Two-Factor Authentication API
Verify users by reaching their mobile device with SMS, voice codes, email, WhatsApp, and more: easily adding a layer of security with Vonage Verify API.
Thanks for reaching out!
A Vonage expert will get back to you shortly. In the meantime, feel free to explore the new Vonage and how we're making communications more flexible, intelligent, and personal so our customers can stay ahead.
Vonage Verify API: Everything You Need From a 2FA API
Vonage Verify API for 2FA helps you build trust, protect against fraud, and let you get on running your business with peace of mind. Whether your customers are limited to one region or spread around the world,Vonage Verify API is:
Complete
A single API provides the full 2FA solution, from authentication management to message automation, spanning SMS, voice, email, WhatsApp and Silent Authentication.
Simple
Just give us a phone number and we’ll take care of the rest. We generate the codes, localize, use the fastest channel available, even fall back to SMS or voice when needed.
Convenient
Unlike other 2FA methods that may require special hardware or an authenticator app, our solution works with any phone number.
Flexibly-Priced
Pay only for successful verifications.How Vonage Verify API Works For Two-Factor Authentications
Vonage Verify API makes it easy to add an extra layer of security to your site or application — without added friction for users trying to log in. Here’s how API two-factor authentication works in just four simple steps:
Intercept the Login
A user logging into an account first confirms their username and password, but to be certain that the user is who they say they are, our Verify API gets involved.
Vonage Verify API Reaches Out
We send a one-time code — via SMS, voice, email, or WhatsApp — to the phone associated with that username and password.
The Account Owner Confirms
When the code arrives on the phone belonging to the user associated with the account, the owner keys in the short verification code into the input box presented by the app.
Allow Account Access
Your app verifies that the entered code matches the code that was sent, confirming that the person attempting to access the account has the phone linked to that account. Your app can then give full access to the user.
Why You Don’t Want To Build a Two-Factor Authentication SMS API Solution From Scratch
It may all sound pretty simple so far, and it is — with Vonage Verify API. If you want to build and implement your own 2FA SMS API solution from scratch, though, you have to consider all the following:
Application Complexity
Building a 2FA mechanism from the ground up is hard. There’s much more to 2FA than sending messages. You have to generate, store, and expire secure codes, as well as design and build a system to relate user identities to devices.
One Channel Is Not Enough
Once you’ve obtained a user’s phone number, you want to be able to verify them, no matter the line type. This means you have to first detect the line type (mobile or landline), and then deliver a message via either SMS or voice, depending on the type of device.
Deliverability Is Critical
Because the user is in the process of logging in, timeliness of message delivery is critical. Your 2FA solution falls apart if you can’t get the required code to the user within a few seconds.
Development Cost
To bring 2FA to your mobile app, you may also have to design and build the UI for each device, increasing development time and expense.Why choose Vonage Verify as Your 2-Factor Verification API?
Want to avoid all the challenges and issues outlined above? That’s precisely what you can do by choosing Vonage Verify API as your 2-factor verification API. With it, you get:
A Comprehensive Solution
We designed the Verify API to make it simple to implement. Your application simply gives us a phone number and we take care of the rest. We’ve got you covered with SMS, voice, WhatsApp, Email, and Silent Authentication with automatic failover. We even make sure the messages comply with local regulations so they are not filtered by the carriers. Our comprehensive backend provides the secure code and identity management capabilities, all behind a simple to use API.
Highest Deliverability
Our many direct-to-carrier relationships around the world, combined with our proprietary Adaptive Routing algorithm, allow us to work in real-time to find the best routes for your messages. Add to that our Compliance Engine, which knows how and when to deliver messages according to country and carrier requirements, and you have the industry’s highest deliverability rates.
Simple and Affordable Pricing
We priced Verify in the way that makes the most sense to you and is easy to ROI -- you pay only one flat fee for successful conversions.
Pre-Built User Experience
The Verify SDK for mobile apps includes a customizable user experience framework that lets you build the 2FA UI into your app very quickly. You can implement cross-device logins and specify expiry times to re-authenticate users without building a complex authentication back-end."We would not be able to achieve virality without a reliable, scalable phone number authentication solution, and we would not have been able to do that without [Vonage APIs] and the Verify API."
Other Solutions Related To 2FA APIs
Replace static passwords with single use codes.
Two-Factor Authentication API FAQs
Two-factor authentication — also known as 2-factor authentication or 2FA — is a digital security method that requires two means of identification. Typically, 2FA is needed for things like logging in to websites or apps, making payments, and more.
The two factors in question are typically a password and then a unique code, sent to a known contact number, email address, or other account associated with the user. Both must be provided correctly to allow the user to complete the action they’re attempting.
One of the most common examples of 2FA authentication in day-to-day life is when you log in to your online bank’s website or app. In that case, you will need to input your username and a password or passcode.
Then, you’ll typically get sent a further 2FA code, typically via SMS, to a number you’ve already registered with the bank. You have to enter that code, too, before betting access to your account. This is so that only someone who both knows your password and has access to your phone — i.e., you — can log in.
The principal benefit of two-factor authentication is that it adds an extra layer of security to any site or application. It does so by reducing the risk posed by insecure or otherwise compromised passwords. That’s the case, as even if someone guesses or steals your password, they still can’t use it to successfully login or perform actions that need 2FA.
Additional, related benefits include that it can help businesses demonstrate to customers — and, potentially, regulatory bodies — that they take cybersecurity seriously. That’s incredibly important in an era of increased understanding of the dangers of data breaches and cyberattacks.
A two-factor authentication API is an Application Programming Interface that helps businesses to integrate 2FA into their applications. That way, your customers will receive 2FA codes by SMS — or voice, WhatsApp, or email, too, with Verify API — for a more secure way to log in to your app. Using a 2FA API like Verify means you don’t have to build the 2FA solution from scratch, which is very time-, resource-, and expertise- intensive.
The price of two-factor authentication APIs will depend on the provider. For example, there are two Vonage Verify API pricing plans that you can choose from. You can, however, also try coding your 2FA API solution for free.
