The Administration API is a set of operations that allows you to implement administrator-only features such as project management, content type creation, and so on. These operations are mostly used for building custom administration portals or for automation.
Using Administration API operations usually requires master key authentication and should therefore be restricted to trusted services. Never use the Administration API from client devices as this seriously compromises your app's security.
These are the resources that you can manage using the Administration API. Operations that are not implemented in the .NET SDK can be requested as RESTful calls. Go to the RESTful API documentation for further information.