Integration Guide

Table Of Contents
PayPal Payments Standard Integration Guide June 2012 329
Third-Party Shopping Carts – The Cart Upload Command
Implementing the Instant Update API With the Cart Upload Command
7
PayPal Review Your Payment Page With Shipping Options, Insurance, and Tax
Best Practices for Implementing Instant Update
PayPal recommends its list of best practices as a checklist for completing your implementation
of the Instant Update API.
Meet the pre-requisites – Provide individual item details instead of aggregate order
amounts to take advantage of the Instant Update API.
Streamline the checkout experience – Eliminate the shipping options page in your
standard checkout experience.
Use the default callback timeout – Use the recommended 3-second callback response
timeout.