Keel

Exposes 14 network diagnostic tools through MCP, covering the essentials you'd normally piece together from ping, dig, nmap, and openssl. You get TCP pings with latency stats, traceroute, DNS lookups across record types, port scanning with rate limiting, SSL certificate inspection, WHOIS queries, and HTTP checks with timing breakdowns. Also includes subnet discovery (RFC 1918 only), DNS propagation testing across public resolvers, and a speed test. Built with SSRF protection that blocks private IPs and cloud metadata endpoints, plus input validation that strips shell metacharacters before hitting subprocesses. Useful when you need an AI assistant to troubleshoot connectivity, verify DNS changes, or audit certificate expiry without leaving the conversation.