Secure One-Time Password API with SMS

Secure One-Time Password (OTP) API with SMS

Elevate your security and two-factor authentification (2FA) measures with the Secure OTP API, now with seamless SMS integration.

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Trusted By Industry Leaders

A True Partner in SMS OTP (2FA) Security

At Raange, we set the bar high for SMS and OTP API’s services with an unwavering commitment to near-guaranteed deliverability, exceeding 90%. Our dedication to ensuring your two-factor authentication messages reach their destination sets us apart.

Just as Secure OTP API, when harmonized with our SMS API integration, fortifies your authentication process, Raange complements security with reliability. With us, you’re not merely receiving an OTP API; you’re investing in a solution that prioritizes your message delivery, providing top-notch protection alongside unmatched user-friendliness.

Talk to real people

Work with our team of experienced professionals

At Raange, actual people with experience in the industry are available to help you. Our team is always available to answer your questions, starting from the first day and onwards.

Work with our team of experts - sms api - raange
Affordable sms pricing - SMS API - Raange
reliable deliverability

Industry-leading delivery rates

Raange's SMS boasts industry-leading high reliability and delivery rates at over 90%, ensuring that your authentication tokens reach users when they need them most.

high volume tps

Tailor Your 2FA with SMS Messages to Millions

With these powerful customization tools at your disposal, you can ensure that your OTP messages are not only secure and compliant but also perfectly tailored to your unique requirements.

Millions of messages - SMS API - Raange

How It Works: Secure OTP API with SMS Integration

  1. User Initiation: Users begin the authentication process by entering their phone number or email.
  2. Token Generation: Secure OTP API generates a unique authentication token to secure the verification process.
  3. Token Delivery via SMS: The authentication token is delivered to the user via SMS, leveraging the reliability and near-instantaneous delivery of SMS.
  4. User Verification: Users input the received token into the application.
  5. Token Authentication: Secure OTP API verifies the token, ensuring a secure and hassle-free authentication process.
  6. Delivery Reports: System receives SMS delivery reports for transparency

Secure OTP API Features

Time-Based OTP

Generate unique passcodes at set intervals, enhancing protection against unauthorized access.

2FA Retries

OTP retries offer users additional convenience and peace of mind by allowing them a second chance to enter the correct code, reducing the risk of being locked out due to a mistyped or delayed response.

Enterprise Scalability

Ensure that your authentication system can effortlessly accommodate the growth of your user base, providing a secure and user-friendly experience for all.

Integration Assistance

Connect with our team of professionals to help you get started.

Code Lengths

Decide on the code length, ranging from 4 to 6 digits.

Delivery Reports

Allows you to monitor the status of your SMS messages in real-time, ensuring your messages reach their intended recipients effectively.

Our SMS API is Connected to All Major Carriers

Raange acts as a gateway to all carriers in Canada and US. This is why our transactions have a 97-98% conversion rate.

How to Get Started with Raange's Two-Factor Authentication and SMS API?

We make it super simple and easy to get started with our APIs. Here’s how you can start testing and sending today:

Schedule a Demo with Raange

Generate Authentification Token

Review Specific API Developer Docs

Run Tests

Talk to Our Team

Frequently Asked Questions Around SMS API

Below you’ll find some of the answers to the most frequent questions we get about our two-factor authentication and SMS APIs.

The cost of SMS API service depends on the volume of messages you plan to send. We support both SMS API in Canada and SMS API in the US. Please contact our team to discuss detailed pricing specific to your project. 

We have a quite a few APIs and Webhooks. Here are some of the most relevant for our customers:

Auth Token


Receive SMS Webhook

SMS Two Factor Authentification (2FA)

Find out more about our related APIs for generating short urls, QR codes and contact acquisition by setting up a call with our team. 



As long as you can make Json HTTP calls, we can support any programming language you want. 

Raange uses industry best practices to keep your systems secure:

   – Secure communications over HTTPS.
   – Authentication using api key and secret.
   – Authorization using signed Jwt tokens.

What our customers are saying...

“Raange is the most powerful vehicle we have right now to impact sales.”

Lisa Challis
VP Operations and Sales
“Raange mobile messaging solution has been very effective for us in acquiring customer data and the team at Raange has been an integral part of our mobile marketing strategy. ”

Geoff Matthews
Vice President
“Great customer service. It was a very personal experience – if there were issues they were dealt with in a quick efficient manner. It was great! Raange helped us to obtain contact information for our customers.”
Lorna Pierson
Director of Merchandising

Talk to One of Our Product Specialists Today!