I'm building my startup and I'm thinking ahead for shared use of services.

So far I want to allow people who have a user account on one app to be able to use the same user account on another app. This means I will have to build an authentication server.

I would like some opinions on how to allow an app to talk to the authentication server. Should I use curl? Should I use Python's http libs? All the code will be in Python.

All it's going to do is ask the authentication server if the person is allowed to use that app and the auth server will return a JSON user object. All authorization (roles and resources) will be app independent, so this app will not have to handle that.

Sorry if this seems a bit newbish; this is the first time I have separated authentication from the actual application.