Our hosting company will run maintenance jobs on our server tonight (Wednesday) from 23:00 CEST until 9:00 CEST tomorrow. Thus, our server might not be available during this time. All services are affected (languagetool.org, community.languagetool.org, our HTTP API).
I've just checked my clock, and I think they're a bit late with reporting this.
They (the hosting company) sent this a week ago, but I forgot to report it here. Chances are that the downtime will only be a few minutes, but we cannot be sure.
perhaps you could set up a script to automatically 'forward' them in the future.