Techniques for facilitating communication between an application and a server are provided. An intermediary sits between an application and a server. The intermediary intercepts and responds to communications on behalf of the intended recipient of the communication. In one technique, the intermediary relays a request to the server and receives a response from the server. The intermediary updates a local store with data that is implied by the protocol to which the request conforms and determined based on the request. In another technique, the intermediary intercepts a request to access data on the server. The intermediary determines, based on characteristics of a computing device, that the request should be responded to using data that is available in a local store. The intermediary responds to the request using that data.