OTP (One-Time Password)

ReSMS provides a simple and secure way to implement One-Time Password (OTP) authentication in your applications. The OTP service allows you to send verification codes via SMS and verify them programmatically.

What is OTP?

OTP (One-Time Password) is a security feature that generates a unique code for each authentication attempt. It is commonly used to verify user identity during login, account creation, or sensitive transactions. OTPs enhance security by ensuring that even if a password is compromised, the attacker cannot access the account without the OTP sent to the user’s phone.

Key Benefits

• Enhanced Security: OTPs provide an additional layer of security beyond traditional passwords.
• Real-time Verification: Quickly verify OTPs to ensure user actions are secure and authenticated.
• Global Reach: Send OTPs to users worldwide with high deliverability rates.

Visualise OTP

Go to ReSMS dashboard  to visualize the OTP flow in your application.

In this tab, you can view their status and revoke them.

Overview

The OTP service consists of two main operations:

• Send: Generate and send a verification code to a phone number
• Verify: Validate a verification code entered by the user

Usage with ReSMS SDK

To use the OTP service, you need to have the ReSMS SDK installed for your programming language.

Have feedback, found a bug, or want to suggest a feature?

• Open an issue on GitHub 
• Or chat with us directly on Discord  — we’re happy to help!