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

Add a new gateway:

Select NMI from the list:

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

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

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.