Runtime documentation generationg
ApiDocu can show you api documentation for current route, if there is any. Just visit the api url and add a ?__apiDocu parameter in you address bar.
PUT, POST, DELETE routes
But you cat match only routes with GET method when you are comming through browser window. Route method can by changed by ?__apiRouteMethod query parameter. To visit PUT route api documentation you have to write something like that: /users/10?__apiRouteMethod=DELETE&__apiDocu. Here is an example: /api-router/api/users/8?__apiRouteMethod=PUT&__apiDocu.
Presenter code is the same as the one in overview page.