The Pyrus API provides implementation of core API methods in some languages:
https://github.com/simplygoodsoftware/pyrusapi-python
git clone https://github.com/simplygoodsoftware/pyrusapi-python.git
https://github.com/simplygoodsoftware/pyrusapi-csharp
git clone https://github.com/simplygoodsoftware/pyrusapi-csharp.git