Sunrise Integration commented on Redeem gift card from API

Assuming you're talking about the Gift Cards feature from within Shopify (the Pro and Unlimited plans), we've tried to do this in the past and the Shopify API does not have hooks into the Gift Card features. I've seen posts from Shopify saying that direct access to the Gift Card API is on the way but nothing yet. Here are a couple other posts that we referenced previously:

https://ecommerce.shopify.com/c/shopify-apis-and-technology/t/gift-card-api-182821

https://ecommerce.shopify.com/c/shopify-apis-and-technology/t/creating-gift-cards-via-the-api-178888

https://ecommerce.shopify.com/c/shopify-apis-and-technology/t/gift-card-fulfillment-with-shopify-order-api-179222

Hope that info helps!