PVD network protocol

Hi, probably the short answer will be, it’s undisclosed and propietary ;)
Nevertheless, is there any documentation regarding PhysX Visual Debugger network protocol available ?

Hmmm. It’s not undisclosed and proprietary because it’s amazingly super-efficient, top-secret code. It’s undisclosed and proprietary because it would be difficult to support at that level. What are you trying to do? You should be able to extend PVD support into your applicaton using the binary API, I think, although that might require a source license.