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OTP Authentication

BlockID one-time passcodes are a great way to add additional authentication to your login experience. Integration is simple using our SDK and only requires a few lines of code.

BlockID one-time passcodes work with all valid email addresses. Phone numbers from most countries are currently supported.

How it Works

As part of your sign-in process, users will receive an SMS message or an email containing a one-time passcode after entering their username and password.

Users will need to verify that one-time passcode on your application or website to complete their sign-in.
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One-Time Passcodes can be sent via SMS or Email.


  • BlockID SDK - installed and initialized with license key and tenant information.
  • Phone number or email address you wish to send the one-time passcode to.

See Getting Started for more information on installing and initializng the BlockID SDK.