Advanced Features Guide

Table Of Contents
Immediate Payment
About Immediate Payment For Third-Party Checkout
10
102 April 2012 Express Checkout Advanced Features Guide
It does inventory checking at eBay and attempts to purchase the item.
After the buyer selects the item on eBay, the buyer is redirected to your website Express
Checkout flow. The following figure shows how Immediate Payment for third-party checkout
integrates into your checkout flow:
From left to right, the following events are represented. The numbered callouts in the figure
directly correspond to the numbered comments below:
1. The eBay flow for third-party checkout redirects the buyer from an eBay payment review
page to your shopping cart page. On your shopping cart page, the buyer initiates Express
Checkout by clicking the Checkout with PayPal button.
2. In the call to the SetExpressCheckout API operation, you must pass the following
Immediate Payment information:
PAYMENTREQUEST_
n_ALLOWEDPAYMENTMETHOD: This is the payment method type.
For immediate payment, the value is InstantPaymentOnly.
BUYERUSERNAME: eBay provides you with this value.
L_PAYMENTREQUEST_
n_EBAYITEMCARTIDm: eBay provides you with this value.
Additionally, in the call to the SetExpressCheckout API operation, you must pass the
following Express Checkout API parameter data:
CHANNELTYPE: The value of the channel type, which is eBayItem.
L_PAYMENTREQUEST_
n_EBAYITEMNUMBERm: This is the eBay item number.
Buyers shipping address.