1. A system comprising: at least one processor; and a non-transitory computer-readable medium storing executable instructions that, in response to being executed, cause the system to perform operations comprising: receiving, by a search engine of a first website, input via a user interface of a device accessing the first website, wherein the received input comprises a search query; determining item listing information of an item listed for sale on a second website based on the received input, the second website being different from the first website; causing the item listing information to be displayed on the first website on the device via the user interface; and enabling, using at least one remote application programming interface (API), the device to interact with the second website without navigating to the second website, via the user interface and the first website, regarding the item listed for sale on the second website by interacting with the item listing information being displayed on the first website to reduce an amount of navigation between websites that is performed by the user regarding the item listed for sale, the enabling the device to interact with the second website regarding the item listed for sale comprising enabling the device to complete at least one transaction-based function for the item listed for sale using at least one functionally-active graphical user interface element displayed on the first website and without navigating to the second website, the at least one transaction-based function comprising attempting to purchase the item listed for sale.