This project integrates PayPal into the Drupal Commerce payment and checkout systems. It currently supports off-site payment via PayPal Payments Standard (WPS) and PayPal Express Checkout (EC), off-site or on-site payment via PayPal Payments Advanced (PPA) and Payflow Link (PFL), and on-site credit card payment via PayPal Payments Pro (WPP). The PayPal WPS / EC integration supports PayPal's Instant Payment Notifications (IPNs) to react to authorizations, captures, voids, and refunds with full logging for testing and debugging.
We recently added PayPal Bill Me Later support on top of the Express Checkout integration to enable merchants to extend financing opportunities to their customers.
The full integration for PayPal Express Checkout, PayPal Payments Advanced, and Payflow Link was added in the 2.x version of the module and has been verified by PayPal. There is no upgrade path for the 1.x branch, so it has been discontinued. Additionally, this module deprecates the third party project(s) attempting to extend this module for EC support.
Sponsored by Commerce Guys.