# LinkPreflight

> One call that tells an AI agent whether a URL is safe, alive, and what it is, before the agent clicks, cites, or fetches it.

## API
- [GET /v1/preflight?url=URL](https://linkpreflight.dev/v1/preflight?url=example.com): JSON with verdict (ok|dead|parked|unsafe|blocked|error), status, redirects[], final_url, content_type, content_length, dead_reason, parked, llms_txt.exists, safety.listed, safety.heuristic_flags
- POST /v1/preflight with body {"url": "..."} does the same thing

## MCP
- [Remote MCP endpoint](https://linkpreflight.dev/mcp): Streamable HTTP, tool `preflight(url)`

## Limits
- Free: 200 checks/day per IP. Over the limit you get HTTP 429 with `payment_link` for a credit pack. Buy directly: https://buy.stripe.com/5kQ28reB4ar7b5Dbp76g800
- Private/internal targets are refused (verdict "blocked"). Each hop has a 6 s timeout, with at most 10 redirects.

## Legal
- [Terms](https://linkpreflight.dev/terms.html): operated by LinkPreflight