Print-on-demand items use products from our catalog as blanks for printing. These blank goods are sourced daily from our vendors, with inventory fluctuating over time. It is recommended that you check availability daily for the products you use to inform what products you make available for ordering. 

The Product Catalog Inventory Endpoint can be used to check availability for a set of products from our catalog. You can supply up to 50 product IDs at a time. The endpoint will return a list of all SKUs for each product, along with an indicator for the availability of the SKU. Since blanks are sourced from a number of vendors with inventory counts fluctuating throughout the day, the API does not return a specific inventory count but instead a boolean indicating if the item is available for use.