A server receives a first hypertext transfer protocol (HTTP) from a client device requesting for content associated with a webpage. The server retrieves a plurality of cache keys associated with respective sets of application metadata identified in the first HTTP request from an application metadata database and transmits the cache keys to the client device. The server receives a second HTTP request from the client device identifying one or more cache keys that are not stored in a local HTTP cache of the client device. The server device retrieves the sets of application metadata corresponding to the missing cache keys from the application metadata database and transmits the application metadata to the client device.