What is the PayPal Developer Portal?

The PayPal Developer Portal offers support for developers who have questions about technical topics, such as APIs or integration. Below is a list of common topics searched for by developers. You can also browse and search on the Developer Portal for additional topics.

Account Authentication
Information about validating your visitor's PayPal account.

Encrypted Website Payments
To make online payments more secure, you can make Encrypted Website Payment buttons that rely on standard public key encryption for protection.

Identity API
PayPal offers a secure commerce Identity API that lets your customers sign in to your web site using their PayPal credentials.

Instant Payment Notification
Instant Payment Notification is a message service that automatically notifies merchants of events related to PayPal transactions.

Invoicing
Merchants, developers, and business solution providers use Invoicing APIs to automate the creation, delivery, tracking, and reconciliation of invoices with an integrated payments solution.

Mobile SDK
Accept PayPal, credit cards and other payments methods through mobile apps.

Name-Value Pair (NVP) API
Information and support on name value pairs and NVP SDKs.

PayPal Checkout
PayPal Checkout gives your buyers a simplified and secure checkout experience that keeps them local to your website or mobile app throughout the payment process.

Payflow Gateway
Payflow Pro is a high performance TCP/IP-based client-server architecture solution. It includes a secure payment gateway that gives merchants total control over the payment process.

PayPal Sandbox Support
Information and support for users testing in the PayPal Sandbox environment.

PayPal Shopping Cart
The PayPal Shopping Cart system allows buyers to select multiple items on your website and pay for them with a single payment.

Permissions Service API
PayPal's permissions service enables you to request and obtain authorization to make API calls and take action on behalf of your customers.

SOAP
The PayPal SOAP API is based on open standards known collectively as web services, which include the Simple Object Access Protocol (SOAP), Web Services Definition Language (WSDL), and the XML Schema Definition language (XSD).

Testing Your Apps in Sandbox
A guide for developers testing their apps in the PayPal Sandbox environment.

Virtual Terminal
Information about PayPal's Virtual Terminal - a web-based application that processes credit and debit cards, replacing swipe machines.

Website Payments Pro
PayPal's Website Payments Pro is an API-based solution that enables merchants and developers to accept credit cards, debit cards, and PayPal payments directly on their website.
 

PayPal Payments Standard
You can accept credit cards online easily and offers a streamlined checkout experience to customers using mobile devices.