Hi,
I have read this post V2 API Coupon Codes and understood that creating coupon is not supported in API yet, but in the case that I created coupon codes through Square seller dashboard, is there any API that can redeem the coupon code?
Currently, Square’s APIs do not support direct redemption of coupon codes generated in the Seller Dashboard. Coupons applied at checkout are handled in Square’s POS and online checkout flows, but there is no endpoint to programmatically validate or redeem them. The workaround is to apply discounts through the Orders API or Catalog Discounts which can be applied to transactions, but real coupon code redemption isn’t exposed through the API yet.