Update: As of July 9th, 2015, this temporary limit has been removed.
To ensure reliable performance for all advertisers during
advanced URL upgrades, the AdWords API has placed a temporary limit on the number of
AdGroupAd ADD
operations that can be performed on an advertiser account per day. Other types of requests are not affected by this change. Please review the
RateLimit documentation and make sure your code handles the
RateExceededError properly.
During most normal operations, you won’t run into these limits. However, if you are uploading a very large amount of new ads in a short period of time and find yourself running into this error frequently, let us know on
our forum and we will work with you to address the issues.
Anash P. Oommen, AdWords API Team