How to extend list of routers?

OSM main page has a button “route” (german) which shows actually 3 different routers. Is it possible to extend this list? If yes, how it is performed? If admins only, can it be extended by “”?

It can be extended, but as the person who runs, I wouldn’t permit it to be on there - I don’t have the time or resources to administer a routing server for visitors to and there’d be no practical way for me to recoup the money it cost. You can use’s routing at itself.