Siebel REST API Guide > Overview of Using the Siebel REST API >

About User Authentication

Before making REST API calls, users must request a session with the Siebel CRM server. Siebel CRM supports the following mechanisms that the client uses to authentication user credentials:

• Basic authentication over SSL
• OAuth user using OAuth 2.0. For more information about OAuth 2.0, see About Configuring OAuth 2.0 for Authentication.
• SSO, which can be either:
  • Pre-existing SSO mechanisms used for Siebel Applications or EAI
  • SAML based SSO mechanisms