This Saturday, July 24 at noon, addons.mozilla.org will undergo a 4.5 hour maintenance period. While we will try to make many pages available as read-only, please plan for the site to be completely unavailable for the full 4.5 hour window. This will also affect AMO’s API and services such as add-on update checks and Add-ons Manager searches.
For more information, please see bug 572518.
Update: This downtime has been rescheduled.