A pre-integrated cart is a shopping cart that already supports Google Checkout and is developed by a Google Checkout integration partner. Likewise, a pre-integrated order processing system is already integrated with Checkout by an integration partner. Most pre-integrated carts include pre-integrated order processing.
Google Checkout has partnered with a variety of shopping cart providers to provide eCommerce platforms pre-integrated with Google Checkout. Because the integration work has already been done for you, you can start using Google Checkout quickly and without needing any programming or API skills.
Pre-integrated Shopping Cart
If you want to use Google Checkout to sell multiple products and don't have a shopping cart, (and if a cart from Google doesn't meet your needs), you may be in the market for a pre-integrated shopping cart from one of the integration partners below. If you already have such a shopping cart, then enabling Google Checkout for your shopping cart takes only a few simple steps.
Pre-integrated Order Processing
Most pre-integrated carts include pre-integrated order processing.
Pre-integrated Shopping Cart - To add Google Checkout to your website via a pre-integrated shopping cart:
(http://checkout.google.com/support/sell/bin/answer.py?answer=42963) in the Google Checkout Merchant Center.Pre-integrated Order Processing - If you'd like to process Google Checkout orders in your pre-integrated shopping cart, ask your shopping cart provider for the appropriate API callback URL
(http://checkout.google.com/support/sell/bin/answer.py?answer=134463) then enter this information in the Google Checkout Merchant Center.
As a merchant, you can choose from a variety of pre-integrated carts and order processing systems provided by an integration partner below. The choices are in the following groups: