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

• 3D-Secure
  The 3D-Secure security protocol provides an additional layer of security for online card transactions. Nuvei supports 3D-Secure v2 (3DS2).
• Non-3D-Secure
  For some cases, when the merchant wants to process a transaction without 3D-Secure.
• 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.