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WhoisJSON API
whoisjson.com
Spec sheet
- Product
- WhoisJSON provides a REST API for WHOIS, DNS, SSL certificate, domain availability, email domain intelligence, subdomain discovery, and monitoring lookups.Read 7 Oct 2026 · whoisjson.com
- Intended users
- The maker describes use cases for developers, cybersecurity professionals, businesses, brand protection, domain portfolio management, and DevOps.Read 7 Oct 2026 · whoisjson.com
- Free plan
- YesRead 20 Sep 2026 · whoisjson.com
- Integrations
- Official clients are listed for PHP, Python 3.7+, and Node.js, and the MCP server is described as compatible with Claude, Cursor, and Windsurf.Read 7 Oct 2026 · whoisjson.com
- Security
- The pricing page states that all traffic is encrypted end-to-end and the service is HTTPS-only.Read 7 Oct 2026 · whoisjson.com
- Privacy
- The terms state that WhoisJSON does not sell, rent, or share personal information with third parties for marketing purposes.Read 7 Oct 2026 · whoisjson.com
- Support
- The API documentation says the support team typically responds within a few hours.Read 7 Oct 2026 · whoisjson.com
- API documentation
- YesRead 20 Sep 2026 · whoisjson.com
- Caching
- Responses are cached for a three-hour TTL, and _forceRefresh=1 bypasses the cache at a cost of two credits on most plans.Read 7 Oct 2026 · whoisjson.com
- Commercial use
- The pricing page says all plans, including Basic, allow commercial use in SaaS products, internal tools, client dashboards, and business applications.Read 7 Oct 2026 · whoisjson.com
- Coverage
- The service says it supports more than 1,500 generic and country-code TLDs and uses RDAP where supported.Read 7 Oct 2026 · whoisjson.com
- Quota behavior
- After the monthly request quota is reached, further API calls return HTTP 429 until the next billing cycle.Read 7 Oct 2026 · whoisjson.com
- Response formats
- API endpoints return JSON by default and can return XML with the format=xml parameter.Read 7 Oct 2026 · whoisjson.com
Plans and prices
Basic Free No credit card required 1,000 requests/month · 20 requests/min · 1 monitored domain Read 20 Sep 2026 · whoisjson.com
Pro $10 a month billed monthly 30,000 requests/month · 40 requests/min · 5 monitored domains Read 20 Sep 2026 · whoisjson.com
Ultra $30 a month billed monthly 150,000 requests/month · 60 requests/min · 20 monitored domains Read 20 Sep 2026 · whoisjson.com
Scale $50 a month billed monthly 1,000,000 requests/month · 100 requests/min · 30 monitored domains Read 20 Sep 2026 · whoisjson.com
Mega $80 a month billed monthly 100 requests/min · 50 monitored domains Read 20 Sep 2026 · whoisjson.com
Giga $120 a month billed monthly 200 requests/min · 100 monitored domains Read 20 Sep 2026 · whoisjson.com
Tera $200 a month billed monthly 300 requests/min · 150 monitored domains Read 20 Sep 2026 · whoisjson.com
Titan $399 a month billed monthly 600 requests/min · 500 monitored domains Read 20 Sep 2026 · whoisjson.com
Atlas $600 a month billed monthly 900 requests/min · 500 monitored domains Read 20 Sep 2026 · whoisjson.com
Basic Free 1,000 requests/month · 20 req/min · 1 monitored domain · JSON Read 7 Oct 2026 · whoisjson.com
Pro $10 a month Monthly; yearly billing costs 10 months for 12 months of access 30,000 requests/month · 40 req/min · 5 monitored domains · JSON Read 7 Oct 2026 · whoisjson.com
Ultra $30 a month Monthly; yearly billing costs 10 months for 12 months of access 150,000 requests/month · 60 req/min · 20 monitored domains · JSON Read 7 Oct 2026 · whoisjson.com
Where Specifiction places it
- API clients#29 of 387.9
