Abstract: Techniques for developing software applications that call a virtualized computing environment are described. A graphical user interface is rendered that is operable to graphically depict a representation of an input, output, and operation based on user input data. Graphical depictions of the representation of the input, output, and operation are rendered. The rendered graphical depictions are associated with related executable code operable to execute functionality implementing the input, output, and operation and call services in the virtualized computing environment.