Hello Christopher
Remember that Management Plane Protection (MPP) is a subset of Control Plane Policing (CoPP). CoPP is something that is available on all Cisco devices including IOS and NX-OS devices.
Information about CoPP for NX-OS devices can be found here:
Notice the “management plane” section of the document.
Information about MPP for Catalyst devices, and in particular the 9K Catalyst series can be found here:
I hope this has been helpful!
Laz