Verify API
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.
Get started in the portal.
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.
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.
#1
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
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_profilesBuild with an authentication API
Configuration guides help you quickly add an authentication service to your app using SMS, Voice, Flash Call and/or WhatsApp.
Why 2FA?
If you're worried about protecting your sensitive and personal information, learn how two-factor authentication can help.
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.
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 verificationSOLUTIONS
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.