recently i worked with the google's adword, key word suggestions api.
Can any one tell me about the similer api , microsoft offerening..????
I believe when you create a campaign and add keywords there is an option for you to find similar keywords. There is also a Microsoft ad intelligence excel add-in that will give you keyword suggestions.
The link to the ad intelligence add-in :http://advertising.microsoft.com/search-advertising/advertising-intelligence
Jason Hong, Account Manager for Microsoft Advertising.
Just to add on to the options Jason gave you....
You can also inquire to get into the Keyword Services Platform Beta which does have an API-based interface for you if you have an application that you're wanting to enable. You can find out more information about that beta here: http://advertising.microsoft.com/search-advertising/ksp as well as use this form to sign up for beta participation: http://advertising.microsoft.com/adcenter-beta-pilot-signup.
Remember to check Keyword Services Platform in the Which areas are you interested in testing? area on the beta signup form.
Cheers!.bbOperations Program Manager | API - SMB Resellers - Tool Providers
Operations PM - API/SMB Reseller/Tool Provider - MSFT