What is the API that posts to all social networks

Question

I was told of a service, that for a fee gives you access to an API that posts to all social networks (facebook, twitter, linkedin) etc. I was hoping someone knows who it is because I can not remember.

Answer 1

Look for projects like: OpenSocial http://code.google.com/intl/pl/apis/opensocial/

Answer 2

I am using http://www.addtoany.com/, but there are others like this: Google e.g. "AddToAny comparison".

These are not really API's. They are services and you add JavaScript to your web page that then uses these services. So it is not really what you asked... But they are the easiest way to let a web user to post your page on many different social media sites, so I thought it just might be what you want.