PositionMonitor is an automatic page rank monitoring system. Users input their websiteâ€™s URL and search keyword, and PositionMonitor will check its Google, Bing, and Yahoo ranks everyday. Over time, it will also graph the siteâ€™s movement. The API exposes the entirety of PositionMonitorâ€™s functionality with fees for some higher level services such as research and webshots. It is a RESTful protocol that returns JSON results.