Shopify gift card create via giftCardCreate and disabling a gift card

In-depth guide

Steps

1. Use the Admin GraphQL giftCardCreate mutation with a GiftCardCreateInput specifying initialValue (as a decimal string in the store's currency), and optionally expiresOn, customerId, and note.
2. The mutation returns the gift card's id, lastCharacters (for display), and maskedCode; the full code is only returned at creation time—store it securely if you need to deliver it to the recipient.
3. To disable (deactivate) a gift card, call giftCardDisable with the gift card's ID; a disabled gift card cannot be used at checkout.
4. Query giftCard by ID to retrieve balance, expiresOn, and enabled status for customer service lookups.
5. To search for gift cards by code suffix, use the giftCards query with a query filter on lastCharacters.
6. Consult current Shopify docs for currency handling: gift card values are stored in the store's default currency, and multi-currency behavior at redemption is subject to current Shopify Markets rules.