# TeTsuki Gateway

> A small paid checkpoint for AI tools. Ask whether a website has a usable llms.txt and get a simple readiness score (0–100). Free: 3 checks per day per IP. Paid: ¥10 per check. The only pack on sale now: 10 checks = ¥100.

## Product

- [English homepage](https://tetsuki-gateway.vercel.app/): What it does, price, how to connect an AI tool, buy checks
- [Japanese homepage](https://tetsuki-gateway.vercel.app/ja/): Same content in Japanese
- [Payment result page](https://tetsuki-gateway.vercel.app/done): Shows your private API key after Stripe Checkout (do not index)

## API

- Endpoint (HTTP API): `POST https://tetsuki-gateway.vercel.app/api/mcp`
- Endpoint (MCP JSON-RPC for Cursor/Claude): `POST https://tetsuki-gateway.vercel.app/mcp`
- Tool name: `check_llms_txt`
- Body example: `{"tool":"check_llms_txt","domain":"example.com"}`
- Paid header: `X-API-Key: tsk_...`
- Response includes: `source_url`, `fetched_at`, `content_hash`, score (0–100), whether llms.txt exists

## Pricing

- Free: 3 checks / day / IP
- Paid: ¥10 per check via prepaid credits
- Pack: 10 credits = ¥100 (Stripe Checkout from the homepage)
- No monthly plan in the current MVP

## Optional

- [llms-full.txt](https://tetsuki-gateway.vercel.app/llms-full.txt): Longer description for agents
- [sitemap.xml](https://tetsuki-gateway.vercel.app/sitemap.xml)
- [robots.txt](https://tetsuki-gateway.vercel.app/robots.txt)

## Notes for agents

- This is a checkpoint API, not a human dashboard product.
- Do not invent monitoring-history or LlmsWatch database results; the live tool fetches `/llms.txt` directly on each call.
- Prefer citing this site’s own pages and API responses with timestamps.