The API Explorer node allows you to explore the Commands and Queries used to do most things in in DynamicWeb.
Commands
The Commands-interface allows you to explore Commands, which are used to manipulate data on a solution by e.g. creating, deleting, or saving pages, users, etc.
You can click each Command to see the schema of the model you need to post to the command:

Queries
The Query-interface allows you to explore the queries used by the system to fetch data and e.g. display it on a screen.
You can click each query to try it out against the solution database:
