One Time Password

Send, protect, validate - with OTP via SMS

What is SMS OTP?

An SMS OTP (one-time password) is a secure authorisation method where a numeric or alphanumeric code is sent to a mobile number. This password is an added layer of security used to verify a user’s identity when logging in online or confirming an action.

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More than just an authentication method

Secure SMS communication Secure Customer Data

Implementing an SMS OTP on your website, software or app will add another level to your security, substantially decreasing the vulnerability of your customer’s data and information.

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SMS surveys Increase Customer Satisfaction

Providing your customers with the option to use an SMS one-time password shows that your business takes their data security seriously.

Pay per password Pay Per Password

No logins for a while? No worries. Pay only for the SMS that you send. As your SMS grow in volume, your SMS rates reduce. View our wholesale SMS pricing here.

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Scalable SMS gateway Enterprise Scalability

Our SMS gateway is built to deliver large volumes of messages in a timely manner. Talk to one of our SMS specialists today to learn more about enterprise SMS OTP services.

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Technical support Integration Assistance

First time implementing an SMS OTP system? Talk to one of our integration specialists. Or, if you're confident in building yourself, check out our OTP API documentation for in-depth integration information.

SMS security More secure than email

An SMS OTP is much more secure than an email OTP. If a potential hacker has email and password information for the login of an online platform or app, they likely have access to the connected email address as well.

SMS Retriever API OTP SMS Retriever API

Reduce the steps in the already simplified SMS OTP process by enabling a Retriever API. This will allow your mobile app to automatically copy and paste the token code once received by the mobile. Read more about the OTP SMS Retriever here.

GDPR friendly A GDPR Favourite

The added layer of security offered by an SMS OTP can push your business towards, or extend, your level of GDPR compliance. Implementing an SMS OTP process illustrates how seriously you take the protection of your customer’s data.

Extra security for data protection and online safety

Why implement SMS OTP

When someone shares their personal and sensitive information with your business, they expect you to protect this data from possible hackers. Two-factor authentication adds an extra layer of security to the login procedure, drastically improving the security of a website, application or software.

  • Australian-based servers and data centre Australian-based servers and data centre
  • Premium SMS messaging routes Premium SMS messaging routes
  • Bulletproof security and GDPR compliance Bulletproof security and GDPR compliance
  • Enterprise scalability with easy API configuration Enterprise scalability with easy API configuration
Customise SMS OTP Messages

Send custom OTP codes with high throughput

Craft your OTP message to compliance perfection. OTP customisation features ensure your recipients know where the message is coming from and allow you to determine the safety parameters for your 2FA.

  • Australian-based servers and data centre Curate OTP message content with {*code*} placeholder
  • Premium SMS messaging routes Determine code length from 4 to 10 digits
  • Bulletproof security and GDPR compliance Set code expiry time between 60 to 600 seconds
  • Enterprise scalability with easy API configuration Custom Sender ID for origin address
Send and Validate with SMS OTP Codes

Integrate our powerful SMS OTP API into your software

Using SMSGlobal’s REST API, you can easily integrate OTP into existing systems. Our robust integration includes customisation, code validation, and specific expiry times.

  • Australian-based servers and data centre Set message expiry time for when a code becomes invalid or expires
  • Premium SMS messaging routes The latest code is the only valid OTP per destination number per API key
  • Bulletproof security and GDPR compliance Validate or cancel OTP requests when necessary
Software Developer Kits for SMS One-Time-Password

Build your own SMS OTP solution with SDKs

Utilise our SDKs to integrate a strong SMS OTP solution into your systems. With Unicode and other languages supported, simply navigate REST API documentation with ease.

For Developers
.NET SDK Client library for .NET applications

This SDK library supports .NET applications written in C#, VB.Net, and F# that utilise .NET Standard 2.1 enabling SMS and opt out capabilities.

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PHP SDK PHP Client library

This ready-to-use PHP Client library for SMSGlobal’s REST API allows developers to integrate SMS functionality into PHP applications.

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NodeJS SDK SMSGlobal Node library

SMSGlobal’s Node library provides convenient and secure usage of SMSGlobal’s REST API for your node application.

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How to generate and validate OTP

Step 01 - User requests OTP online which is generated by the API.

Step 01

User requests OTP online which is generated by the API.

Step 02 - Sent via SMS, the user then enters the passcode online.

Step 02

Sent via SMS, the user then enters the passcode online.

Step 03 - SMSGlobal OTP API verifies the code and determines access.

Step 03

SMSGlobal OTP API verifies the code and determines access.

How the OTP API works