Evidence row 3361573

What was observed

{
  "count": 11,
  "tools": [
    {
      "description": "Get one published academy course by its slug, with its objectives, lessons and FAQ. Exam questions and answers are never returned.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "slug": {
            "description": "The course slug.",
            "maxLength": 100,
            "minLength": 1,
            "pattern": "^[a-z0-9]+(-[a-z0-9]+)*$",
            "type": "string"
          }
        },
        "required": [
          "slug"
        ],
        "type": "object"
      },
      "name": "get_course"
    },
    {
      "description": "Get one published psilocybin center by its slug.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "slug": {
            "description": "The listing slug.",
            "maxLength": 100,
            "minLength": 1,
            "pattern": "^[a-z0-9]+(-[a-z0-9]+)*$",
            "type": "string"
          }
        },
        "required": [
          "slug"
        ],
        "type": "object"
      },
      "name": "get_listing"
    },
    {
      "description": "Get one affiliate product by its slug, with its page and outbound link.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "slug": {
            "description": "The product slug.",
            "maxLength": 100,
            "minLength": 1,
            "pattern": "^[a-z0-9]+(-[a-z0-9]+)*$",
            "type": "string"
          }
        },
        "required": [
          "slug"
        ],
        "type": "object"
      },
      "name": "get_product"
    },
    {
      "description": "Get the number of published psilocybin centers, places and categories, and when the data last changed.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {},
        "type": "object"
      },
      "name": "get_stats"
    },
    {
      "description": "List categories with their psilocybin center counts.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {},
        "type": "object"
      },
      "name": "list_categories"
    },
    {
      "description": "List the published academy courses with their level, length, pass mark and certificate validity.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "level": {
            "description": "Only courses of this level.",
            "enum": [
              "foundations",
              "practitioner",
              "specialist"
            ],
            "type": "string"
          },
          "limit": {
            "default": 50,
            "description": "Most courses to return.",
            "maximum": 50,
            "minimum": 1,
            "type": "integer"
          }
        },
        "type": "object"
      },
      "name": "list_courses"
    },
    {
      "description": "List countries, regions and cities that have psilocybin centers.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {},
        "type": "object"
      },
      "name": "list_places"
    },
    {
      "description": "List the product categories with their product counts.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {},
        "type": "object"
      },
      "name": "list_product_categories"
    },
    {
      "description": "List the affiliate products, with the price each had on the day it was checked. Filter by product category.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "category": {
            "description": "A product category slug.",
            "maxLength": 100,
            "minLength": 1,
            "pattern": "^[a-z0-9]+(-[a-z0-9]+)*$",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "list_products"
    },
    {
      "description": "List where the psilocybin center data comes from, with the license and refresh of each source.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {},
        "type": "object"
      },
      "name": "list_sources"
    },
    {
      "description": "Search published psilocybin centers by text, place and category.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "category": {
            "description": "Category slug, from /categories. A parent slug also matches its children.",
            "maxLength": 100,
            "minLength": 1,
            "pattern": "^[a-z0-9]+(-[a-z0-9]+)*$",
            "type": "string"
          },
          "city": {
            "description": "City slug, from /places.",
            "maxLength": 100,
            "minLength": 1,
            "pattern": "^[a-z0-9]+(-[a-z0-9]+)*$",
            "type": "string"
          },
          "country": {
            "description": "ISO 3166-1 alpha-2 country code, any case. A country the directory does not cover, as listed in /places, gives 400.",
            "pattern": "^[A-Za-z]{2}$",
            "type": "string"
          },
          "cursor": {
            "description": "`page.nextCursor` from the previous response. Opaque. Send the same filters and `limit`.",
            "maxLength": 200,
            "minLength": 1,
            "type": "string"
          },
          "limit": {
            "default": 20,
            "description": "Items per page.",
            "maximum": 50,
            "minimum": 1,
            "type": "integer"
          },
          "q": {
            "description": "Search text, with at least one letter or digit. Matches name, categories, attributes, description and place. Typos fall back to close matches.",
            "maxLength": 200,
            "minLength": 1,
            "type": "string"
          },
          "region": {
            "description": "Region slug, from /places.",
            "maxLength": 100,
            "minLength": 1,
            "pattern": "^[a-z0-9]+(-[a-z0-9]+)*$",
            "type": "string"
          },
          "sort": {
            "description": "`relevance` needs `q` and is the default with it. `name` is the default without `q`. `recent` is newest first.",
            "enum": [
              "relevance",
              "name",
              "recent"
            ],
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "search_listings"
    }
  ]
}

What the leaf hashes

{"body":"6180995a960b003b9ada8788bfd50613420db7754e99794802e94aa253dd459e","id":3361573,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793857024791121,"prev":2085006,"subject":"0080e62e-04a2-4dcc-be59-8a467f768d95","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-11-05 (322504 rows).

1. 0xff80dd7721077cee4f326dccd618f0ae7ef1cd5549e1a6c1cc6425739187cd06
2. 0x7e56d7502ff23291bd8d08040c285e14bdf0b4e6bcb000bf166cd7b8785ee3ee
3. 0xa520e6e71d660bda7dfc17ae6bad903ddf8bdfe665f2292ba9c940d360e9155c
4. 0x913b3147646fe5e21aa4df0101c5b1cfe3a5df604ae408c40ab454ddc5fcf9c3
5. 0x96bbac3b39f8402db32aa6ef3366fafe60197eafe41a61a3be9843fd87954b2e
6. 0x5d7b70f563b1d243d08be1588a8793f183a53fd7d5f126c8aef9636e313f3576
7. 0xeac3a3632a2bc82a934ea26c2aaed2f2c063daff6257af7c7ca2c81a1d70b7f9
8. 0x8cab0f99a621e147a4bb74f748d0d85673a343167d3bc31a0983d910df4d5547
9. 0x64cdb52d9b86592971bf9e3c9f88c63034aba2905f0a12f6a30cfb1da49946db
10. 0x634613c2ad4ac04562031990c22f54105517fb60b8eb55bb7b3ffc5df8ed121f
11. 0x17f76950b972bb7768da1ed4460a127abc6fc8b49a10d0f18af099d55072be7f
12. 0x96089f99041b0447b39397a53cd16be1d825106c3cf5ed0904de1f7169d97047
13. 0xc52fdd499240d4cae496484b3da9c532542859f0626ea2a2fc243490680039e2
14. 0x46e57eb471bdfedc5371f9f8dd93e03a0ef82a84f79b917a40533d34f61e890c
15. 0x595efddb5b196a921c775c54d0aa541065f1802bfefb8bd003a60b16925c4b58

Day root

0x9f0215efb0252701dc86d5600ce95f276cccc716759bf112525ae863f698d128

Chained

0xc54ddff800630c6cd9656f99e7d6a61adce99bf1cea37121600598b0a9a720d2

Published

On Arc Testnet, block 70942081: 0x88f612ad94ca63af4e4e9faab9f34b665b41f03828afac1571ad013cc62bba94