Integration Guide

Table Of Contents
Express Checkout Integration Guide May 2010 93
Immediate Payment
Integrating Immediate Payment for Third-Party Checkout
8
2. In the call to the SetExpressCheckout API operation, you must pass the following
Immediate Payment information:
ALLOWEDPAYMENTMETHOD: This is the payment method type. For immediate payment,
the value is InstantPaymentOnly.
BUYERUSERNAME: eBay provides you with this value.
L_EBAYITEMCARTIDn: 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_EBAYITEMNUMBERn: This is the eBay item number.
Buyers shipping address.
3. The SetExpressCheckout response returns a TOKEN.
4. The buyer is redirected to PayPal.
5. The buyer reviews their payment and clicks Continue.
6. (Optional) Call GetExpressCheckoutDetails. The GetExpressCheckoutDetails
response returns information about the buyer.
7. In the call to DoExpressCheckoutPayment, you must pass:
ALLOWEDPAYMENTMETHOD: This is the payment method type. For immediate payment,
the value is InstantPaymentOnly.
L_EBAYITEMCARTIDn: eBay provides you with this value.
At this time, PayPal checks the availability of the eBay item.
8. If the item is available and payment is successful, the DoExpressCheckoutPayment
response returns the eBay transaction ID (EBAYITEMAUCTIONTXNID).
Integrating Immediate Payment for Third-Party Checkout
To integrate Immediate Payment for third-party checkout into your Express Checkout
implementation, you add a few new fields to SetExpressCheckout and
DoExpressCheckoutPayment.
The Call to SetExpressCheckout
You must have Express Checkout integrated into your payment solution. It is recommended
that you sell one eBay item in a transaction or a quantity of the same item (considered a single
eBay listing).