For those of you who have been eagerly awaiting the REST APIs, wait no more. You can now find our Bugzilla server’s APIs at https://bugzilla.wikimedia.org/bzapi. Documentation about the APIs is available at https://wiki.mozilla.org/Bugzilla:REST_API.
If you find any issues with the bugzilla instance or the APIs, submit a bug. Make sure you set the Component to Bugzilla so that it gets my attention.