Auth API

Auth API is a simple, secured, and reliable way to easily add SMS OTP authentication to your app with your own branding.

How To

FullSMS Auth API allows implementing SMS OTP in any app using only two API calls (Create & Validate) and works as follows:

1. A user registers via your app or web site and provides a phone number.
2. Your app makes an API call to the Auth API to the Create endpoint (First API call). This will generate an ‘OTP_ID’.
3. FullSMS Auth API generates a Code and attempts to deliver it to the user. The length of the code consists of 4/6 digits and can be configured in the Settings, under the “API” tab.
4. The user receives the Code and enters it into your app.
5. Your app makes an API call to the Auth API Validate endpoint (second API call) with the ‘CODE‘ the user entered and the ‘OTP_ID’.
6. The Auth API checks that the Code entered matches the one that was sent and returns the result to your app.

For more details on how to implement FullSMS Auth API, checkout our API Documentation.

You can view real time detailed report on each validation created and checked in the Auth API Log