otpbase is a simple API to send and verify one-time codes over SMS and email. Add phone verification, passwordless login and two-factor auth to your product without building it yourself.
Code generation, delivery, expiry and rate limiting are handled for you. You call two endpoints.
Send codes to phone numbers or inboxes through one API, and pick the channel per request.
Codes go out the moment you call the API, so users aren't left waiting on the login screen.
Codes expire automatically, can only be used once, and repeated failed attempts are blocked.
A clean REST API with clear errors. Works with any language or framework.
See which codes were sent, delivered and verified, so you can spot problems early.
Use your brand name and your own wording in every message you send.
No telecom contracts, no code storage, no cron jobs to clean up expired codes.
Contact us and we'll set up your account and your API key.
Call send with a phone number or email. We generate and deliver the code.
Call verify with what the user typed. You get back a simple yes or no.
From the first sign-up to sensitive account actions.
Close to the markets we serve across the Middle East and Southeast Asia.
Want to add OTP verification to your product? Tell us what you're building and we'll get back to you.
Contact us → contact@otpbase.net