LinkPreflight

Is this URL safe, alive, and what is it? One call, built for AI agents.

Try it

curl "https://linkpreflight.dev/v1/preflight?url=example.com"

MCP

Remote MCP server (Streamable HTTP): https://linkpreflight.dev/mcp. Tool: preflight(url).

{"mcpServers":{"linkpreflight":{"url":"https://linkpreflight.dev/mcp"}}}

What you get

• HTTP status, full redirect chain, final URL
• Dead link (DNS, refused, timeout, 404/410/5xx) and parked-domain detection
• Content-Type and Content-Length
• Whether /llms.txt exists
• Phishing listing (OpenPhish public feed) and risk heuristics

No page content is extracted or stored. Private and internal addresses are refused.

Pricing & API keys

Free: 200 checks/day per IP, no key needed. Need more? A 25,000-check pack costs $10 (prepaid, never expires within 12 months). After checkout you get an API key (lp_…). Send it on every request:

curl -H "Authorization: Bearer lp_YOUR_KEY" "https://linkpreflight.dev/v1/preflight?url=example.com"

MCP clients send the same header to /mcp. When you go over the free limit, the API answers with HTTP 429 and a purchase link. A bad key returns 401, and an empty key returns 402.