Express Checkout API flow
Important: This integration method is deprecated as of January 1, 2017. PayPal continues to support existing merchants using this method, but please be advised new features and enhancements will not be applied to these integrations. For new integrations, see the PayPal Checkout Integration Guide.
This diagram shows the Express Checkout API operations that are called during a typical payment transaction. For detailed integration information, see Express Checkout with In-Context integration guide.