In embodiments of an object model for domain-based content mobility, a client object model architecture (146) is configured for scalable and adaptive implementation to interface a mobile client device (128) with a media server (126) for wireless, secure download of media content (136) to the mobile client device. The client object model architecture can be implemented for domain-based control of a proxy application (144) that instantiates a media player (142) on the mobile client device, and interfaces with the media server that communicates the media content to the mobile client device. The client object model architecture also controls domain discovery of the media server, domain-based registration of the mobile client device with the media server, authentication of the mobile client device to the media server, and the secure download of the media content from the media server to the mobile client device.