OTP SMS API Kenya
Build secure one-time-password delivery
A production OTP SMS flow needs more than sending a code. It needs rate limits, expiry, delivery visibility, replay protection and a fallback plan for Kenyan mobile networks.
Last updated August 2026
Keep the OTP payload minimal, expire codes quickly and verify them server-side. SMS is a delivery channel—not the place to store secrets or business logic.
Before you start
Server-side code generation
Short expiry window and attempt limit
One-time consumption enforced in the database
Rate limiting by user, device and phone number
Delivery webhook and resend policy
Audit logging without storing full OTP values
How to do it in Kenya
A practical, compliance-aware walkthrough you can follow today.
Generate the code
Create a cryptographically secure random code on your server and store only a protected representation with its expiry.
Send the message
Call the SMS API from your backend with a clear sender ID and a short, localized message.
Verify once
Accept the code only within the expiry window and invalidate it immediately after successful verification.
Control retries
Limit resend frequency and attempts, and avoid sending multiple valid codes at the same time.
Monitor outcomes
Track delivered, failed, expired and verified states separately so you can diagnose drop-off.
OTP SMS API Kenya questions, answered.
The practical questions Kenyan organisations ask about otp sms api kenya, with straight answers and KES pricing where it applies.
Still have a question? Talk to us →SMS OTP can provide practical account verification, but sensitive systems should combine it with risk controls, device signals and stronger authentication where appropriate.
Related resources
Talk to our team about the fastest, compliant path for your organisation.