A system and method for effectively configuring a marketsite application integrator may include an application program running on a computer device that is coupled through a computer network to other 10 electronic entities for performing various types of electronic commercial transactions. An application integrator may be coupled to the application program for providing incoming data from a data source to the application program. The application integrator may also provide outgoing data from the application program to a data destination. The application integrator may 15 include various configurable integrator modules for selectively processing the incoming data and outgoing data in an appropriate and effective manner.