title: Web API ActionFilter modify returned value
body: <p>I have a Web API application that I need to get ahold of the return value of some of the API endpoints via an ActionFilter's OnActionExecuted method</p>
  
  <p>I'm using a custom attribute to identify the endpoints that have data that I need to modify, but I can't seem to find the actual result object from within the HttpActionExecutedContext.</p>
  
  <p>Thanks for any help!</p>