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by Cody Fauser, ActiveMerchant committer and Shopify developer. Most online businesses need to receive payment. If you’re developing with Ruby, the standard for credit card authorization and capture is ActiveMerchant. ActiveMerchant provides a consistent interface to over 30 gateways all around the world and has processed millions of dollars of...

PayPal Express Checkout is easy to add to an existing ordering system. See how in this episode.

In this episode I show how to add Active Merchant's functionality to a Rails application to make a fully-functional checkout process.

Active Merchant is a great library for handling credit card transactions. In this episode I will show you the basics of using it to communicate with PayPal's gateway.

PayPal's IPN (Instant Payment Notification) service allows your app to get confirmation when an order is processed. In this episode I use IPN to mark a cart as purchased.

This episode is the first in a series on handling the checkout process for orders. Here we show how to complete purchases through PayPal's Website Payments Standard service.