Google Checkout API resources
For your convenience, we've created a variety of tools to help you before, during, and after your Google Checkout API integration.

Documentation
Ready to integrate now? These reference materials can help guide you through the integration process:

Integrate your website or shopping cart  (Easier)

• Developer's Guide: Start with the Developer's Guide for a technical overview of Google Checkout, step-by-step integration instructions, troubleshooting tips, and more.
• Checkout buttons: View Checkout button options, review layout guidelines, and learn about proper use policies.

Integrate your shopping cart and order processing system  (More features)

• Developer's Guide: Start with the Developer's Guide for a technical overview of Google Checkout, step-by-step integration instructions, troubleshooting tips, and more.
• Sample code: Find sample code in your platform's language and use it to build the foundation for your integration.
• XML Schema Definition (XSD): Validate your XML messages with our XML Schema Definition.
• Cookbook: Want to post a cart via an HTML form? Set up HTTP Basic Authentication? Learn how to address these and other common integration scenarios.
• Checkout buttons: View Checkout button options, review layout guidelines, and learn about proper use policies.

• FAQ: Find answers to a wealth of frequently asked questions.
• Developer's Forum: Post questions and exchange advice with Google Checkout merchants about integration and other topics.
• Google Checkout blog: Read the latest news, tips, and observations from Google about the Google Checkout API.