Support for PayPal is current in Beta and only available in the sandbox.
We’re excited to announce that Authorize.Net will soon support PayPal™ as a payment method. The new feature will allow merchants to offer PayPal on their Authorize.Net payment forms, potentially attracting new customers and increasing their overall sales. Merchants will also be able to view PayPal transactions within reports generated in the Merchant Interface.
We encourage you to update your payment solutions to include PayPal as a payment method using the appropriate guide. Please note, PayPal is currently only available using the Advanced Integration Method (AIM):
PayPal Express Checkout Services using AIM XML PDFHTML
PayPal Express Checkout Services using AIM NVP PDF
At this time, we are only communicating the beta launch to our developers. Our goal is to give you the opportunity to integrate PayPal into your solutions before we announce its availability to our entire merchant base.