No general API guide exists at this moment. Below are some links that will get you on your way. For information about the API itself, refer to the API Reference Guides.
Core API Guides
API Guides for Specific Features
- AutoPinger: automated peer presence checking (C++ only)
- Observer: automated interface-based discovery, session
- Property Caching: automated caching of property values for reduced network traffic and improved application responsiveness. (C++/C/Java/Objective-C)