WhoAPI offers 6 different APIs, start with our Whois API now!

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6 Different APIs

Whois API • Domain Availability API • Domain Score API • Email Score API • IP Blacklist API • SSL API

Whois API

WHOIS API

Delivers domain information for hundreds of millions domain names, across hundreds domains registrars and domain extensions

Screenshot API

Email Score API

Our proprietary algorithm ranks email addresses from 0 to 100. Check if the email is temporary. Great for sales!

Past clients include

Internet Entrepreneurs

All it takes is one great idea. They don’t come very often, but when they do, it takes someone with great vision to see the road ahead. A phone would still be used only for calls, a watch for telling the time and working from home would be impossible. What’s your big idea? Learn what others are building with our Whois API.

What can I build?

Developers using Whois API

Whatever good things we build, end up building us. So why not build something outstanding? Why not build something so difficult that in the process we become great developers? What are you going to build next? With our APIs there’s no stopping us! Make the first step and learn how you can build something with our Whois API.

Whois API

Serving Clients Around the World

We use WhoAPI Email Blacklist API as an integral part of our automated compliance system. This system enables us to identify potential risks to our network.”
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Dan Stevens CEO at Kickbox.com
We use WhoAPI Whois API to identify and generate indicators of compromise for further investigation. The information they provide are an essential datapoint.
Jacques Erasmus King Inc.
For a few years now, we have been using the features of WhoAPI screenshot API successfully. With the new update even more efficiently.
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Bruno Rouget Belgian Entertainment
WhoAPI provides a tremendously valuable service – machine-readable WHOIS data! We’re using it for automatic checks of domain squatting around our trademarks.
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Oliver Keyes Wikimedia
I am always on a lookout for obscure APIs and want to get my hands on them before everybody else. Same with WhoAPI, only I used the heck out of them!
Harper Reed, Modest Inc headshot
Harper Reed Modest Inc.

What others are saying about us

Fixthephoto.com

I like the speed of the provided API and the quality of its results. Besides, I was pleased by the fact that I was able to access multiple tools at once, which allowed me to reduce my expenses.

Review by Kate Gross

Webmaster.Ninja

At Webmaster.Ninja we do not download the resulting thumbnails. We just use the direct links to images provided by the API. This is possible because WhoAPI stores images for 30 days and we update the thumbnails much more frequently.

Read the review

Groundbreaking

Get ready for
astonishment

Over the last decade, we’ve conducted several groundbreaking research, interviews and written several articles in the web hosting industry. Now we are taking this one step further.

WhoAPI Research
Whoapi Research
Whoapi -Domain owner manual

Domain Owner Manual

Domain Disclosure:
Dirty Dozen

Learn about the impact of domain names on your business. These domain name fundamentals, case studies, groundbreaking research and twelve unavoidable conclusions could save you thousands of dollars.

Download White Paper