Registration, DNS, subdomains and IP reputation all come from the same connection, and both WHOIS and DNS carry history — so "who owns this and what changed" is answerable without stitching together separate lookup sites.
The WhoisFreaks API exposed as fourteen tools covering four areas: domain and IP registration records, DNS both current and historical, IP intelligence, and domain discovery. It runs as a container or from a Java build.
- Live WHOIS for any domain — registrar, registrant, key dates and nameservers — plus the full ownership history as a timeline
- Reverse WHOIS: every domain registered under an email address, keyword, owner name or company
- WHOIS for an IPv4 or IPv6 address, and for an Autonomous System Number
- DNS records live (A, AAAA, MX, NS, CNAME, SOA, TXT, SPF, or all at once), historically with a change timeline, and in reverse from an IP or nameserver
- IP intelligence: country, city, region, ISP and coordinates, alongside VPN, proxy, Tor-exit, bot and threat signals
- Domain availability with suggestions, subdomain enumeration, domain discovery and SSL certificate lookup
A WhoisFreaks API key. Then either Docker, which is the route the authors recommend and which needs nothing else installed, or a Java toolchain and Maven to build from source. It connects over stdio locally, or over HTTP and SSE when it runs on a remote machine.
One command plus a key — docker run -d -p 3100:3100 -e WHOISFREAKS_API_KEY=your-key whoisfreaks/mcp-server:latest, then supply credentials