Tyntec 2FA enables phone number authorization by integrating one-time passcodes via SMS or voice. The API supports auto-detection of mobile or landline phones, and language customization. The API is REST-based with API Keys for authentication. Tyntec is a platform dedicated to connect businesses, customers, and employees by using a range of mobile channels and devices. Tyntec supports messaging, voice calling, and authentication to safeguard transactions.