WhoisJson
Single API for WHOIS, DNS, SSL, and domain tools with 1,000 free monthly requests
About WhoisJson
WhoisJSON provides a unified REST API for domain intelligence, including WHOIS lookups, DNS resolution, SSL validation, domain availability checks, subdomain discovery, and monitoring. Access structured JSON or XML data across 1,500+ TLDs with a single API key, 99.9% uptime, and sub-200ms response times. Ideal for developers, cybersecurity teams, and businesses needing reliable domain data.
FAQ
Set the Authorization header to TOKEN=YOUR_API_KEY on every request. Your API key is available on your dashboard immediately after signing up.
JSON is the default format and is available on all plans. You can request XML by adding ?format=xml as a query parameter (available on Pro plans and above).
The free plan includes 1,000 API requests per month, a rate limit of 20 requests per minute, JSON response format, and 1 domain monitoring slot. The free plan never expires.
Yes, you can change your plan at any time from your dashboard. Upgrades take effect immediately, and there are no long-term contracts or commitments.
Rate limits are enforced per minute and depend on your plan: Basic (Free) has 20 requests per minute, Pro has 40, Ultra has 60, and Mega has 80-300.
Domain Monitoring watches your tracked domains and alerts you when it detects WHOIS data changes, DNS record modifications, domain expiration approaching, and SSL certificate expiration warnings.
Yes, WhoisJson fully supports the RDAP protocol and complies with GDPR requirements. All data handling adheres to official registry channels and privacy regulations.
Since 2018, ICANN's Temporary Specification for gTLD Registration Data and GDPR regulations require registrars to redact personal information from public WHOIS records. This is standard behavior and applies to all WHOIS services worldwide.
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