PayPal Hacks 100 Industrial-Strength Tips & Tools
http://www.oreilly.com/catalog/payhks/chapter/index.htmlмм.. книжка, и соотв. примеры из нее:
Hack 10: Send Money to Anyone (PDF Format)
Hack 17: Request Money the PayPal Way (PDF Format)
Hack 30: Create a Purchase Button for Services (PDF Format)
Hack 40: Accept Donations (PDF Format)
Hack 54: Create a Dynamic Storefront (PDF Format)
Hack 61: Sell Subscriptions to Your Online Content (PDF Format)
Hack 65: Receive Instant Payment Notifications (PDF Format)
Hack 79: Display Donation Goals on Your Web Site (PDF Format)
Hack 88: Make Your First API Call (PDF Format)
Hack 96: Issue Payments en Masse with the Mass Pay API (PDF Format)