Systems and methods are provided for a Dynamic Hosted Shopping Cart. According to one embodiment, a method comprises configuring a Dynamic Hosted Shopping Cart (DHSC) at a remote server based on communications with a buyer device and at least one seller's server that hosts one or more seller websites. The method also comprises embedding in or floating a widget above the one or more seller websites in connection with the DHSC. The method further comprises dynamically updating contents of the DHSC implemented by the widget according to communicated transaction information. In addition, the method comprises offering checkout across all enabled pages of the one or more seller websites.