Nuvei REST API 2.0 supports the following card flows and operations:

• Payment (Non-3DS)
  When you want to process a transaction without 3D Secure (3DS).
• Payment (3DS)
  The 3DS security protocol provides an additional layer of security for online card transactions. Nuvei supports 3D Secure v2 (3DS2).
• Card-on-File
  Customers authorize the merchant or Nuvei to store payment method details for use in future transactions.
• Zero-Authorization
  A merchant sends a zero-authorization request when storing card details for future use, adding a card, or verifying a card.
• Merchant-Initiated Transactions (MIT)
  A merchant initiates a transaction using a customer’s stored credentials, with the customer’s prior consent.