Integration Guide

PayPal Payments Pro Integration Guide April 2012 45
5
Getting Started With Express
Checkout
To implement Express Checkout, start with the simplest Express Checkout integration and test
it. Then you can decide the kind of payment settlement actions you want to support.
 Implementing the Simplest Express Checkout Integration
 Testing an Express Checkout Integration
 Handling Payment Settlements With Express Checkout
 Issuing Refunds
Implementing the Simplest Express Checkout Integration
The simplest Express Checkout integration requires the following PayPal API operations:
SetExpressCheckout, DoExpressCheckoutPayment, and optionally,
GetExpressCheckoutDetails.
 Setting Up the Express Checkout Transaction
 Obtaining Express Checkout Transaction Details
 Completing the Express Checkout Transaction
Setting Up the Express Checkout Transaction
To set up an Express Checkout transaction, you must invoke the SetExpressCheckout API
operation to provide sufficient information to initiate the payment flow and redirect to PayPal
if the operation was successful.
This example assumes that you have set up the mechanism you will use to communicate with
the PayPal server and have a PayPal Business account with API credentials. It also assumes
that the payment action is a final sale.
When you set up an Express Checkout transaction, you specify values in the
SetExpressCheckout request and then call the API. The values you specify control the
PayPal page flow and the options available to you and your buyers. You should start by setting
up a standard Express Checkout transaction, which can be modified to include additional
options.
To set up the simplest standard Express Checkout transaction:
1. Specify that you want to execute the SetExpressCheckout API operation and the
version you want to use.