Integration Guide

Table Of Contents
Implementing the Instant Update API
About the Instant Update API
7
78 May 2010 Express Checkout Integration Guide
3. Modify the existing Express Checkout API calls to accommodate new parameters.
Send the callback URL, shipping, insurance, and tax information to PayPal in the call to
SetExpressCheckout.
Call GetExpressCheckoutDetails to obtain the buyers final choices for shipping
and insurance, if applicable.
Call DoExpressCheckoutPayment with the buyer’s final selections.
4. Eliminate your shipping options page.
5. Test your integration for the callback and flat-rate shipping options.
Post-Integration Checkout Experience
After you integrate the Instant Update API, you can display the shipping options, related
insurance options, and the tax amount on the PayPal Review page.
The shipping and insurance options appear in drop-down menus as shown below.