a2050e37a0b359cf1bb24ee7eb
9. 0x76f4df2259c5c1019ba21e4193d3277a741d5526d4856dfe29a5215b5a57eae9
10. 0x7f7b5e4017d0ebdc6e6e7ad11b8fd65cdecee6414f31e6c211b1dd0c217f99a4
11. 0x29ff42cd28c985738cc9b9746505241162025974e4e3ebf7c6681609002132fa
12. 0x364047261f51ecdbe278514b4f415358118ef4644f7124e15a40f80a86f6a05b
13. 0x16a8fb19a5e4f4535e7cb3fce5c15ecfa188586bb74e347ee71164f8af27dfe1
14. 0xd843afcced75dedd39194ff9bd12326b88099e6112686db2299392d022dc3146
15. 0xc3a6a3ae44ec0da1848b16d40c45d7aac97a67352eea8df18e0f26edabea8a2f
16. 0x06d71bfa7d8b41d62c8836efc2c601e1cc3772d9453596b2ae4950887f3310ca
17. 0x8c756542e482157df0c36464d75c937b845e4423dbbcfad08f0cf8d5a16b9a13
18. 0x20704208aa6923d6b2450ef74ede87a6e0265d46447926038fe9506e9e154b2d
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae