SMSFORALLGenerate and protect the code.
Create short-lived codes in your application. Apply retry limits, expiration and abuse controls before calling the messaging API.
Home / Security & OTP
Security & OTPSupport your sign-in flow
with OTP SMS.
Connect your application to the SMS API to deliver verification codes. Your application remains responsible for generating, validating and expiring each code.
Keep verification clear.
Identify your service and state the purpose of the code. Avoid mixing a verification message with promotional content.
Test the destination.
Discuss OTP traffic separately from marketing. Confirm sender rules, route suitability and delivery reporting for the countries you serve.
Before you send
Your questions, answered.
Does SMSFORALL generate the OTP?
The documented Single SMS Send API sends message content you provide. Your application generates and validates the OTP unless a separate service is agreed.
Is a delivery time guaranteed?
No delivery-time guarantee is stated here. Discuss your requirements, route conditions and testing with the team.
Can SMS replace every security factor?
Your security design should assess the risks and requirements of your application. SMS is a communication channel, not a complete authentication system.
Let’s find the right route for your traffic.
Share your destination, use case and monthly volume. We’ll discuss the next steps.