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
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