SCIM is a standard for automating user provisioning. It is used to manage user identities across multiple systems and domains, ensuring that user data is consistent across different platforms. SCIM enables service providers to automatically retrieve and manage user identity data from an identity provider, which reduces the manual effort needed to manage user identities across different systems. SCIM uses RESTful APIs (Application Programming Interfaces) to transfer user data between systems.

What is the difference between SCIM vs. SAML?
In short - SCIM is focused on user provisioning and SAML is focused on authentication. SAML is primarily used for single sign-on (SSO) authentication between applications or systems. SAML enables users to log in once to a single system and then access multiple other systems without having to log in again. Where SCIM differs is that it is API-based, not login-based. SAML uses login events to facilitate the exchange of information between the identity provider and the service provider.