Techniques are provided for a plug-in architecture for processing operations on a WSD DCP device. Such a device comprises a dispatcher, a plug-in handler, and one or more plug-ins. The dispatcher receives a SOAP request and determines, based on one or more operations associated with the SOAP request and a configuration file, whether one or more plug-ins need to be invoked. If one or more plug-ins need to be invoked, then the dispatcher calls the plug-in handler and passes data to the plug-in handler, which is configured to call the appropriate plug-in(s) and pass the data to the appropriate plug-in(s). The plug-in handler receives processed data from the appropriated plug-in(s) and sends the data to be processed by a lower level service, such as by a print service, a scan service, a facsimile service, or an archive service.