# System API

API Reference for System

> **Terminology Update:** We have streamlined our naming conventions to improve clarity. The term **System** has been replaced with **System**. To avoid breaking changes the APIs still make use of the old term. Both terms refer to the same underlying functionality.

## API Endpoints

- [UpdateZitadelProvider](/content/docs/reference/api/admin/zitadel.admin.v1.AdminService.UpdateZitadelProvider): Change an existing Zitadel identity provider on the instance
- [AddInstance](/content/docs/reference/api/system/zitadel.system.v1.SystemService.AddInstance): Deprecated: Use CreateInstance instead. Creates a new instance with all needed setup data. This might take some time.

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