Hi, The AdGroup object doesn't have a multiplier field. I think you may be referring to experiments ( http://code.google.com/apis/adwords/docs/reference/latest/AdGroupService.ManualCPMAdGroupExperimentBidMultipliers.html ).
We have an example that shows how to create an AdGroup with a max CPC bid: http://www.google.com/codesearch/p?hl=en#Fu0vUbQ37f4/trunk/examples/v201109/AddAdGroup.php&q=Tags:.*AdGroupService%20v201109%20package:google-api-adwords-java%7Cgoogle-api-adwords-php%7Cgoogle-api-adwords-python-lib%7Cgoogle-api-adwords-dotnet%7Cgoogle-api-adwords-ruby%7Cgoogle-api-ads-ruby%7Cgoogle-api-adwords-perl&sa=N&ct=rx&cd=2 You should be able to easily adapt that to update an existing AdGroup. - Kevin Winter AdWords API Team -- =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ Also find us on our blog and discussion group: http://adwordsapi.blogspot.com http://groups.google.com/group/adwords-api =~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~=~ You received this message because you are subscribed to the Google Groups "AdWords API Forum" group. To post to this group, send email to adwords-api@googlegroups.com To unsubscribe from this group, send email to adwords-api+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/adwords-api?hl=en