Visa Biometric Authenticator App is a white-label, turnkey mobile app solution offered to Issuers. The solution allows cardholders to verify their high-risk e-commerce transactions, using device biometric authentication, securely and conveniently within the mobile app. An important component of this solution is the Visa Biometric Authenticator App API. The Issuer’s Access Control Server (ACS) provider needs to integrate with this VBAA API to route the requests for two-factor authentication to the Visa Biometric Authenticator App and to receive the result. Visa may enhance the solution in the future to support other consumer authentication scenarios.