OTP
One-time passcodes that just work
Issue and verify short-lived codes over SMS, WhatsApp, voice, and email — with a single call and consistent attempt handling.
Why Katembe OTP
Verification without the boilerplate
Multi-channel
Deliver codes over SMS, WhatsApp, voice, or email from a single endpoint with automatic fallback.
Configurable policy
Set expiry windows, attempt limits, and retry rules per use case — no custom code required.
Built-in analytics
See conversion, latency, and channel performance in one dashboard alongside your messaging traffic.
Fraud-aware
Risk signals from the verification API help block automated abuse before it costs you.
Send
Generate and deliver in one call
POST to one endpoint and Katembe handles code generation, delivery, expiry, and rate limiting. Use your own template or ours.
Read the verification docsVerify
Confirm the response in one call
Submit the code your user entered and Katembe returns approved, expired, or invalid — with full attempt history available via the API.
Explore the APIDeveloper-first
Verify users in two requests
Send the code with one request, verify the response with another. No state to manage on your side.
curl -X POST https://api.katembe.io/v1/verifications/otp \
-H "Authorization: Bearer <api_key>" \
-d "to=+258840000000" \
-d "channel=sms"
"Katembe OTP replaced a homegrown verification stack we'd been patching for three years. We launched the new flow in a sprint and our checkout conversion went up."
Pricing
Verification pricing that scales with you
Pay per successful verification. Multi-channel routing included at no extra cost.