A content capability clearing house that can act as a trusted and neutral mediator among network providers to manage rich content capabilities among multiple networks is provided. Content capabilities that can be brokered include, but are not limited to, quality of service and content screening. In an embodiment, a content capability clearing house includes a receiver that receives content capability request messages and other messages from network providers. A content capability request message includes a quality of service request and/or a subscriber profile request for use with content screening and subscriber specific advertisements. The present invention includes a series of methods for determining content capabilities for data transmission over a transaction between a content provider and a subscriber in which a content capability clearing house is used to efficiently broker and manage the capability among multiple network providers.