In one embodiment, a social networking system transmits a client proxy application to a client device in order to export data from a third-party site that has instituted IP address blocking or rate limiting. In particular embodiments, the proxy application multiplexes a plurality of web responses from the third-party server over a single socket communication with a proxy server. In particular embodiments, the proxy application obtains data from the third-party service and relays it via the proxy server to the social networking system.