While one of its most popular features is the ability to simply sign in to your PayPal account to submit payments, merchants using PayPal can also accept credit cards directly just like a traditional merchant account solution would provide. PayPal calls this solution Payments Pro, and I'm going to show you exactly how you can process credit cards directly with PayPal's API using their Payments Pro web service API's.

They've broken it up into the different steps including:

• Setting up the configuration
• Creating a first API request
• Sending the HTTP request to the PayPal API (via curl)
• Parsing the response