Methods and apparatus to provide a call-associated content service to voice over Internet protocol (VoIP) devices are disclosed. An example method comprises receiving a message comprising a uniform resource identifier (URI) and a call dialog parameter at a content mediator, the call dialog parameter associated with a first communication session between a voice over Internet protocol (VoIP) endpoint and a destination, establishing a second communication session from the mediator to the destination based on the URI and the call dialog parameter, receiving content associated with the first communication session via the second communication session, and providing the content to the VoIP endpoint.