First, make sure you understand the overall goals of your integration project—make your design decisions before you start building it.
Ensure you have worked with the Flex team to understand which of your products are HSA/FSA eligible and which ones are not.For example, if you’re building a Subscription integration, read designing an integration to learn more about design decisions and pricing models to understand how to translate your business model with Flex.Next, create your products and prices in Flex. Create new products and prices in the dashboard or with the Products API.
You can create as many products as you need to represent your product catalog. You can also create multiple prices for each product. Whether you should create multiple products as opposed to multiple prices depends on several factors. Generally, however, you want to:
Create multiple prices for a single product if you’re selling the same item at different price points.
Create multiple products if the items require different provisioning or fulfillment in your application.
Prices use integer cents as the unit_amount. Therefore, if you’d like to specify a price of $10.99 you would pass in the value 1099 as the unit_amount.Create a one time price