PayPal, the global leader in secure, online payments helps businesses automate their invoices and get paid faster. Using the PayPal Invoicing APIs, businesses can easily automate their invoicing workflow electronically, from creation and delivery to receiving payments, tracking and management of invoices. Use PayPal Invoicing APIs as your all-in-one business invoicing solution to streamline your invoicing and payment needs.
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The PayPal Invoicing Ruby SDK by PayPal allows developers to integrate the PayPal Invoicing API's methods for creating and managing invoices into their Ruby projects and applications. Code examples and sample applications are provided in the documentation.
The PayPal Invoicing PHP SDK by PayPal allows developers to integrate the PayPal Invoicing API into their PHP projects and applications. This SDK requires PHP 5.2 or greater and the curl/openssl PHP extensions.