Send Two-Factor Authentication SMS

Authenticate users via text messages, secure low-level transactions, and add an extra layer of security to your software with SMS two-factor authentication (2FA).

Secure Your Software with 2FA

Onboard users securely and validate logins globally with two-factor authentication texts.

Generate OTPs Instantly

Integrate our text message API into your software and generate SMS one-time passwords automatically.

Enable Passwordless Login

Link phone numbers to your users and provide them with a passwordless login experience.

Two-factor authentication

Improve Security with SMS Two-factor Authentication

Verify your customers and protect against fraud with SMS 2FA.

Protect From Fraud

SMS two-factor authentication adds an extra level of security and discourages hackers and fraudsters from using your system.

Usable in Multiple Industries

Banking services, e-commerce, software providers, apps, and medical systems all use SMS 2FA and one-time passwords.

Smartphones Are Not Required

Only one-third of the world’s population has a smartphone. You can send SMS 2FA to any mobile device, even the older ones.

Perfect for Global Businesses

SMS two-factor authentication codes can be sent globally to more than 190 countries using the TextMagic API gateway.

Verify Low-value Transactions

SMS two-factor authentication works very well with low-value transactions and logins to ensure it is the genuine person performing the action.

Protect Your Business

We care about your security. Our services are encrypted with SSL, backed up 24/7, and stored in secure locations with limited physical access.


How Mobile Two-factor Authentication Works

It’s easy for businesses to add an extra layer of security to their apps in the form of 2FA.

 1. Make an API call

Your server makes an API call to the TextMagic endpoint and passes the destination number that should be verified with 2FA.

 2. Receive a Security Code

The user with the destination phone number will receive a one-time verification code that will be used to complete the verification.

 3. Validate the Security Code

A user will enter the code into a form in your app and you will pass the code to TextMagic via API. We will then send back the result.

Frequently Asked Questions

Here, you can find the most popular answers about 2FA.

No security measure is perfect. SMS 2FA is no exception. Before we discuss the weaknesses of two-factor authentication, it is essential to note that the vast majority of users don’t use any security measures whatsoever. For example, 90 percent of Gmail users are not actively using 2FA.

App-based two-factor authentication is considered superior to SMS-based authentication. However, using SMS 2FA is a lot better than not using any protection at all. That’s because hackers will have to spend more time trying to bypass your systems.

A one-time password (OTP) is a mechanism through which the TextMagic API generates a single-use password that is linked to the user’s phone number. This mechanism is crucial for 2FA.

Many service providers, including Google, mobile banking systems, and payment processors, use OTP SMS to prevent identity theft and secure transactions.

Before you can start sending 2FA SMS, you must integrate the TextMagic API with your software. Everything you need to know about the 2FA system is available in our API documentation. This includes parameters and rules for sending and checking verification codes. 

    How does TextMagic perform two-factor authentication via SMS?

    The verification workflow is simple. Our API sends a PIN code via SMS. If there is no answer, it will follow up with voice calls. Here is the step-by-step workflow:

    • Send SMS OTP to the user. Wait 60 seconds.

    • IF the code is not provided, follow up with the first text-to-speech voice call. Wait 60 seconds.

    • IF the code is not provided, follow up with the second text-to-speech. Wait for verification.

    • The verification code can be used within five minutes of the initial request, after which it becomes invalid.

    Important: users must wait five minutes for the initial code to expire before they can request a new one.


    Thousands of Small Businesses Are Already Using TextMagic