Programmatic interfaces for controlling the appearance or behavior of the Blocks editor or a Display Spot, for communicating with Blocks from custom web applications and for uploading images and other files to a Blocks server.

• URL Query parameters can be used to manipulate the behaviour of both the editor and a display spot.
• Javascript APIs for communicating with Blocks from web pages, either used as part of a block (using a Web Block) or running as a separate web page (which may still be hosted on your Blocks server).
• File Upload APIs for uploading files, for example images to Blocks.
• Raw TCP socket API for communicating with Blocks from other control systems or programs capable of accessing TCP sockets.