Have you looked into PayPal Pro? https://www.paypal.com/us/cgi-bin/webscr?cmd=_wp-pro-overview-outside https://www.paypal.com/us/cgi-bin/webscr?cmd=_wp-pro-over

Have you looked into PayPal Pro? https://www.paypal.com/us/cgi-bin/webscr?cmd=_wp-pro-overview-outside https://www.paypal.com/us/cgi-bin/webscr?cmd=_wp-pro-overvie... and https://cms.paypal.com/cgi-bin/marketingweb?cmd=_render-content&content_ID=developer/solutions_carts_wp_pro https://cms.paypal.com/cgi-bin/marketingweb?cmd=_render-cont... There are a few options you can take, ranging from creating a Google Checkout account, PayPal account or even going as far as a merchant account (where your site is processing a very large amount of transactions a month). Some say PayPal is more buyer-centric and others say Google Checkout is more seller-centric. One thing to consider with PayPal (either Pro or Express Checkout), you need to build into your design and flow the way the customer will purchase the product, enter the product into the shopping cart and then do one of two things: 1. If using PayPal pro, continue the transaction all on your site and then return to the product summary/confirmation page. 2. If using Express Checkout, leave your site to PayPal and then return to the product summary/confirmation page. Here's some more information on PayPal Pro, API and integration design: https://www.paypalobjects.com/WEBSCR-550-20081103-1/en_US/pdf/PP_WebsitePaymentsPro_IntegrationGuide.pdf https://www.paypalobjects.com/WEBSCR-550-20081103-1/en_US/pd... What are you building?