[bediger4000]

I've done it several times, with different RPC systems.

DCE was the hardest and least flexible. gRPC was the easiest and most flexible. Sun's ONC RPC was easier than DCE, but only a little.

If you have a case where a function call would work locally, gRPC will be better than REST because it forces users to strongly type their arguments rather than stringly type, as REST or XMLRPC allows. There's just less places for semantic arguments to happen. You can pass data structures in a lot of RPC systems, which can make a difference.