https://www.whoxy.com/
WHOIS API | WHOIS Lookup API | Domain WHOIS API
WHOIS API lets you quickly lookup a domain name's WHOIS data. You get fully parsed WHOIS fields in XML or JSON format at just $2 per 1000 domains!
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https://robowhois.com/
Whois API & Domain API
RoboWhois is a web service that provides a RESTful whois API to access whois records and domain related information with a unified, consistent interface.
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https://reverse-whois.whoisxmlapi.com/lookup
Reverse WHOIS Lookup by a domain owner’s name, etc. | WhoisXML API
Use our reverse domain lookup tool to list all domain names connected to a domain owner’s details such as a name, an email address, and more.
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https://whoisjson.com/
WhoisJSON — WHOIS, DNS, SSL & Domain Availability API | Free Plan
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...
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https://main.whoisxmlapi.com/?action=show&subject=modal&id=contactUsEnterpriseAccessModal&mc=circleid
WhoisXML API: #1 for Domain, WHOIS, IP, DNS & Threat Intelligence | WhoisXML API
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