What are two-factor authentication codes?

A two-factor authentication code, or otherwise referred to as OTP (one time password), is a secondary means of authentication required to get access to a user account. This is sent as a message to the number saved on the account, after the user logs in with their email and password.

How do I test and send a 2FA verification code?

First, create a 2FA profile; you’ll use this profile to send your 2FA codes and receive your responses. Secondly, to send the 2FA code, you need to input the phone number that will receive the message. Finally, the user will send the code they receive on their device back, and if it matches the code that your profile sent out, the verification was successful and the customer can access their account.

Will I be able to access Verify through the Mission Control Portal?

Yes. From the Telnyx Portal you can create a Verify profile and a verification code within the section of the portal.

How do I get started using the Verify API?

You can access the API in our Mission Control Portal and follow the simple steps under the Verify section.

What are the most popular use cases for two-factor authentication?

Most of our users implement two-factor authentication to improve the security on their customers’ accounts. 2FA helps achieve this goal by requiring users to provide another method of identity validation in addition to username and password.

How much does it cost to use Verify?

Check out our [pricing page](https://telnyx.com/pricing/verify-api) for more information.

How do I use Authy? Do you connect to it?

The Telnyx Verify API is an alternative to Authy and other authentication programs. We offer extremely competitive pricing and a simple interface that developers love.

Verify API

Q: What is two-factor authentication (2FA)?

Authentication is a means of verifying one’s identity, and [two-factor authentication (2FA)](https://en.wikipedia.org/wiki/Multi-factor_authentication) is a method of establishing access to an online destination by requiring users to provide two different types of information. One common mode of single-factor authentication is the username/password pair. With 2FA, users need to both provide a password and prove their identity in some other way to gain access. A common 2FA method is to send a time-sensitive one-time password to a mobile device via SMS in addition to username and password.

Create your own authentication program or build one into your existing product. Use a single phone verification API to reach users across all devices with OTP and more.

Talk to an Expert

Get started in the portal.

ABOUT

A two-factor authentication solution at a great price

Telnyx’s Verify API offers all the standard features of user authentication software, including OTP sent via SMS and voice as well as flash calling. It's super easy to use and, just like the rest of our platform, comes at a great price.

FEATURES

Simple two-factor authentication API

The Telnyx Verify API allows you to build your own authentication program using one easy API for SMS, voice and even flash calling.

Reliable authentication
Reliable infrastructure for scalable 2FA delivery to your users in over 190 country codes.
Analytics
Client based DLRs give detailed insight into how customers interact with your two-factor authentication tools.
Flash call
Our API allows automatic interception of 2FA codes when customers accept an incoming flash call.

BENEFITS

Developer-friendly, scalable API

Among CPaaS providers, Telnyx consistently wins awards for its results and ease-of-use. We take care of the details as you scale, so you don’t have to.

Ranked CPaaS for Results and Ease of Use

A global 2FA solution

Our Verify API can interact with your end users all around the world.

190+

Country codes supported

HOW IT WORKS

RESOURCES

Start verifying

Our code is your code.

curl -X POST \
  --header "Content-Type: application/json" \
  --header "Accept: application/json" \
  --header "Authorization: Bearer YOUR_API_KEY" \
  --data '{"name":"Test Profile","default_timeout_secs":300,"messaging_enabled":true}' \
  https://api.telnyx.com/v2/verify_profiles

Build with an authentication API
Configuration guides help you quickly add an authentication service to your app using SMS, Voice, Flash Call and/or WhatsApp.
Explore docs
Why 2FA?
If you're worried about protecting your sensitive and personal information, learn how two-factor authentication can help.
Read article
What is two-factor authentication?
We dive into how two-factor authentication works to add an extra layer of security, the different types of 2FA and more.
Read article

PRICING

See our Verify API pricing

Customers typically save 30% by switching to Telnyx, with lower list pricing and automatic volume discounts.

Starting at:

$0.03

per verification

See pricing

SOLUTIONS

2FA for multiple applications

Sign up and start building

FAQ

Authentication is a means of verifying one’s identity, and two-factor authentication (2FA) is a method of establishing access to an online destination by requiring users to provide two different types of information. One common mode of single-factor authentication is the username/password pair. With 2FA, users need to both provide a password and prove their identity in some other way to gain access. A common 2FA method is to send a time-sensitive one-time password to a mobile device via SMS in addition to username and password.

Resources, Docs, Support

Verify Api hub

Telnyx Verify API | Telnyx
API Documentation for Verify
Read more
Telnyx Verify Quickstart | Telnyx
Telnyx Verify helps to deliver a 2FA token to any mobile number and verify that token using Telnyx V2 API
Read more
Account Setup | Telnyx
Outlines the process of setting up a Telnyx account.
Read more
Account | Telnyx
The Account API allows users to manage addresses and billing info associated with their account.
Read more
Get started now! | Telnyx
Welcome to Telnyx! This quickstart is designed to get you started right away with creating your account and using the developer portal to do some common actions. You will:
Read more
Trigger SMS verification API | Telnyx
Trigger SMS verification
Read more
Trigger Call verification API | Telnyx
Trigger Call verification
Read more
Create a Verify profile API | Telnyx
Creates a new Verify profile to associate verifications with.
Read more
List verifications by phone number API | Telnyx
List verifications by phone number
Read more
Verify verification code by phone number API | Telnyx
Verify verification code by phone number
Read more
Telnyx Blog | CPaas & UCaaS Resources
Find data-driven research, comprehensive guides and all things SIP trunking, voice and SMS APIs, wireless and more.
Read more
How does a verify API protect your business and customers?
Secure your business with a verify API to protect data, build trust, and ensure compliance. Learn what features to look for when choosing a verify API.
Read more
Telnyx Verify: Delivering 2FA at Scale
Verify API Launch -- Empowering businesses to enable robust security features through reliable two-factor authentication.
Read more
2FA codes with Verify API and Python SDK
Learn how to send 2FA codes with Verify API and Python SDK in this webinar recording
Read more
How to choose the best 2FA solution for fraud prevention
We’ve compared the best 2FA fraud prevention solutions so you don’t have to. Learn about top features, pricing, and ease of use.
Read more
2FA vs. MFA: Which verification strategy is right for you?
Finding the right authentication method for your business will protect sensitive data and comply with regulations. Learn how to choose between 2FA vs. MFA.
Read more
Ensure account integrity with reliable verification methods
Learn how reliable verification methods like passwords and 2FA can help you maintain account integrity, enhance security, and protect your data and users.
Read more
Just How Secure is Two-Factor Authentication?
So, just how secure is two-factor authentication? 2FA is one of the safest ways to protect your sensitive and personal information and users, here's how.
Read more
What is 2FA? Complete guide to two-factor authentication
Learn about two-factor authentication’s role in cybersecurity, how it works, and how you can implement 2FA for your business.
Read more
Top 5 Twilio Verify API alternatives
Looking for the best verification API for your business? Don’t just default to Twilio Verify API. Consider some of these great options instead.
Read more
Top 5 Twilio Verify API alternatives
Looking for the best verification API for your business? Don’t just default to Twilio Verify API. Consider some of these great options instead.
Read more
The Better Twilio Alternative - Telnyx
Switch to Telnyx for a better Twilio alternative. Benefit from our competitive pricing, private global network, and award-winning support.
Read more
Introducing the Verify API | Telnyx Help Center
This article will explain how to set up Verify API to utilize within the Telnyx Portal.
Read more
Telnyx Verify: 2FA made easy | Telnyx Help Center
This article describes what is and how to get started with Telnyx Verify
Read more
Telnyx Identity & Verification Tools | Telnyx Help Center
A comprehensive list on how to navigate various Telnyx Identity and verification tools.
Read more
API Keys and How to Use Them | Telnyx Help Center
In this article we will explain API keys and how to use them with both API v2 and API v1.
Read more
Getting Started | Telnyx Help Center
Get Started with a Mission Control Account. Start building on Telnyx today.
Read more
Telnyx SMS Guide | Telnyx Help Center
Here you will find a collection of links that will explain how to build applications using our SMS offering.
Read more
Two Factor Authentication [Use Cases]
Implement Telnyx's Two-Factor Authentication to safeguard user data. Check out our real-world use cases.
Read more
SMS API | Built for CRM and Sales
Enhance your CRM tool with our SMS API. Build customer relationships seamlessly while ensuring compliance with data and privacy restrictions.
Read more

Verify API

Reliable authentication

Analytics

Flash call

BENEFITS

Developer-friendly, scalable API

Ranked CPaaS for Results and Ease of Use

A global 2FA solution

Country codes supported

Set up your 2FA profile

Choose verification method

Verify user’s inputted code

Pass to the next stage

Build with an authentication API

Why 2FA?

What is two-factor authentication?

See our Verify API pricing

2FA for multiple applications

Financial services

Healthcare

Retail and eCommerce

Sign up and start building

FAQ

What is two-factor authentication (2FA)?

What are two-factor authentication codes?

How do I test and send a 2FA verification code?

Will I be able to access Verify through the Mission Control Portal?

How do I get started using the Verify API?

What are the most popular use cases for two-factor authentication?

How much does it cost to use Verify?

How do I use Authy? Do you connect to it?

Telnyx Verify API | Telnyx

Telnyx Verify Quickstart | Telnyx

Account Setup | Telnyx

Account | Telnyx

Get started now! | Telnyx

Trigger SMS verification API | Telnyx

Trigger Call verification API | Telnyx

Create a Verify profile API | Telnyx

List verifications by phone number API | Telnyx

Verify verification code by phone number API | Telnyx

Telnyx Blog | CPaas & UCaaS Resources

How does a verify API protect your business and customers?

Telnyx Verify: Delivering 2FA at Scale

2FA codes with Verify API and Python SDK

How to choose the best 2FA solution for fraud prevention

2FA vs. MFA: Which verification strategy is right for you?

Ensure account integrity with reliable verification methods

Just How Secure is Two-Factor Authentication?

What is 2FA? Complete guide to two-factor authentication

Top 5 Twilio Verify API alternatives

Top 5 Twilio Verify API alternatives

The Better Twilio Alternative - Telnyx

Introducing the Verify API | Telnyx Help Center

Telnyx Verify: 2FA made easy | Telnyx Help Center

Telnyx Identity & Verification Tools | Telnyx Help Center

API Keys and How to Use Them | Telnyx Help Center

Getting Started | Telnyx Help Center

Telnyx SMS Guide | Telnyx Help Center

Two Factor Authentication [Use Cases]

SMS API | Built for CRM and Sales