A distributed system architecture is described for control of a Set Top Box (STB). The architecture employs server software implemented as JSON middleware, and provided on the STB 32 as a local server, as well as on a Tooling Device 34 and a Control Application 36. The distributed system facilitates communication with the STB over a data network such as the internet. A remote client device running a browser 30 can interact with the STB 32 to access STB functionality 32.