PayPal .NET SDK

The PayPal .NET SDK makes it easy to add PayPal support to your .NET web application and is built on PayPal's REST APIs.

TLSv1.2 Update

The Payment Card Industry (PCI) Council has mandated that early versions of TLS be retired from service. All organizations that handle credit card information are required to comply with this standard. As part of this obligation, PayPal is updating its services to require TLS 1.2 for all HTTPS connections. At this time, PayPal will also require HTTP/1.1 for all connections. Click here for more information

A new mode has been created to test if your server/machine handles TLSv1.2 connections. Please use security-test-sandbox mode instead of sandbox to verify. You can return back to sandbox mode once you have verified.

Prerequisites

• .NET 4.0 or later

Documentation

• SDK Home Page - A great starting place for using this SDK; includes links to the wiki, sample project source code, releases, and more!
• SDK Wiki
  • Getting Started - Everything you need to begin using this SDK.
  • Quick Start - For those looking to hit the ground running!
  • Samples
  • Classic SDK Compatibility
  • FAQ
  • Contributing to the SDK

General documentation regarding the PayPal REST API and related payment flows can be found on the PayPal Developer site.

• PayPal Developer Documentation
• PayPal REST API Reference

License

• PayPal, Inc. SDK License - LICENSE.txt