WhoisJSON

Developer Tools

WhoisJSON — WHOIS, DNS & SSL in one API key. Free plan.

About

One API key for WHOIS lookups, DNS records, SSL validation, and domain availability. JSON or XML. 1,500+ TLDs, RDAP-ready. Start free: 1,000 requests/month, no credit card required.

Launched

March 17, 2026Week 2

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