Domain Availability | Safe and fast queries | WhoisXML API

Check domain availability with our products

Check if any domain name can be registered or not. Sign up for a user account and enjoy your first 100 queries free of charge.

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100 free API requests. No credit card required.

Our domain availability product line includes:


An immediate way to check if you can register a domain name.

Domain Availability Lookup | WhoisXML API
Domain Availability API | WhoisXML API


Domain Availability API can be integrated into existing software and offers market-leading accuracy when checking domain availability at scale via API calls. 100 complimentary queries are provided free of charge when signing up for a new account.


  • Establish whether or not domains are available to be registered in the most convenient way for you.

  • Our API results are available in both JSON and XML. Our lookup reports are straightforward and shareable.

  • Both our API and lookup versions cover an extensive selection of TLDs.

  • Our WHOIS data is updated daily and accurate for both Domain Availability Lookup and API.

Practical usage

Expand Your Domain Portfolio

Use our domain availability tools to find out at scale if domains of your interest are available for registration.

Obtain Strategic Domains Names for Your Business

Constantly check the DNS with our domain availability tools’ help to get your hands on that perfect business domain name as soon as it becomes available for registration.

Domain Availability Overview | WhoisXML API

Get 100 free API credits. No credit card required.

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