Question best understood from scenario:
I'm working at the hospital where there are multiple workstations but I'm constantly on the move so I'm not logged in to my personal accounts
Sometimes I need to throw a short email or personal note but typing on mobile is too slow
I'd want to open browser on a shared workstation and type text into some textfield and push it instantly to mobile to use it there
I can NOT use services requiring login (on desktop side at least) since that's 1) an extra, time requiring step 2) security issue eg if I forget to logout from shared workstation
One example of implementation would be online notepad which creates random session with a short url which I then open in browser on mobile and copy & paste. None of the online notepads I've found are updated realtime on mobile site.