How Do You Handle Custom Product Options with Add-On Prices on Headless Shopify?

Last updated: October 21, 2026. Disclosure: Webiots develops Ultimate Product Options, the app used in the setup steps. Quick answer: You can manage custom product options with add-on prices on headless Shopify by decoupling frontend UI inputs from cart mutations. Custom attributes are submitted as line item attributes using the Shopify Storefront API, while price […]