Introduction to PayPal Express Checkout : Prerequisites

Prerequisites
Before you process PayPal Express Checkout payments:
See the information about clients in Getting Started with CyberSource Advanced for the Simple Order API.
For general information about the API versions, see Getting Started with CyberSource Advanced for the Simple Order API. The following table shows which Simple Order API version to use for the PayPal Express Checkout features.
 
When you open your PayPal business account, PayPal assigns you a PayPal account manager who helps you configure your PayPal account.
To set up your PayPal account:
Step 1
Log in to https://developer.paypal.com using your master Sandbox developer account.
To make testing easier, check the Log me in automatically box. This option makes it quicker for you to approve the test payments you process through the CyberSource and PayPal test environments.
Step 2
Click Accounts in the left pane to view your Sandbox Business and Buyer accounts.
Step 3
Step 4
The PayPal web site displays a new window.
Step 5
Step 6
Choose the My Account tab and click Profile. The Profile Summary page is displayed.
Step 7
Click My selling tools in the left pane.
Step 8
In the Selling online section, click the Update link under API access.
Step 9
Click Add or Edit API Permissions link under Pre-built Payment Solution.
Step 10
Click Add New Third Party button on the Manage Third Party Access page.
Step 11
For testing, enter cybersource_paypal_api1.cybersource.com, which is the CyberSource API account username.
For live transactions, enter paypal_cybersource_api1.cybersource.com.
Step 12
Click Lookup.
Step 13
If you are going to use reference transactions, contact your PayPal representative to enable billing agreements and reference transactions.
Step 14
Click Add.
Step 15
To edit or view permissions, click the Edit Third Party button on the Manage Third Party Access page.
Step 16