Retrace tracks the performance of each Web API page in your application. Quickly identify which pages are slow, accessed the most and why! Retrace also leverages the industry standard apdex scoring algorithm to make it easy to understand how each of your Web API pages are performing. Quickly identify how many users are satisfied, frustrated, and unsatisfied. Apdex is just one of many ways to monitor your ASP.NET Web API application with Retrace.