How to configure PayPal for checkout

PayPal Fast Checkout (REST API)

Step 1

Click name at top right, Account Settings OR go directly to https://developer.paypal.com/

Step 2

Click "My Apps & Credentials".  Here you will proceed with the REST API.  You need to retrieve the unique "Client ID" and "Secret Key" and then enter those values into the E-Commerce Configuration. Settings > Webstore.

Step 3

Make sure "Live" is selected or else requests will go to PayPal sandbox