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Chapter 1. The PayPal API

Overview of the PayPal API

PayPal provides developer access to its payments system via its Name-Value Pair API, referred to as NVP API for the remainder of this book. The NVP API allows a merchant to access PayPal and accomplish the following tasks:

Accept PayPal during your checkout process via Express Checkout

Charge a credit card during a Direct Payment session

Capture previously authorized Express Checkout and Direct Payment payments

Reauthorize or void previous authorizations

Pay single or multiple recipients via Mass Payment

Issue full refunds or multiple partial