OverDrive API Partners
As of 30-APRIL-2015, attempts to use invalid client authentication tokens have generated an error rate in the OverDrive APIs that is impacting our service. OverDrive is investigating the source of the invalid client authentication tokens causing the errors. We will post again to this thread with updates. For now, if your application/service is using an invalid client authentication token, simply request a new one before proceeding with additional requests. Patron authentication tokens do not appear to be affected at this time.
Thanks for your continued partnership.
-The OverDrive API Team