MEGAcmd

MEGAcmd is an interactive, text console based, scriptable MEGA client. The program intends to offer all the functionality with your MEGA account via commands.

It features 2 modes of interaction: interactive (a shell to query your actions) and scriptable (a way to execute commands from a shell/a script/another program). In order to provide those 2 modes, it features one main application and several client commands. For using the interactive mode you will need to launch the main application and start writing your commands there.