Evidence row 258294

What was observed

{
  "count": 10,
  "tools": [
    {
      "description": "Convert office documents and images between formats. Documents (docx, doc, xlsx, xls, pptx, ppt, odt, rtf, html, txt, csv) to pdf, docx, odt, txt, xlsx or csv; images between png, jpg, webp and gif. Use when a user or system needs a file in a different format. Send {url} or {base64}, plus filename (with extension) and to. Returns the converted file. Errors: 400 unsupported pair, 422 conversion failed. Price: $0.02 USDC per call (x402).",
      "inputSchema": {
        "properties": {
          "base64": {
            "description": "File contents, base64-encoded (max 20 MB). Provide url OR base64.",
            "type": "string"
          },
          "filename": {
            "description": "Original filename with extension, e.g. report.docx",
            "type": "string"
          },
          "to": {
            "description": "Target format, e.g. pdf, docx, txt, png, webp",
            "type": "string"
          },
          "url": {
            "description": "Public URL of the file. Provide url OR base64.",
            "type": "string"
          }
        },
        "required": [
          "filename",
          "to"
        ],
        "type": "object"
      },
      "name": "convert_file"
    },
    {
      "description": "Turn HTML you write (an invoice, report, letter or certificate) or a public web page into a print-quality PDF, rendered by Chrome with backgrounds and CSS. Use when you need to hand a person a polished, printable document. Send {html} or {url}; optional format (A4, Letter, A3, A5, Legal) and landscape. Returns the PDF. Errors: 400 missing input or private URL, 413 HTML over 2 MB. Price: $0.01 USDC per call (x402).",
      "inputSchema": {
        "properties": {
          "format": {
            "enum": [
              "A4",
              "Letter",
              "A3",
              "A5",
              "Legal"
            ],
            "type": "string"
          },
          "html": {
            "description": "HTML to render. Provide html OR url.",
            "type": "string"
          },
          "landscape": {
            "type": "boolean"
          },
          "url": {
            "description": "Public page to print. Provide html OR url.",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "html_to_pdf"
    },
    {
      "description": "Read the text from a photo, screenshot, scan or scanned PDF (OCR). If the PDF already has real text, that is returned instead (faster and exact). Use when text is only available as an image: receipts, letters, forms, signs. Send {url} or {base64}, optional lang (default eng, e.g. eng+fra). Max 20 MB, 20 pages. Returns {text, method, pages}. Errors: 400 bad input, 413 too large. Price: $0.01 USDC per call (x402).",
      "inputSchema": {
        "properties": {
          "base64": {
            "description": "File contents, base64-encoded (max 20 MB). Provide url OR base64.",
            "type": "string"
          },
          "lang": {
            "description": "Tesseract language code(s), e.g. eng or eng+fra",
            "type": "string"
          },
          "url": {
            "description": "Public URL of the file. Provide url OR base64.",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "ocr_read_text"
    },
    {
      "description": "Extract every table from a PDF and return it as rows of cells in JSON, with the page number of each table. Use when you need numbers from financial statements, invoices, price lists or reports that are locked in a PDF. Send {url} or {base64}. Max 20 MB, first 50 pages. Returns {pages, tables:[{page, rows}], truncated}. Errors: 400 not a PDF, 413 too large. Price: $0.01 USDC per call (x402).",
      "inputSchema": {
        "properties": {
          "base64": {
            "description": "File contents, base64-encoded (max 20 MB). Provide url OR base64.",
            "type": "string"
          },
          "url": {
            "description": "Public URL of the file. Provide url OR base64.",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "pdf_tables_to_json"
    },
    {
      "description": "Render any public web page in a real Chrome browser and return a PNG screenshot. Use when you need to see how a page looks, check a layout, capture visual evidence, or read content that only appears after JavaScript runs. Options: width 320-2560 (default 1280), full=true for the whole page. Errors: 400 bad or private URL, 504 page took over 30s. Price: $0.01 USDC per call (x402).",
      "inputSchema": {
        "properties": {
          "full": {
            "description": "true = full-page screenshot",
            "enum": [
              "true",
              "false"
            ],
            "type": "string"
          },
          "url": {
            "description": "Page to capture (http/https, public)",
            "type": "string"
          },
          "width": {
            "description": "Viewport width in pixels, 320-2560",
            "type": "string"
          }
        },
        "required": [
          "url"
        ],
        "type": "object"
      },
      "name": "screenshot_webpage"
    },
    {
      "description": "Transcribe speech from an audio or video file (mp3, m4a, wav, ogg, mp4, webm) up to 15 minutes, using Whisper. Language is detected automatically. Use when you need the words from a voice note, meeting, podcast clip or video. Send {url} or {base64}, optional language (2-letter code). Returns {language, duration, text, segments with start/end times}. Errors: 413 over 15 minutes, 422 not audio. Price: $0.03 USDC per call (x402).",
      "inputSchema": {
        "properties": {
          "base64": {
            "description": "File contents, base64-encoded (max 20 MB). Provide url OR base64.",
            "type": "string"
          },
          "language": {
            "description": "Optional 2-letter language code, e.g. en",
            "type": "string"
          },
          "url": {
            "description": "Public URL of the file. Provide url OR base64.",
            "type": "string"
          }
        },
        "type": "object"
      },
      "name": "transcribe_audio"
    },
    {
      "description": "Check a UK company on the official Companies House register by company number: name, status (active, dissolved, liquidation), type, incorporation date, registered address, SIC codes, accounts due or overdue, charges, insolvency history and current directors. Use for supplier checks, due diligence, or confirming a business is real and active. Errors: 400 invalid number, 404 not found. Price: $0.005 USDC per call (x402).",
      "inputSchema": {
        "properties": {
          "number": {
            "description": "Company number, e.g. 00445790 (leading zeros optional)",
            "type": "string"
          }
        },
        "required": [
          "number"
        ],
        "type": "object"
      },
      "name": "uk_company_check"
    },
    {
      "description": "Look up any UK postcode and get latitude/longitude, local council, county, ward, parish, parliamentary constituency, region and country, from official ONS data. Use when you need to place a UK address on a map, work out which council or MP covers it, or check a postcode is real. Spaces optional. Errors: 400 invalid format, 404 postcode not found. Price: $0.001 USDC per call (x402).",
      "inputSchema": {
        "properties": {
          "postcode": {
            "description": "UK postcode, e.g. SW1A1AA",
            "type": "string"
          }
        },
        "required": [
          "postcode"
        ],
        "type": "object"
      },
      "name": "uk_postcode_lookup"
    },
    {
      "description": "Fetch a public web page and return just the main article as clean Markdown, with title, byline and excerpt. Menus, ads and footers are removed. Use when you need to read, summarise or quote a web page cheaply without parsing HTML yourself. Returns JSON {title, byline, siteName, excerpt, markdown}. Errors: 400 bad or private URL, 422 no readable article, 502 site returned an error. Price: $0.003 USDC per call (x402).",
      "inputSchema": {
        "properties": {
          "url": {
            "description": "Page to read (http/https, public)",
            "type": "string"
          }
        },
        "required": [
          "url"
        ],
        "type": "object"
      },
      "name": "webpage_to_markdown"
    },
    {
      "description": "Check whether a website is up right now: HTTP status, response time in ms, full redirect chain, and the SSL certificate's validity, issuer and days until expiry. Use when monitoring a site, diagnosing a broken link, or warning that a certificate is about to expire. A site that is down still returns 200 with up:false and the error. Errors: 400 bad or private URL. Price: $0.002 USDC per call (x402).",
      "inputSchema": {
        "properties": {
          "url": {
            "description": "Site to check (http/https)",
            "type": "string"
          }
        },
        "required": [
          "url"
        ],
        "type": "object"
      },
      "name": "website_status_check"
    }
  ]
}

What the leaf hashes

{"body":"a87525b019949d82a5bb6e7152940575f34b6d1f90e08389379d14d597993fa8","id":258294,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793030040842160,"prev":null,"subject":"84500c42-a109-4420-a988-71a7ecab15c6","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. 0xb10ad4c2a91f7578833fc08cb7824fa12baa2c875b9fcd2741cf20c066149091
2. 0xcd9f928acb8b1f7654c0128de2f430eb788aafbb29cc4da8ac3cf4b3e2a08089
3. 0x0fea830c44e2edfe5d0714ccc8c1ae9451da8481ad3513d67bc668a2d483a6f0
4. 0x107dea58222456ee495a83f7759330dede740d445b34ca1fd771609ffa3182a6
5. 0x19a68936bc5b7017626f734bb273b9f022494b26015547629056acf2262e1f0c
6. 0xb7f2f1a0f7aca1a48faac79056bd236446ea6f29fba182b691315e9c4aeb96b1
7. 0x0fe63cc368ef932331e4e3dc178dc2a7051d5d64890b2dc1dfc8dd405e7fff8c
8. 0xf9f6d5ea3454629c2c1ddfb570f924ae4e22c84075693d82042c62ee285de1f7
9. 0x4c9f2c8eb5804981aa8557af0650886c08f97c99c0ce09bcf3775e56672fb2aa
10. 0x55838b11251efb24add31c997e02aac1cdf6d78a790f4178057a4c2095a5d448
11. 0x68459613b28284909eadec125bcf23808811e99ecfabc229bf7deb2178ab9826
12. 0xce1aeb889b974291cea1fbfd01595655bd2c1b3636dc5b56eeb8904adb9f6c65
13. 0x3b1c0e225d1b1cb24cd5d5ea4af2de20ed68a1eaf8b61924ed1b81e4b9cf7e39
14. 0x083427e39db4dd470662401f6db5db8fadf084fc4274cf8621b368416952b78b
15. 0x1a74ed3b3756b9cd946da49701bcec120ec88645013da99fa9eea60b39e1a570
16. 0x123ec8bee20ddc55223eeef5a4f4d6c4b6416515adbb911c56759f5cde56e452
17. 0xd0651cb9bc8155eb52b5247d506e74b8a935057dc190ba52091702ac25ed3a40
18. 0x9a9024edb5069d88a324facb310a5ce8e495214bbaa968f077bede437390194f
19. 0x9b9ce5b74b9bab5121612ef6b64920a8d453cbf311096a423eef9702747e868a

Day root

0xf43e8dcc3d451a4788b26be904c55e8c4c0fa75c9666796c51db38d37e2c0df8

Chained

0x702d5ac508f08b0d1accf36af25822d8e5660367494edd17a642fb61e158a57a

Published

On Arc Testnet, block 69251483: 0x495162f8936e19f0039918feebe6c307f327cd6bf8c37219620b1970041fa9ae