Techniques described herein provide for an advertising processing engine service to act as an intermediary between client applications and advertising networks. The advertising processing engine service can provide an interface with which the client can interact, via an application programming interface (API) or directly through the use of a standardized language, thereby allowing client applications to receive advertisement data without the need to be customized to communicate with specific advertising networks. On the other hand, the advertising processing engine service can receive requests from clients and communicate these requests to advertising networks in the corresponding language and/or format they require.