A communications system may include an application server and at least one communications device for processing requests from one another. The communications device may process requests using an HTTP client application, for example. Furthermore, the system may also include an HTTP server for interfacing the HTTP client application with the application server. The HTTP server and the HTTP client application may format requests to be communicated therebetween via the Internet in an HTTP format, and each may provide additional state information with the HTTP formatted requests recognizable by the other for authenticating the application server and the HTTP client application to one another. Furthermore, the HTTP client application may request a first universal resource locator (URL) from the HTTP server for accepting work requests from the application server, and a second URL different from the first URL for responding to work requests from the application server.