The PayPal Invoice SDK provides Java APIs to create and manage Invoices using the PayPal's Invoicing Service API.
'com.paypal.sdk:invoicesdk:2.1.96'
<dependency>
<groupId>com.paypal.sdk</groupId>
<artifactId>invoicesdk</artifactId>
<version>2.1.96</version>
</dependency>
<dependency org="com.paypal.sdk" name="invoicesdk" rev="2.1.96"/>
"com.paypal.sdk", "invoicesdk", "2.1.96"