Evidence row 771894

What was observed

{
  "count": 3,
  "tools": [
    {
      "description": "Hosts a file: upload up to 10 MB as base64 with its content type and get back a public download URL that serves the bytes with that content type for 1 to 168 hours (default 24). Downloads are free, readable at once where uploaded and everywhere within about a minute. Executables are refused; HTML and SVG are served as attachments. A failed upload is not charged. Price: $0.01 per call in USDC (x402).",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "contentType": {
            "description": "MIME type the file is served with, e.g. image/png or application/pdf. Executable types are refused; text/html and image/svg+xml are served as attachments.",
            "maxLength": 128,
            "pattern": "^[A-Za-z0-9!#$&^_.+-]+\\/[A-Za-z0-9!#$&^_.+-]+",
            "type": "string"
          },
          "data": {
            "description": "The file, base64 (standard or URL-safe alphabet). Up to 10485760 bytes decoded.",
            "minLength": 1,
            "type": "string"
          },
          "filename": {
            "description": "Suggested download name. Never used as the storage key.",
            "maxLength": 128,
            "minLength": 1,
            "type": "string"
          },
          "ttlHours": {
            "description": "Hours the download URL keeps working, default 24.",
            "maximum": 168,
            "minimum": 1,
            "type": "integer"
          }
        },
        "required": [
          "data",
          "contentType"
        ],
        "type": "object"
      },
      "name": "host_file"
    },
    {
      "description": "Renders a public web page in a real headless browser (JavaScript runs, redirects are followed) and returns it as clean markdown, a PNG screenshot or a PDF. One call, one payment, no account. A render that fails is not charged. Price: $0.01 per call in USDC (x402).",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "format": {
            "default": "markdown",
            "description": "markdown: the page's main content as text. screenshot: a PNG image. pdf: a PDF document.",
            "enum": [
              "markdown",
              "screenshot",
              "pdf"
            ],
            "type": "string"
          },
          "fullPage": {
            "description": "screenshot: capture the whole page, up to 8000px tall.",
            "type": "boolean"
          },
          "height": {
            "description": "Viewport height in px, default 800.",
            "maximum": 1920,
            "minimum": 320,
            "type": "integer"
          },
          "pdfFormat": {
            "description": "pdf: paper size, default A4.",
            "enum": [
              "A4",
              "Letter"
            ],
            "type": "string"
          },
          "selector": {
            "description": "CSS selector. markdown: convert only that element. screenshot: capture only that element.",
            "maxLength": 256,
            "type": "string"
          },
          "timeoutMs": {
            "description": "Navigation timeout, default 15000.",
            "maximum": 25000,
            "minimum": 1000,
            "type": "integer"
          },
          "url": {
            "description": "Public http(s) page to render. Private, local and cloud-metadata addresses are refused.",
            "format": "uri",
            "type": "string"
          },
          "waitForSelector": {
            "description": "Wait until this CSS selector exists before capturing.",
            "maxLength": 256,
            "type": "string"
          },
          "waitUntil": {
            "description": "When the page counts as loaded, default networkidle2.",
            "enum": [
              "load",
              "domcontentloaded",
              "networkidle0",
              "networkidle2"
            ],
            "type": "string"
          },
          "width": {
            "description": "Viewport width in px, default 1280.",
            "maximum": 1920,
            "minimum": 320,
            "type": "integer"
          }
        },
        "required": [
          "url"
        ],
        "type": "object"
      },
      "name": "render_page"
    },
    {
      "description": "Schedules a delayed HTTP callback: give a public URL, an optional JSON body, optional headers and a delay of 60 seconds to 7 days (or an absolute time), and the URL is called at that time (POST when a body was given, otherwise GET), with one retry and a 10-second timeout. The answer carries a free status URL that reports whether it fired and what the callee answered. A request that is refused is not charged. Price: $0.005 per call in USDC (x402).",
      "inputSchema": {
        "$schema": "http://json-schema.org/draft-07/schema#",
        "additionalProperties": false,
        "properties": {
          "at": {
            "description": "Absolute time with a timezone, e.g. 2026-10-28T15:00:00Z, 60 seconds to 7 days ahead. Give this or delaySeconds, not both.",
            "type": "string"
          },
          "body": {
            "description": "Any JSON value. Present: the callback is a POST with this as its JSON body (up to 65536 bytes). Absent: a GET."
          },
          "delaySeconds": {
            "description": "Seconds from now, 60 to 604800. Give this or at, not both.",
            "maximum": 604800,
            "minimum": 60,
            "type": "integer"
          },
          "headers": {
            "additionalProperties": {
              "type": "string"
            },
            "description": "Extra request headers, up to 16, printable ASCII values up to 1024 characters. host, content-length and connection-level headers are refused.",
            "type": "object"
          },
          "url": {
            "description": "Public http(s) URL to call. Private, local and cloud-metadata addresses are refused, when scheduled and again when fired. Redirects are reported, not followed.",
            "format": "uri",
            "type": "string"
          }
        },
        "required": [
          "url"
        ],
        "type": "object"
      },
      "name": "schedule_callback"
    }
  ]
}

What the leaf hashes

{"body":"80415cc34df45f0da951af523ce8eb27640c61a7973f20e19cac8d796c9cb886","id":771894,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793191307287367,"prev":null,"subject":"8d089b92-dd12-4195-b375-daec5136ff70","subject_kind":"endpoint"}

Proof

Fold these into the leaf in order, hashing each sorted pair with keccak256, to reach the root of 2026-10-28 (231336 rows).

1. 0x458ab2ec2937ebee0c9d0bc8e990114ce0c8391f1f8f4587b61447614066591a
2. 0x74a8dab0a359a0bd3788a62128254a4d7c41002a51161cbf6ef7dca9aa9a42a9
3. 0xfec3ccd15936f657469412da92d2994f25d10b0926f4e5539640bfadadf79af7
4. 0x59eb05c5a8ccff722589a4b159db9048ba1e1c00116fdc787ab589203173e69f
5. 0x1f8de9e65cf8593b7042119ad4a633f8d11584c56b525bea43e7782123ec5e13
6. 0xffdc12acee7fa72d6c1872de5a8e0c0c4b495da9718b6e62cfb1b0d734a62e59
7. 0x09f5f3712504a2fa15f94b0f0ea0b3c6460fa4897b172bd7eb6e9acd6cd7f4da
8. 0x7b2358a14d99a440aea8d31752238805867805bca6391648b9c2bc4698c303b6
9. 0x6f36b3ea2fdc71b51253fc62660b57102791df597444b68bbdcc0253f5ae9695
10. 0xe90cdec8b36b8336e33291a66bcce352f3a754952cdc986f7b5520e164d5ec60
11. 0x1de4553f4f49546b09b5e92560b125baadc68729ff7d85ff866a71bd081a6239
12. 0xa42f0d8f627149b7cdfb8ff4d65d4c18f851578f3c6cd50a33767f225a232830
13. 0x61139ad7d606f7313043f7df1dce650b88fec9b3f4115099388cfb12e3b2c33d
14. 0xb8468b110fdd4b1ba83cf25249a313b6361839956c4e0f61b3f3edfce5fe58d8
15. 0x91690f98682e078d41b8b72edeaea70473545a876fc3baa645fc988225096386
16. 0xaeb1503e5d0d358b256ba97a10178c357ddb8f55cc961925ccf0458aae5ebcae
17. 0xf078ea7d84d98dbeffed23d8e67b36751e60464ffd4cfdc005e0aa6f8cb9b459
18. 0xe027395fafb7fc41921c42ca0542524ea22204cbd5908b70b27f3d5fb26f5d0f

Day root

0x2c19037464cc4c493624565f01775d6446fc78eaa118fc6865bfe2bfca9ff78e

Chained

0xd1d7dee8322ceff8f4c8d83aa1fe4a4466825c2af1c97dbde3d35db61234f7be

Published

On Arc Testnet, block 69584042: 0x8bae2b1d097834c8b458513862d70d29ee807e98dc2e863b27250131c15b35ae