I have implemented Spring Social + Spring Security as outlined in the Spring security examples (and with spring security java config). I reported couple of problems at the time (see https://jira.springsource.org/browse/SEC-2204) all of those are resolved and my security works fine. 

However, I want to change my security implementation and use RESTful authentication. Spring oauth/oauth2 (http://projects.spring.io/spring-security-oauth/) solves this problem but I can not see how Spring Social will fit into that picture? Although behind the scenes Spring social talks to Facebook/Twitter with oauth, I don&#39;t think Spring Social&#39;s signup form and other characteristics are built for a restful API.

Any examples or ideas will definitely help.

**Update on this post: (4/6/2014)**

- I have built a (PHP) site that consumes my API.
- This PHP site (let&#39;s call it the client site), uses Facebook PHP SDK to register its own users. This is a completely separate way of gathering its own members.
- However, once users are registered client site passes username, email, password, first name, and last name data along with its client_id and client secret and using OAuth2 grant type `client_credentials` authentication.
- This passed-in user data creates an user record on the main system! (main application)
- After this, each time the client site calls the main system via OAuth2 grant type password and sends `client_id`, `client_secret`, username and password, gets an &quot;Authentication token&quot; and be able to communicate with the main site with this token.

Seems like a long way to go but solves the problem of keeping the user record on the main system. I&#39;m curious if there are other ways to do this? Please advise.

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How to do rest authentication with Spring Social?