How to check if NCM supports REST operations for my device or not?

Please go to Config Automation > Device Templates > REST Device Templates and see if there is a device template available for your device. If yes, then you can perform REST operations using NCM on that particular device. For OpManager and NFA this page is available under Settings > NCM REST Device Templates.

Please note: Make sure the device's firmware version is higher than or equal to the base OS version for REST operations to work properly.