App Services does not support all operations available in standard MongoDB tools and clients.

For information on available operators in User Functions and System Functions, see CRUD & Aggregation APIs.

For a high-level overview of App Services functionality, see Service Limitations.

App Services also does not provide support for database commands within the client SDKs and functions.

To use the limited subset of database commands provided by App Services, an Atlas connection calling the App Services wire protocol is required.

For information on available database commands, see CRUD & Aggregation APIs: Database Commands.