A system is configured to receive a network resource request from a user device configured with a browsing application, wherein the request includes identification data associated with the user device. The system transmits, to a network resource provider, a request for the network resource, wherein the request transmitted to the network resource provider excludes identification data included in the request received from the user device. The system receives from the network resource provider a response, including a document comprising a field configured to receive payment information for an item purchase. The system receives from the browsing application an indication that an anonymous payment instrument, associated with a first entity different than the user, is to be used to purchase a first item at a first price. The system causes information regarding the anonymous payment instrument to be provided to the network resource provider.