Determine the category of any domain name on the go using our user-friendly GUI tool. The lookup result is shareable and includes a confidence score for complete transparency.
Scale the number of simultaneous queries with Website Categorization API and enable security and business systems to accurately and quickly classify websites.
Get early access to our up-to-date website categorization database.
Rely on advanced ML- and NLP-powered algorithms to enable the precise classification of any domain name.
Our tools perform live queries, so all data you receive is fresh and relevant.
Our web categorization intelligence is consistent, well-parsed, and easily accessible across consumption models.
“As part of my research into establishing resilience and security properties within the domain name infrastructure of the broader Internet, I was pleased to use the WhoisXML API Website Categorization service to identify the business categories of affected infrastructure. Integrating the APIs into my research workflow was seamless, thanks to the clear and comprehensive documentation available on their website. Within minutes, I was able to begin classifying websites and gain deeper insights into the types of businesses impacted by resilience gaps and security-related incidents.”
“WhoisXML API’s Website Categorization API helped me save time. If I did not use it, I would still be categorizing domains manually. It also improved the study’s accuracy, as the API had well-defined categories, and the output is precise and relevant.”
“The website intelligence is easy to set up and returns everything we need. One reason for this is the documentation of the API, which is well-written and very detailed.”
“Thanks to well-structured and clear API documentation provided by WhoisXML API, we were able to integrate the solution seamlessly into our system with minimal technical challenges.”
“With other APIs, there’s a tendency for requests to fail. But I didn’t notice that with Website Categorization API. I noticed that whenever a request was made, the website was always categorized.”
“I used WHOIS API and Website Categorization API. Both tools are simple and straightforward to use. Some API providers have extra bells and whistles that they force you to use, but WhoisXML API is really easy to work with. It’s stable, and I can trust that it’s not going to flatline later.”
















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