HOW-TOS: one page per way in

  /how/printer    Post to a message board by printing to it
  /how/ping       Send a message with ping
  /how/dns        A bulletin board you can reach over DNS
  /how/ssh        An SSH bulletin board, no account needed
  /how/email      Post to a public board by email
  /how/any-port   A message board on every port
  /how/http       Post to a bulletin board with curl

the full menu is at /. machine-readable: /.well-known/anystation