# XR API reference

> Understand the common APIs for XR development that Unity provides.

Unity provides APIs for XR development under the `XR` namespace. Refer to the following table to understand the XR APIs:

| **Topic**                                                                           | **Description**                      |
| ----------------------------------------------------------------------------------- | ------------------------------------ |
| [XR.XRSettings](/engine/6000.3/script-reference/unityengine/xr/xrsettings.md)       | APIs for Global XR related settings. |
| [XR.XRDevice](/engine/6000.3/script-reference/unityengine/xr/xrdevice.md)           | APIs related to XR devices.          |
| [XR.InputTracking](/engine/6000.3/script-reference/unityengine/xr/inputtracking.md) | APIs for accessing XR input devices. |