Evidence row 561246

What was observed

{
  "count": 7,
  "tools": [
    {
      "description": "Find source-backed articles in an art, illustration, buying-guide, or creative-career category by category name or slug.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "category": {
            "maxLength": 120,
            "minLength": 1,
            "type": "string"
          },
          "limit": {
            "maximum": 25,
            "minimum": 1,
            "type": "integer"
          }
        },
        "required": [
          "category"
        ],
        "type": "object"
      },
      "name": "articles_by_category"
    },
    {
      "description": "Retrieve public metadata and the paid structured API URL for one article by slug. CMS-authorized clients may also request full Markdown directly from this tool.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "include_content": {
            "default": false,
            "type": "boolean"
          },
          "slug": {
            "maxLength": 200,
            "pattern": "^[a-z0-9-]+$",
            "type": "string"
          }
        },
        "required": [
          "slug"
        ],
        "type": "object"
      },
      "name": "get_article"
    },
    {
      "description": "List newly published art and illustration research with summaries, publication dates, canonical pages, and structured API URLs.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "limit": {
            "maximum": 25,
            "minimum": 1,
            "type": "integer"
          }
        },
        "type": "object"
      },
      "name": "latest_articles"
    },
    {
      "description": "Validate inputs for a benchmark-based art or illustration commission estimate covering deliverable, experience, complexity, finish, subjects, usage rights, revisions, rush timing, and expenses. Returns the paid x402 endpoint, current USDC price, dataset version, and exact request body without signing or spending funds.",
      "inputSchema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "additionalProperties": false,
        "properties": {
          "commission_type": {
            "description": "A quote_key returned by the free catalog endpoint.",
            "pattern": "^[a-z0-9-]{2,120}$",
            "type": "string"
          },
          "complexity": {
            "default": "standard",
            "enum": [
              "simple",
              "standard",
              "complex"
            ],
            "type": "string"
          },
          "expenses_usd": {
            "default": 0,
            "maximum": 100000,
            "minimum": 0,
            "multipleOf": 0.01,
            "type": "number"
          },
          "experience": {
            "default": "established",
            "enum": [
              "emerging",
              "established",
              "expert"
            ],
            "type": "string"
          },
          "finish": {
            "default": "polished",
            "enum": [
              "sketch",
              "polished",
              "rendered"
            ],
            "type": "string"
          },
          "revisions": {
            "default": 2,
            "maximum": 10,
            "minimum": 0,
            "type": "integer"
          },
          "rush": {
            "default": "none",
            "enum": [
              "none",
              "within_14_days",
              "within_7_days",
              "within_3_days"
            ],
            "type": "string"
          },
          "subjects": {
            "default": 1,
            "maximum": 20,
            "minimum": 0,
            "type": "integer"
          },
          "usage": {
            "default": "personal",
            "enum": [
              "personal",
              "editorial",
              "commercial_small",
              "commercial_large",
              "full_buyout"
            ],
            "type": "string"
          }
        },
        "required": [
          "commission_type"
        ],
        "type": "object"
      },
      "name": "prepare_commission_quote"
    },
    {
      "description": "Validate a company query and choose a citation-first Company Snapshot, Company Change Monitor, Vendor Risk Brief, or Company Dossier. Returns the paid x402 endpoint, exact USDC price, source coverage, and normalized request body without signing or spending funds.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "baseline_report_id": {
            "description": "Optional prior paid Agent Intelligence report ID for an exact evidence comparison.",
            "pattern": "^air_[a-f0-9]{32}$",
            "type": "string"
          },
          "cik": {
            "description": "Optional SEC Central Index Key.",
            "pattern": "^[0-9]{1,10}$",
            "type": "string"
          },
          "company_name": {
            "description": "Legal or commonly used company name.",
            "maxLength": 180,
            "minLength": 2,
            "type": "string"
          },
          "domain": {
            "description": "Bare domain only, without a URL path.",
            "pattern": "^(?=.{3,253}$)(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\\.)+[a-zA-Z]{2,63}$",
            "type": "string"
          },
          "jurisdiction": {
            "description": "Optional country or jurisdiction hint.",
            "maxLength": 80,
            "minLength": 2,
            "type": "string"
          },
          "lei": {
            "description": "Optional Legal Entity Identifier.",
            "pattern": "^[A-Z0-9]{20}$",
            "type": "string"
          },
          "product": {
            "enum": [
              "company-snapshot",
              "company-change-monitor",
              "vendor-risk",
              "company-dossier"
            ],
            "type": "string"
          },
          "since": {
            "description": "Optional monitoring-window start. Company Change Monitor defaults to 30 days ago.",
            "format": "date-time",
            "type": "string"
          }
        },
        "required": [
          "product",
          "company_name"
        ],
        "type": "object"
      },
      "name": "prepare_company_intelligence"
    },
    {
      "description": "Find source-backed art, illustration, artist-career, and buying-guide research by topic or question. Returns titles, summaries, publication dates, canonical pages, and structured API URLs.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {
          "limit": {
            "maximum": 25,
            "minimum": 1,
            "type": "integer"
          },
          "query": {
            "maxLength": 200,
            "minLength": 2,
            "type": "string"
          }
        },
        "required": [
          "query"
        ],
        "type": "object"
      },
      "name": "search_articles"
    },
    {
      "description": "Return free x402 v2 payment instructions, network and asset metadata, working client examples, and the exact 0.001 USDC wallet-readiness endpoint. This tool never signs or spends funds.",
      "inputSchema": {
        "additionalProperties": false,
        "properties": {},
        "type": "object"
      },
      "name": "x402_payment_quickstart"
    }
  ]
}

What the leaf hashes

{"body":"1818a043a08d96670c2f626b2457f4c4203b1e479cd75e4624d047f7efe3f5c3","id":561246,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793136811035107,"prev":null,"subject":"607742c8-22f0-436a-9bac-78f8e6449e8f","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. 0xa8e66ce3d04a3c4029f4f5597d3a595e148b0e5876f9c1dfdb0ece6d3c7db18f
2. 0xcb81914cdbaec602a25375db09996a652a6fcaddcd4b56e0f93dfdc93512c0f3
3. 0x9eee102eef3229a45de7af2a50a1ef96a1280292bec28c3ca015889ff2d57eef
4. 0x5b2467e076792d9b2f3e15f2d46bf2eba622ad37fdc6dc40afeeade5536de4c6
5. 0x228eb63d4ce3b2fc668a8c1b64fbe4817bd2485425f2e54697e89a535b9f76ed
6. 0x0567f1466f1f6d410787cb41384ed8596d5ba5855537c0f8c7dcd9b7c01d28b8
7. 0xada0331c406b3b5779152e6f60ee957c746c2d1370c529161ba1eac6e0253bc6
8. 0xf207973bdc3577fd04190825465d9fdf54860b0dc102855f3c73ab426ae2d7b6
9. 0xc9dfa1a93783e12a26041b4c2598841ee8f6496fe9c474d1eae6dbdb64182035
10. 0x4bf97e42a5860ebb71dc4706a6ee027ee8be9f6a913bae5adcb7c723215a2134
11. 0xaa137eb24ef2339458d7aff21fe0ca92a9e2fc5593798b8e923cb9f5717e4be9
12. 0xa08d28946903c13551b0c68269e38bfa91b368f8e33183ac691c11e2b5a9506a
13. 0xb37156a04839055daed26674da38864f8dae598cab9742c6fb3e74eb3178f2d4
14. 0x0644f7e2a4b5bf9b66f185cc3fbb766d456ad94490183852f4c6db5855114cc5
15. 0xa3fff4662cd48659f5bafd0612931759a90e53a7b4209ed8f26f6594a07bb547
16. 0x64c405a28e8819716221eb2529fe4ce277ab08025e17e685cbd5ece75ceb75c7
17. 0xf30fddbf4811226c58e8f0daf36fddd79fc5f1356b592bb1d99a8061ddbabe66
18. 0x2bf8151e5f157dd183b9de6fa00469551932a7a6e3f33a694895000ac9061197
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4