Google's AdWords API service lets developers design computer programs that interact directly with the AdWords platform. With these applications, advertisers and third parties can more efficiently — and creatively — manage their large or complex AdWords accounts and campaigns.

The AdWords API client libraries make it easier to write code to access AdWords accounts.

By Google:

• Java Client Library
• DotNet Client Library
• Python Client Library
• Ruby Client Library
• APIlity (PHP Client Library)

By Others:

• Perl Client Library
• AdWords Toolkit for OCaml
• ColdFusion Client Library