When you login to your Shopper Approved dashboard, go to the App Marketplace by clicking the menu icon in the top left corner and choose “App marketplace” under “Review Tools”.

Click the “Get Started” button on the Postscript card.

You’ll see a box to enter your Postscript API keys:

These API keys can be found in your Postscript Dashboard here. If you haven’t already created API keys, click the “Create Security Key Pair” button and you’ll be given both a public and a private key: