This Sezzle technical documentation provides different types of guidance for Sezzle merchants depending on what you want to accomplish.
If you want to go directly to guidance about how to integrate a specific plugin like Shopify, go to Plugin Guides
To learn more about the Sezzle API and using it to access Sezzle integration features, you have two options:
See the image below for an illustration of how to find these and other links.
Click to enlarge image
Updated about 2 months ago