WhoisJSON

Developer Tools

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

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Access WHOIS information, DNS data, SSL certificate status, and domain name availability using a single API key. Supports both JSON and XML formats. Our service covers over 1,500 top level domains and is ready for RDAP. Begin with a free plan: 1,000 requests per month, and no credit card is needed to get started.

Launched

March 17, 2026Week 2

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