Dozens of Google AdWords developers are complaining that all of a sudden, their access to use the AdWords API has been restricted.
A Google AdWords API Help thread has the complaints.
These developers are citing that their developer "tokens" are being "rejected" all of a sudden.
The first complaint came yesterday morning from Kyle who wrote:
I have had an approved developer token for months now and today for some reason my developer token has been rejected.
I have re-applied for the developer token, but can some provide some insight as to why all of the sudden my account has been rejected.
As of writing this story, Google has not yet responded to all the developer complaints.
It seems to me there is some bug, not sure how major, but seems to be widespread, causing all of these old tokens to expire and thus be rejected.
One user added his frustration:
We have had the accounts for about 5 years! That is how long our token was working fine. To give you an idea, over that time we have used about 230,000 credits, due to our spend, we have over 75 million unused API credits, so I doubt the issue is related to any policy or account linking changes. We don't do anything but pull stats for our singular client account (which is our only company's Adwords account).
Forum discussion at Google AdWords API Help.
Update: Bad news, this was done on purpose. More details over here.