PayPal Offers New SDK for Developers Using Microsoft Visual Studio and the .NET Framework
New Web Services Capabilities Enable Developers and Merchants to Build Secure and Cost-Effective Online Payment Solutions

NEW ORLEANS--June 23, 2004--

PayPal, the global online payment service, today expanded its PayPal Web Services offering by introducing a new software development kit (SDK) for the Microsoft platform. The PayPal SDK for Microsoft ASP.NET enables the more than 2.5 million Microsoft .NET developers worldwide to build secure and cost-effective e-commerce applications that easily integrate with the PayPal platform.

Available today as a free download to members of the PayPal Developer Network, the PayPal SDK for Microsoft ASP.NET is compatible with all languages and tools that run on the Microsoft .NET Framework. It includes controls, scripts and sample applications that help developers fully integrate PayPal Website Payments, PayPal's Instant Payment Notification (IPN) service, and Payment Data Transfer (PDT). The new SDK provides developers with access to seven PayPal Web controls: Buy Now, Add to Cart, View Cart, Checkout, Upload Aggregate Cart, Upload Complete Cart and Subscription.

With the addition of the PayPal SDK for ASP.NET, PayPal has extended the Microsoft ASP.NET Commerce Starter Kit, a sample ASP.NET application that provides code to accomplish common Web development tasks.

"We launched PayPal Web Services earlier this year to help make the development of e-commerce easier for a wide range of individuals, developers and businesses to instantly offer innovative and secure payment applications," said Dave McClure, director of PayPal's Developer Network. "With our new SDK, we're extending this advantage to millions of Microsoft developers, making it easier for them to integrate PayPal Website Payments into their e-commerce sites."

"Working with PayPal, we're able to bring together two powerful forces: millions of developers in the .NET Framework community and an e-commerce platform that enables access to more than 45 million PayPal member accounts around the world," said Brian Goldfarb, product manager of Web platforms and tools for Microsoft. "The PayPal SDK for ASP.NET simplifies an important step in the process of building a business on the Web, and further enhances the Commerce Starter Kit by providing payment processing, which is a crucial part of any online business."

PayPal Web Services

The new SDK also includes sample code and applications for APIs recently released in PayPal Web Services, made available to developers and merchants in May of this year. PayPal Web Services comprise four informational and transactional application programming interfaces (APIs) enabling developers and merchants of all sizes to create e-commerce solutions and applications that integrate with the PayPal platform. PayPal Web Services are based on open standards, supporting Simple Object Access Protocol (SOAP) and Web Services Description Language (WSDL).

Developers and merchants can set up and access PayPal Web Services at PayPal Developer Central ( Designed as an information hub to educate e-commerce developers, Developer Central offers information on how to set up developer certificates, get started with PayPal APIs, and access developer forums for discussion and questions. Developers can also use the PayPal Sandbox, a testing environment for PayPal Web Services.

The PayPal Web Services architecture shares a common API structure with eBay's Web services offerings. Developers can work with both standards-based platforms without additional training. For more information about PayPal toolkits, sample code and documentation, visit The PayPal SDK for ASP.NET is also being distributed to Borland's developer community and will be included in the next version of Borland Delphi for the Microsoft .NET Framework.

About the PayPal Developer Network

The PayPal Developer Network (PDN) enables merchants and developers to quickly and easily add eCommerce capabilities to their Web sites and applications. PDN provides its more than 250,000 members with a wide range of standards-based technical tools, resources and solutions for developing solutions that incorporate PayPal's secure and cost-effective payment service used by more than 45 million member accounts around the world. For more information and to join PDN, please visit

About PayPal

PayPal, an eBay (Nasdaq:EBAY) Company, enables any individual or business with an email address to securely, easily and quickly send and receive payments online. PayPal's service builds on the existing financial infrastructure of bank accounts and credit cards and utilizes the world's most advanced proprietary fraud prevention systems to create a safe, global, real-time payment solution. Founded in 1998, PayPal has more than 45 million accounts and is available to users in 45 countries around the world. More information about the company can be found at

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