When you compile the PowerServer project in the PowerBuilder IDE to generate a package for the client app, it will also generate a C# solution for the PowerServer Web APIs.
For easier distributions, you can compile the C# solution and package the PowerServer Web APIs as a distributable app in SnapDevelop IDE. Follow the instructions in this section to use the File System method to publish the Web API as a distributable app and then move the app to the server.