WhoisJSON API

Plans and prices

Every plan, in full

On the record

API documentation

Yeswhoisjson.com · read 20 Sep 2026

Caching

Responses are cached for a three-hour TTL, and _forceRefresh=1 bypasses the cache at a cost of two credits on most plans.whoisjson.com · read 7 Oct 2026

Commercial use

The pricing page says all plans, including Basic, allow commercial use in SaaS products, internal tools, client dashboards, and business applications.whoisjson.com · read 7 Oct 2026

Coverage

The service says it supports more than 1,500 generic and country-code TLDs and uses RDAP where supported.whoisjson.com · read 7 Oct 2026

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.whoisjson.com · read 7 Oct 2026

Intended users

The maker describes use cases for developers, cybersecurity professionals, businesses, brand protection, domain portfolio management, and DevOps.whoisjson.com · read 7 Oct 2026

Privacy

The terms state that WhoisJSON does not sell, rent, or share personal information with third parties for marketing purposes.whoisjson.com · read 7 Oct 2026

Product

WhoisJSON provides a REST API for WHOIS, DNS, SSL certificate, domain availability, email domain intelligence, subdomain discovery, and monitoring lookups.whoisjson.com · read 7 Oct 2026

Quota behavior

After the monthly request quota is reached, further API calls return HTTP 429 until the next billing cycle.whoisjson.com · read 7 Oct 2026

Response formats

API endpoints return JSON by default and can return XML with the format=xml parameter.whoisjson.com · read 7 Oct 2026

Security

The pricing page states that all traffic is encrypted end-to-end and the service is HTTPS-only.whoisjson.com · read 7 Oct 2026

Support

The API documentation says the support team typically responds within a few hours.whoisjson.com · read 7 Oct 2026

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