Asp.Net PayPal Control

Rich PayPal integration library for your ASP.NET MVC and Web Forms Websites. (.NET Framework)

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C# and VB.NET samples

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Documentation

.NET Framework, Visual Studio Versions

Perpetual licensepay once · no subscription

Payment code is the last place you want surprises.

Wire PayPal into ASP.NET with verified IPN callbacks and server-side events, and keep the money path boring.

The work · 6 capabilities
01

Handle PayPal IPN in ASP.NET with verified callbacks

Capture PayPal Instant Payment Notification (IPN) and have the component verify the message with PayPal before your code updates orders, memberships, or fulfillment. Instead of stitching together raw form posts and edge cases, you get server-side events (like IPN_Notified) with strongly-typed data so the "paid but not activated" scenario is easier to prevent.
PayPal IPN ASP.NET verified callback flow with server-side event
02

Build PayPal Website Payments Standard buttons fast

Generate PayPal Website Payments Standard buttons (Buy Now, Donation, Subscription, Cart flows) from a single ASP.NET control instead of manually assembling PayPal form variables. Use the design-time Smart Tag wizard for Web Forms or MVC component composition to ship a working checkout with fewer moving parts.
ASP.NET PayPal control wizard generating Website Payments Standard buttons
03

Process PayPal return (PDT) with server-side events

Handle the synchronous PayPal return (PDT/return) using a dedicated PayPal Return Handler or same-page event (PayPal_Returned) so your app can display the right confirmation and capture return variables consistently. This reduces the common confusion around return URL behavior and missing fields by centralizing the post-checkout return flow.
PayPal PDT return handler in ASP.NET with PayPal_Returned event
04

Persist order metadata across PayPal with server-side state

Store transaction metadata in AdditionalDataItems so you can correlate PayPal callbacks to your internal order, user, or cart without exposing sensitive values in the browser. The data is saved server-side (default ~/App_Data) and can be retrieved in IPN/PDT handlers, with configurable cleanup via DeleteAdditionalDataTempFilesInHours.
ASP.NET PayPal state management using AdditionalDataItems stored server-side
05

Add advanced PayPal fields via AdditionalFormVariables

Extend PayPal form posts with AdditionalFormVariables when you need fields not exposed as first-class properties (for example solution_type or landing_page). This keeps your integration flexible as PayPal options change, without forcing you to fork the component or hardcode form fields throughout your app.
ASP.NET PayPal AdditionalFormVariables adding extra PayPal fields
06

Generate encrypted PayPal buttons with built-in certificates

Use Encrypted Website Payments (EWP) to protect button parameters from tampering, with built-in tooling to generate PKCS12 and PEM certificates and an option to block non-encrypted payments. This is especially useful when you need stronger integrity guarantees for amounts, item identifiers, or subscription parameters.
Encrypted Website Payments (EWP) PayPal button in ASP.NET with certificate generation
Compatibility

Supported environments.

$id

1

.NET Framework

4.5, 4.5.*, 4.6, 4.6.*, 4.7

Visual Studio Versions

2013, 2015, 2017

Terms that have become rare.

01

Your users' data never leaves their machine.

The control runs entirely inside your application. Nothing it edits ever touches our servers - there is no cloud dependency to disclose in your compliance review.

02

You buy it once. It is yours.

A true perpetual license, sold this way since 2007. No subscription meter running while you finish the work.

03

One-to-one support from a human domain expert.

Not a chatbot, not a call center. Support is a live conversation with the engineers who build the software. One call away, on Zoom or Teams, free.

From developers who shipped with it.

SpiceLogic's Paypal control has provided a simplified, flexible, and cost-effective solution for several of our projects. It has greatly reduced the time to incorporate a fully functional payment system on the websites we develop.
Michael Kitterman Michael Kitterman Lead Developer, Dingzoom, Inc. Verified via LinkedIn
We are using Paypal as one of our payment solutions. We had the problem of a fluctuating exchange rate, so generating "Buy now" and "Add to cart " buttons on the Paypal website would not work whilst also being very impractical for a large set of products. I was thrilled to find SpiceLogic's web site and specifically, their Paypal Asp.net Control. This solved all our problems in a snap, making it possible to generate Paypal buttons on the fly and then storing the resulting markup in our database, then rendering it on our webpage - AUTOMATICALLY!! Fantastic product, its a no-brainer. Regards, Luke.
Luke Grews Co-owner, Metrodora, South Africa

Integrating this week? Talk to the engineers who build it.

Every trial and every license includes free live 1:1 sessions on Zoom or Teams. You will talk to a real human, a domain expert who builds this software, and we will help you wire it into your app. No chatbot, no call center, no ticket queue.

Weigh it yourself. The evaluation build is the full control, in your solution, today.

Download samples

C# and VB.NET samples

Book a live demo

Free, 1:1 with our engineers