In Heartland:
Log in and navigate to your 'Account Settings' screen
Locate and make note of your 'Secret API Key'
In Optix:
Select Apps from the left-hand menu
Scroll down and click Heartland Payment Systems
Click Install
Input the 'Secret API Key' you retrieved from Heartland
Click SaveĀ
Need more info on Apps, Integrations & Payment Gateways?