# OpenAM Administration Guide
13.1. About OAuth 2.0 Support in OpenAM

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### 13.1.1. OpenAM as OAuth 2.0 Authorization Server

OpenAM can function as an OAuth 2.0 authorization server. In this role, OpenAM authenticates resource owners and obtains their authorization in order to return access tokens to clients.

When using OpenAM as authorization server, you register clients with OpenAM by using OAuth 2.0 policy agent profiles. OpenAM supports both confidential and public clients.

OpenAM supports the four main grants for obtaining authorization described in RFC 6749: the authorization code grant, the implicit grant, the resource owner password credentials grant, and the client credentials grant. See RFC 6749 for details on the authorization grant process, and for details on how clients should make authorization requests and handle authorization responses. OpenAM also supports the SAML 2.0 Bearer Assertion Profiles for OAuth 2.0, described in the Internet-Draft.