Kartra integrates with four different payment gateways:
To add your payment gateways you will click My Integrations (Marked #1 Below) on the sidebar. Then you should be taken to Integrations. If not click Integrations (Marked #2 Below) in the top menu.
To make things just a bit easier, go to the drop down box and choose “Payment” (Marked #3 Below) and this will display only the four payment gateway integrations. You will see a green check-mark next to any integrations you have already set up.
These gateways involve a combination of using the specific service’s own API and the Kartra system. This will mean some services can be corrected in Kartra while others will need to be addressed via the payment gateway.