A method and system for data usage accounting are described herein. As an example, the method can be practiced in a setting that includes both secure applications and unsecure applications. Via one of the secure applications, a request to access data can be received in which the request is intended for a content provider via a system service. The request that is intended for the content provider via the system service can be intercepted and modified, which can cause the system service to direct the request back to the secure application instead of the content provider. In addition, a connection can be established with the content provider for the request through the secure application to enable data usage accounting of data that is returned by the content provider.