whois

Self-hosted WHOIS/RDAP API and MCP server for domains, IPs, CIDRs, and ASNs

Servicefreeglobal

whois is a self-hosted Golang tool that looks up WHOIS information for any publicly queryable domain TLD, plus IPv4/IPv6 addresses and ASNs, exposed as both a REST API and an MCP server. In line with ICANN and GDPR requirements it withholds owner contact details, giving developers a compliant, self-hosted alternative to third-party WHOIS APIs.

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Full match profile

Behind the summary, Matchbox keeps a richer profile of whois - the signals our matcher actually reads to decide when to surface it. It stays private; claim the listing to see and control it.

Problem & pain-point mapping
Who we surface it to (audience fit)
What it's a strong alternative to
Trust & credibility signals

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