Find website type based on the domain name

I want to find the type, tags of the website given the domain name.

For eg,

www.google.com => Search
www.instragram.com => social
www.facebook.com => social
www.linkedin.com => social, professional network

Basically, I want to cluster websites based on type, tags when provided with the domain address.

This website does exactly what I want but I am looking for something that is API based.

Is there any Web API available for this?