An AS ABAP acts as an OAuth 2.0 server and offers web-based services to OAuth 2.0 clients.
OAuth 2.0 is available for OData services that are integrated with OAuth 2.0 runtime.
SAP supports OAuth 2.0 in the context with OData-enabled RESTful services.
AS ABAP supports authentication and authorization for server-to-server communication based on OAuth 2.0.
SAP supports OAuth 2.0 with a number of different flows (see the related link).