From 2FA and OTP verification to billing reminders and feature announcements, SMSMaster gives SaaS and software teams in Sri Lanka a fast, reliable channel to reach every user.
Drop SMSMaster's API into your auth flow, billing system, or product notifications — and go live in minutes.
Sub-5-second one-time passwords for sign-up, login, and sensitive account actions.
Notify users of new logins, password resets, or suspicious account activity.
Notify subscribed users or on-call teams instantly when systems go down.
Reduce churn with renewal reminders and failed-payment alerts before cards decline.
Guide new users through setup with a short, well-timed SMS sequence.
Reach active users directly with new feature launches and product updates.
Set these up once as templates, then let SMSMaster trigger them automatically from your auth flow or billing system.
Confirms the phone number and activates the account.
Authenticates every login attempt on new devices.
Sent a few days before renewal to prevent lapsed subscriptions.
Recovers revenue before the account is suspended.
Keeps active users engaged with what's new.
Use our REST API to drop OTP, security alerts, and billing reminders straight into your existing auth and billing flows.
POST https://api.smsmaster.lk/v1/messages Authorization: Bearer sk_live_*** { "to": "+94771234567", "sender_id": "YourApp", "template": "otp_verify", "vars": { "otp": "738291", "expiry_minutes": "5" } }
Free trial credits included. No card required to get started.