Evidence row 541686

What was observed

{
  "count": 3,
  "tools": [
    {
      "description": "Build a hosted Open Graph card from a public page (title, description, favicon, theme-color) and return https://ogstamp.com/i/{id}.png. Requires api_key. One credit. Does not return a free hotlink.",
      "inputSchema": {
        "properties": {
          "api_key": {
            "description": "ogs_… key from https://ogstamp.com/pricing/. Required. One credit is spent.",
            "type": "string"
          },
          "font": {
            "enum": [
              "inter",
              "manrope",
              "playfair",
              "space",
              "dm",
              "lora",
              "mono",
              "figtree",
              "bitter"
            ],
            "type": "string"
          },
          "layout": {
            "enum": [
              "classic",
              "center",
              "split",
              "minimal",
              "quote",
              "terminal"
            ],
            "type": "string"
          },
          "size": {
            "enum": [
              "og",
              "square",
              "linkedin",
              "story",
              "wide"
            ],
            "type": "string"
          },
          "theme": {
            "enum": [
              "midnight",
              "paper",
              "forest",
              "coral",
              "slate"
            ],
            "type": "string"
          },
          "url": {
            "description": "HTTPS URL of the page to build a card for",
            "type": "string"
          }
        },
        "required": [
          "url",
          "api_key"
        ],
        "type": "object"
      },
      "name": "og_image_from_url"
    },
    {
      "description": "Return OG Stamp credit packs. Credits never expire. PayPal one-time, not a subscription.",
      "inputSchema": {
        "properties": {},
        "type": "object"
      },
      "name": "og_pricing"
    },
    {
      "description": "Build a hosted Open Graph PNG and return a stable https://ogstamp.com/i/{id}.png URL for og:image. Requires api_key (ogs_… from https://ogstamp.com/pricing/). One credit per image. Does not return a free hotlink.",
      "inputSchema": {
        "properties": {
          "accent": {
            "description": "Accent bar / badge hex",
            "type": "string"
          },
          "api_key": {
            "description": "ogs_… key from https://ogstamp.com/pricing/. Required. One credit is spent.",
            "type": "string"
          },
          "badge": {
            "description": "Optional small label",
            "type": "string"
          },
          "bg": {
            "description": "Background hex, e.g. #0b1220",
            "type": "string"
          },
          "fg": {
            "description": "Text hex",
            "type": "string"
          },
          "font": {
            "description": "Typeface for brand fit",
            "enum": [
              "inter",
              "manrope",
              "playfair",
              "space",
              "dm",
              "lora",
              "mono",
              "figtree",
              "bitter"
            ],
            "type": "string"
          },
          "layout": {
            "description": "Card composition",
            "enum": [
              "classic",
              "center",
              "split",
              "minimal",
              "quote",
              "terminal"
            ],
            "type": "string"
          },
          "logo_url": {
            "description": "HTTPS URL of a square logo/PNG",
            "type": "string"
          },
          "site": {
            "description": "Small site/domain label on the card",
            "type": "string"
          },
          "size": {
            "description": "Output dimensions preset",
            "enum": [
              "og",
              "square",
              "linkedin",
              "story",
              "wide"
            ],
            "type": "string"
          },
          "subtitle": {
            "description": "Optional second line",
            "type": "string"
          },
          "theme": {
            "description": "Base theme; override with bg/fg/accent hex",
            "enum": [
              "midnight",
              "paper",
              "forest",
              "coral",
              "slate"
            ],
            "type": "string"
          },
          "title": {
            "description": "Main headline on the card",
            "type": "string"
          }
        },
        "required": [
          "title",
          "api_key"
        ],
        "type": "object"
      },
      "name": "render_og_image"
    }
  ]
}

What the leaf hashes

{"body":"3c5b20c4bcbbd3013f8d16a895e9994f31c354c20e5d8cb1c8517eac8d059be6","id":541686,"kind":"mcp.tools","method":"probe.mcp/1","observed_us":1793130491727222,"prev":null,"subject":"b25256ab-3756-4a29-b2b0-15f6d78ecfb8","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. 0x69e99d7994c297a259b2a1fe713ace2d9983c69228cc04e5c794ef5b8ecf33c6
2. 0xd089fa7dde3d39d82f474109db16a8ff38c964db6362f9e4e91bfbfe19fe7bdc
3. 0x8787b114d28bea482b61ef111af5a98adc26bfa7d929a2ee77005f4ceda112ce
4. 0xdb1eb83ad045f25668c01689b3476bb2a5498636c173bf8ac162bf1f3ab52d23
5. 0x2f9e829f53111f23fb778e17297cd016930a328805297fed28d0cfd8fa71c402
6. 0x474581f92d4884f38c928ddf05d3598d70bae28fb7989eed7dd9676f2edbbe4d
7. 0xc169538b72e2ea0b375a08e85972d06cf8e298d99c75951ca92fa742ab16d611
8. 0x933591262062e4a65b6f8ac89817b99e2ab5f4f426ebe2cfb698cc5f63ad0aa2
9. 0xa60b21493435923af4effba756d5b8948c541660dc04911aadb5d45e1a741799
10. 0x8292b0c4302eab317dc9442deb7c510d6a5800a9f644e4859ca59b9b2b323e8a
11. 0xf948df558d360ef6260367a5acb11bce86c964cb5608d9fbd474976a57db8d7b
12. 0x1907258a29a881c6f59707e890e9f73f7aff1ace32101f20e208f76e9fac9a60
13. 0x927616fada4e04588c09f6e02e8f6e3a1351bac8355e394da3bd0bf249a5c503
14. 0x3c5462812bd2f841e3d7deefc01555f18262fe5e0d5a7eb155330b7a7cb0388e
15. 0x6f00f0da417f4126951ba8ba9b7962c847e91f5c61364ad9ad47e5f979698a60
16. 0x23cf9bb4337ee8be7fcae368fd69d24c62c11fb45882127b4cd919bb96a19996
17. 0x0e01aa9525097570a6edaf32bfc959de57bf5c24317cf10c0716affea85ca60d
18. 0xa20d48798a34aba12eb9c7297722982d910f06c148f5e27ac59307422964a585
19. 0x9fc354c0ea3efc3f1b6548bb77ea902a50f2c9647647ea61592efce2bd795699

Day root

0xdd77e5e99da32c3f154180d63e3c3e6fe11e896a2c6896412ef6b5c4bcf7e795

Chained

0x23bb4dfd09f55c15ac3962f53578e02c6114d5bfd9bb451cf8794fb6e2817ef4

Published

On Arc Testnet, block 69414147: 0xb2ebd83aafeb765a0ce66e76aefb133ed06606c98038fd56191e2bcd1dcb77b4