# Check API — AI Agent Readiness API (Free, No Key)

> Free API to check any URL for AI-agent readiness: llms.txt, Markdown negotiation, JSON-LD, sitemap, and crawler rules. GET one URL; POST up to 6.

Source: https://toolpantry.app/api-docs

## About

A free, keyless JSON API that scores any public URL for AI-agent readiness — the same checks as the web checker, scriptable.

## Quick answer

How do I use the AI agent readiness API? GET /api/check?url=https://example.com for a single URL, or POST /api/check with {"urls": [...]} (up to 6) for bulk. No key required; rate limited to 30 requests per minute per IP. Each result scores 0–9 with per-check details.

## Notes

Bulk requests run URLs sequentially to respect Cloudflare subrequest limits — allow a few seconds for 6 URLs. Only public http(s) URLs are accepted; private addresses and non-web schemes are rejected. Fixing the gaps is documented in the open-source kit.

## FAQ

**Is the API free?**

Yes — no key, no signup. It is rate limited to 30 requests per minute per IP to keep it polite.

**What are the limits?**

Single checks via GET, bulk via POST with up to 6 URLs per request (Cloudflare subrequest limits). Loop over batches for more.

**Can I use it commercially?**

The data describes public files of public websites. Use it freely; attribution to toolpantry.app is appreciated.

**Where is the source code?**

The checker logic, worker, and skills are open source at github.com/wu736139669/markdown-for-agents-worker (MIT).