zSpace Core SDK (Native C API)
The zSpace Core SDK is a native C API (documented as native_sdk_4.0) that lets an application drive a zSpace display: it loads the SDK runtime, detects connected peripherals, and exposes fourteen API modules covering displays, stereo buffers and viewports, coordinate spaces, the stereo frustum, tracker devices and tracker targets, target buttons, LEDs, vibration and tap, tracker events, and mouse emulation. A Unity plugin wraps the same surface. It is a device/runtime SDK, not a web service.