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 Subscriptions Integration Guide.
To integrate the Express Checkout with In-Context flow, you must:
Read the Eligibility requirements to determine whether your Express Checkout integration is a good candidate for the In-Context Checkout experience. If In-Context Checkout does not support a feature that you currently use, your buyers are presented with the Express Checkout full-page redirect checkout flow.