Evidence row 295791

What was observed

{
  "count": 10,
  "tools": [
    {
      "description": "Newest projects in the archive first, optionally filtered by category: architecture, interiors, design, photography or art.",
      "inputSchema": {
        "properties": {
          "category": {
            "description": "Optional category filter: architecture, interiors, design, photography or art.",
            "type": "string"
          },
          "limit": {
            "description": "Max results (default 10, max 20).",
            "type": "number"
          }
        },
        "type": "object"
      },
      "name": "browse"
    },
    {
      "description": "One project chosen at random from the archive. Editorial serendipity: the way a reader opens a magazine to an unplanned spread.",
      "inputSchema": {
        "properties": {},
        "type": "object"
      },
      "name": "discover"
    },
    {
      "description": "Retrieve the full record for one Thisispaper project by id (the id returned by search). Returns title, text and the public url.",
      "inputSchema": {
        "properties": {
          "id": {
            "description": "Project id from a search result, e.g. 'audeum-kengo-kuma'.",
            "type": "string"
          }
        },
        "required": [
          "id"
        ],
        "type": "object"
      },
      "name": "fetch"
    },
    {
      "description": "Mint a FREE Thisispaper Intelligence API key (200 calls/month) for an email address. The key is shown once; use it as Authorization: Bearer tip_live_... on this MCP endpoint and on the REST API. Max 3 keys per email.",
      "inputSchema": {
        "properties": {
          "email": {
            "description": "Your email address. The key is tied to it.",
            "type": "string"
          }
        },
        "required": [
          "email"
        ],
        "type": "object"
      },
      "name": "get_api_key"
    },
    {
      "description": "Full metadata for one project: machine-written description, design language, details and dimensions, plus the public URL.",
      "inputSchema": {
        "properties": {
          "slug": {
            "description": "Project slug, e.g. 'audeum-kengo-kuma'.",
            "type": "string"
          }
        },
        "required": [
          "slug"
        ],
        "type": "object"
      },
      "name": "get_project"
    },
    {
      "description": "Every hand-curated Thisispaper guide and edition. Guides are places: Tokyo, Kyoto, Lisbon, Copenhagen. Editions are themes: Black Matter (black as a way of handling light), Jutaku (Japanese houses on narrow plots), Icons, Off-the-Grid, Monographs on single architects. Returns each one's title, type, one-line description, cover image and public URL. Filter by city or by type. The full guides and editions are reserved for Thisispaper+ members.",
      "inputSchema": {
        "properties": {
          "city": {
            "description": "Optional city or region filter, e.g. 'tokyo' or 'portugal'. Applies to guides.",
            "type": "string"
          },
          "type": {
            "description": "Optional: 'guide' for places, 'edition' for themes. Omit for both.",
            "enum": [
              "guide",
              "edition"
            ],
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "list_guides"
    },
    {
      "description": "Search 2,500+ hand-curated architecture, design, photography and art projects from Thisispaper. Returns a list of results with id, title and url.",
      "inputSchema": {
        "properties": {
          "query": {
            "description": "Search terms, e.g. 'concrete chapel' or 'art exhibitions'.",
            "type": "string"
          }
        },
        "required": [
          "query"
        ],
        "type": "object"
      },
      "name": "search"
    },
    {
      "description": "Search by taste metadata: material, light, color, mood, composition, subject. Unique to Thisispaper: these tags were written during human curation. Provide at least one dimension; results are ranked by how many dimensions match, then by recency.",
      "inputSchema": {
        "properties": {
          "color": {
            "description": "Palette, e.g. 'white', 'earth tones', 'green'.",
            "type": "string"
          },
          "composition": {
            "description": "Composition, e.g. 'symmetrical', 'geometric', 'minimal'.",
            "type": "string"
          },
          "light": {
            "description": "Light quality, e.g. 'diffused', 'natural', 'dramatic'.",
            "type": "string"
          },
          "limit": {
            "description": "Max results (default 10, max 20).",
            "type": "number"
          },
          "material": {
            "description": "Material, e.g. 'rammed earth', 'concrete', 'timber'.",
            "type": "string"
          },
          "mood": {
            "description": "Mood, e.g. 'austere', 'warm', 'monumental'.",
            "type": "string"
          },
          "subject": {
            "description": "Subject, e.g. 'chapel', 'house', 'pavilion'.",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "search_by_taste"
    },
    {
      "description": "Search 2,500+ hand-curated architecture, design, photography and art projects from Thisispaper. Returns ranked summaries (name, studio, city, year, category, intro, thumbnail, url, citation_url, provenance). Without an API key, results are capped at 5; pass Authorization: Bearer tip_live_... for full results.",
      "inputSchema": {
        "properties": {
          "limit": {
            "description": "Max results (default 10, max 20).",
            "type": "number"
          },
          "query": {
            "description": "Search terms, e.g. 'concrete chapel' or 'japanese teahouse'.",
            "type": "string"
          }
        },
        "required": [
          "query"
        ],
        "type": "object"
      },
      "name": "search_projects"
    },
    {
      "description": "Nearest projects to a given slug by visual + semantic similarity (precomputed SigLIP neighbours). Use the slug from search_projects results.",
      "inputSchema": {
        "properties": {
          "limit": {
            "description": "Max results (default 10, max 20).",
            "type": "number"
          },
          "slug": {
            "description": "Project slug, e.g. 'audeum-kengo-kuma'.",
            "type": "string"
          }
        },
        "required": [
          "slug"
        ],
        "type": "object"
      },
      "name": "similar_projects"
    }
  ]
}

What the leaf hashes

{"body":"cc237af07972280f573d8ba6cae9b735ded298888f0d2645f83fcb9ded90427c","id":295791,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793051166297595,"prev":null,"subject":"7d7e535e-5fa9-4dc3-97a5-c5969a1111b2","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. 0x860d34994715504e3569ddf8c770a90897c30b17e6cd4b2ace6bb3680225c4db
2. 0x7a71eb95113f5830c4d8d095df919d10354c2b6b0304bb246c352a9c1561877f
3. 0x0346c654dd69fec7d8d21261d1eac978710ad36555793d713cba0f32d82e0cde
4. 0x6577e3fb5c89fc4b018b77706290983428e753ffde97525dec26f0cf7e85e45d
5. 0xfa74a9503448c731c158ab366e251ea2576aa4c73f81c29e5573c242915091c1
6. 0xca51f298da587b73f2a2095f427f01c90430fda11efc05174dbd12e5d0526263
7. 0xe95e7420fcf022707e5d1e09af8bd935ae856241e97cb449c1b6e1ba1dcba675
8. 0x3ae5bb81a4f335d3465b38a5ae187acd5d3385f143d94c7072343c98653c2f2b
9. 0xd5e7fe5e22d0f721add84c87198cf47b769770c1756b2a9721525c366e108dbc
10. 0x0d847b9eb30e194e701d2d4f8af4f34ef43f6c033fe5e001b93f122bdbea7c80
11. 0xd6d2fb435c815b0341c19086a636cc9a706a6129405e2030054a243942b686fe
12. 0x146f43471a3bde6d8a04e87b6afd3ee6860c6e38a009f86aee705ce722b67748
13. 0x91c2ae93ec20c7fed5088112fe3941ca622dfb3f8f1022c4844726c361244bd4
14. 0x0eff463856b0992d53ab7d8c0b97c71541413358bdd445710c1e4b6aeb4d8f78
15. 0x7eb603d37f0f22dae1ea013e391889906ffc0139ff26e25b044bee38eec8f9b2
16. 0x2b6e23e3624a1b66e1d2298cfbce99a93ce6b13d24a58112a71802d79c5f7a76
17. 0xd21942ae3214eff88e08ab04884fd4b11958b51af9a0741b7668e2d07a2c56c9
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae