Google has released it’s AdWords API.

The API requires that you have a My Client Center account, so don’t be surprised if you don’t notice it on a regular AdWords account. It will allow you to generate custom reports and so forth, depending on your needs. There’s a limit on how many queries you can make per day with the AdWords API, just as there is with Google’s regular API. However, this quota will be set by the size of your AdWords account, rather than be a standard number.

This will probably most benefit SEM businesses, as they may be generating reports for large numbers of customers. If you’re just managing your own campaigns it may not be something you need, although if you have an inventory to deal with, it should make it easier to pause ads for out of stock items.

Not really sure what all this means? Google provides some great examples of what could be done with the AdWords API that might help you think about it. Possibly the best potential is to manage your account by time of day.

It should be very interesting to see what kinds of programs are developed over the next few months for AdWords API users. You’ll probably hear quite a bit about new programs if you go to SEO forums, hear from any marketers who know a lot about PPC and such.