Does this site have a usable llms.txt?

Who this is for

People who care whether AI can find the right pages on a site — and people who connect an AI tool to do that check.

• SaaS / B2B marketers — check your own site
• Web / SEO agencies — check client sites
• Builders using Cursor or Claude — plug TeTsuki into an agent

What you get

llms.txt is a short guide file that helps AI find the right pages on a website. TeTsuki looks at that file and returns a simple result.

• Does the file exist? Yes or no
• Is the basic shape usable? A short check (heading, links, length)
• Score 0–100 — 0 if the file is missing, higher if the shape looks usable
• Proof — the URL it fetched, the time, and a fingerprint of the content

How it works

This is not a login app with menus. It is an API gate your AI calls.

• 1. Connect — put TeTsuki’s address in your AI tool
• 2. Ask — the AI sends a domain (example: example.com)
• 3. Get an answer — TeTsuki returns the check result
• 4. Buy more when needed — pay here with a card (Stripe)

Price

Free: 3 checks per day per IP (same connection source)

After that: ¥10 per check. The only pack on sale now: 10 checks for ¥100.

• No monthly plan yet — pay only for what you use
• After payment — you get a private key. Put that key in your AI tool settings
• Free checks — no key needed. Paid checks need the key

Why TeTsuki

Anyone can open a site’s llms.txt in a browser for free. TeTsuki sells a paid HTTP API so an AI tool can do that check. A person buys checks; the AI spends them. Monitoring history is planned later. It is not included today.

• Built for AI tools — key + API, not a heavy dashboard
• Honest scope — live fetch of llms.txt today; no fake “history” claim
• Notes for AI crawlers — /llms.txt

Setup (for the person connecting the AI)

If this looks technical, send the box below to a developer. Works with Cursor, Claude, and other tools that can call an HTTP API. Free checks work without a key. Paid checks need the key from payment.

Send a POST request to:
https://tetsuki-gateway.vercel.app/api/mcp

Example body:
{
  "tool": "check_llms_txt",
  "domain": "example.com"
}

For paid checks, also send this header:
X-API-Key: tsk_your_key_here

Cursor / Claude に足すとき（MCP）:

{
  "mcpServers": {
    "tetsuki": {
      "url": "https://tetsuki-gateway.vercel.app/mcp",
      "headers": {
        "X-API-Key": "tsk_your_key_here"
      }
    }
  }
}

HTTP API（従来どおり）:

{
  "name": "tetsuki",
  "url": "https://tetsuki-gateway.vercel.app/api/mcp",
  "headers": {
    "X-API-Key": "tsk_your_key_here"
  }
}

Buy more checks

A person pays. The AI spends the checks. After payment, the next page shows your private key. Write it down so you do not forget.