# API Reference

- [Retrieve All Objects](/reference/backend-api/api-reference/retrieve-all-objects.md)
- [Query Objects](/reference/backend-api/api-reference/querying-objects.md)
- [Sort Results](/reference/backend-api/api-reference/sorting-results.md)
- [Limit and Skip](/reference/backend-api/api-reference/limiting-and-skipping.md)
- [Count Objects](/reference/backend-api/api-reference/counting-objects.md)
- [Create a New Object](/reference/backend-api/api-reference/create-a-new-object.md)
- [Retrieve a Single Object](/reference/backend-api/api-reference/retrieve-a-single-object.md)
- [Update a Single Object](/reference/backend-api/api-reference/update-a-single-object.md)
- [Delete a Single Object](/reference/backend-api/api-reference/delete-a-single-object.md)
- [Batch Operations (v4 API)](/reference/backend-api/api-reference/batch-operations-v4-api.md)
- [Oplog API](/reference/backend-api/api-reference/oplog-api.md)
- [Retrieve the App Data Model](/reference/backend-api/api-reference/retrieve-app-data-model.md)
- [Manage App Users and Sessions](/reference/backend-api/api-reference/manage-app-users-and-sessions.md)
- [Field Representation](/reference/backend-api/api-reference/field-representation.md)
- [Error Responses](/reference/backend-api/api-reference/error-responses.md)