Since sensenet supports content type inheritance there are two ways to query items by their types.

Query by a type

The following example shows how to get items with an exact type (Car) skipping the contents with one of the inherited types.

GET https://example.com/OData.svc/Root?query=Type:Car

Query by a type and its subtypes

In most of the cases you will query by type family (by a content type and all of its inherited ones).

The response of the following example will return every content with the type Folder or any inherited type.

GET https://example.com/OData.svc/Root?query=TypeIs:Folder