Semantic/Contextual Categorization API [closed]

Question

I'm working on a project that requires categorizing content of a given URL. Basically, I want to pass a URL to this API and it will return the category or list of categories based on its content. I think Textwise.com may have this service. Are there other similar services out there?

Answer 1

OpenCalais from Reuters is another such system.

You can also roll your own using open source systems like Gate which will allow you to avoid things like API limits but may require you to train your system appropriately.