The Voucher API lets your store issue vouchers that entitle recipients to specific assets (eBooks, audiobooks, bundles).
Vouchers can be emailed to a recipient for self-redemption, or auto-redeemed against a specific user at creation time — useful when you're provisioning content as part of a purchase flow.
You'll need an API key from Snapplify. If you're on WordPress, the Snapplify Ecommerce plugin manages vouchers without any code.
API Reference
Full endpoint documentation: developer.snapplify.com → Snapplify Voucher API