AdWords API Version 12 Now Available

Wednesday, March 26, 2008

We are happy to announce the release of the AdWords API Version 12 (V12).

V12 introduces several changes to the AdWords API. Below, you'll find the main highlights from this release. For a complete list of V12 changes, please see our release notes.


  • Conversion Optimizer support: Now you can enable Conversion Optimizer to pay only when an ad click leads to a conversion to adjust cost-per-acquisition bids through the AdWords API . Using Conversion Optimizer requires conversion tracking to be enabled on an existing campaign with at least 200 conversions in the past 30 days.
  • CPC bidding for placement-targeted ads: Now you can use Website.maxCpc or
    AdGroup.siteMaxCpc to pay only when a user clicks on your placement-targeted ad.
  • Expanded code sample library: As mentioned in a previous blog post, we have released 140 new code samples, 20 in 7 programming languages. Check out it out at

V11 SUNSET IN 2008

Per our versioning policy, V11 will be supported for four months from today, after which time it will be turned off. Therefore, please make sure that you upgrade to V12 before July 26, 2008. As with every new version of the AdWords API, we strongly encourage you to review the Release Notes section of the Developer's Guide to learn more about this version.

UPDATE: April 2, 2008

Please note that now you can enable Conversion Optimizer to adjust cost-per-acquisition bids through the AdWords API. The way this feature was initially described was inaccurate. We apologize for the confusion.

-- Borana Toska, Product Marketing