Due to excessive load and abuse this service has been retired.
All queries will now return an empty result-set.
In the near-future it will be removed entirely.
If you rely upon this service, and I assume some of you do because you've been making hundreds of requests a minute, for months, you should run your own instance.
The code is available here:
For a €10/month I'll give you an API-key so that you can continue to access this site.
Drop a mail to email@example.com, if you're interested.