This guide will walk you through the process of getting set up to collect payments via the PaymentExpress gateway.
Notes:
You will need to get a production API username and password from PaymentExpress before you can use the gateway.
Drill down into the payment gateways configuration:

Add a new gateway:

Select Payment Express:

Now fill in the two fields, using your PaymentExpress API credentials:

As a final step, select which payment methods to use with Payment Express:

You should now be all set to go. As mentioned above, we highly recommend you run at least one real money transaction before exposing Spreedly to your customers.