Redirect Function

We are looking for a replacement for the Helix streaming server for our platform. The evoStream product has the basic required functionality. However there is one feature in Helix, we have not found a solution to in your product, without us writing our own custom API. Helix has a redirect function. This allows the application to connect to an edge server with a URL like /request.mp4?sessID=1234&svID=2342&….. With the redirect function, Helix posts this URL to an API Gateway (on another server). That server validates the request. If not valid, it returns an access denied. If valid, it returns a URL to the server with the track to be played, the required format (rtsp,http, iOS, etc.) and any other parameters needed (ie. previews). Do you have a finished solution for this application?