A computer system for scheduling downloads based on metadata in a client-server topology. A server receives from a client application a request for scheduling a download of a file, wherein the request for scheduling the download of the file comprises a requirement of a time period for downloading the file. The server fetches information from one or more metadata sources. The server determines an optimal time for downloading the file, based on the requirement of the time period and information from one or more metadata sources. The server sends a response with the optimal time and information for downloading the file. The server receives from the client a request for downloading the file at the optimal time. The server serves, at the optimal time, the file to the client application.