OTP SMS India — Secure 2FA
Delivered in Under 3 Seconds
BookMySMS OTP SMS service delivers one-time passwords to all Indian networks with sub-3-second speed and 99.9% uptime. Protect your users with bulletproof two-factor authentication for login, transactions, account activation and password reset — without any technical complexity.
Delivery Speed
SLA Guaranteed
Coverage
Airtel, Jio, Vi, BSNL
A security layer every online business needs
OTP SMS (One-Time Password) is a security service that delivers a unique, time-limited numeric code to a user's registered mobile number. It adds a second layer of verification — ensuring that only the legitimate user can complete a login, transaction or account action.
Because OTP SMS falls under TRAI's transactional category, it can be delivered to DND-registered numbers 24×7 with no time restrictions — making it the most reliable authentication method for Indian businesses with large user bases.
Every authentication scenario covered
From user login to high-value financial transactions — BookMySMS OTP SMS secures every critical step in your customer journey.
Secure Login (2FA)
Add two-factor authentication to your login flow — users verify their identity with an OTP on every new device or suspicious login attempt.
Account Activation
Verify the mobile number of new users during registration — ensuring only genuine, reachable users activate accounts on your platform.
Purchase Confirmation
Add an OTP verification step before processing high-value orders or payments — protecting customers from unauthorised transactions.
Password Reset
Replace insecure email-based password resets with SMS OTP — faster, more reliable, and accessible even to users who can't access their email.
Two-Factor Authentication
Combine password login with SMS OTP for true 2FA — the industry standard for protecting user accounts from phishing and credential theft attacks.
KYC & Identity Verification
Verify customer identity during onboarding for fintech, banking, insurance and regulated industries — TRAI-compliant and RBI-recommended.
Built for speed, security and scale
Our OTP infrastructure is purpose-built for authentication workloads — separate from bulk SMS, with dedicated routes, priority delivery and 99.9% uptime SLA.
Dedicated OTP Routes
OTP messages run on separate, priority carrier routes — completely isolated from bulk SMS traffic to guarantee sub-3-second delivery even during peak hours.
Auto-Retry Logic
If delivery fails on the first attempt due to network congestion, our system automatically retries via alternate routes within milliseconds — ensuring near-100% delivery.
Configurable Expiry
Set OTP validity from 1 minute to 60 minutes via API parameter. Shorter windows for high-security transactions, longer for less time-sensitive verifications.
Generate OTP via API
Pass just a mobile number and our API generates, sends and tracks the OTP for you. Or generate your own code and pass it — full flexibility for your architecture.
Real-Time Delivery Reports
Track every OTP delivery status — Pending, Delivered, Failed, Expired — in real time via dashboard or webhook. Operator-level diagnostics included.
Anti-Fraud Safeguards
Built-in rate limiting per mobile number prevents OTP flooding attacks. Configurable daily limits, cooldown periods and suspicious-activity alerts protect your users.
Integrate OTP SMS in under 30 minutes
Our OTP API is designed for rapid integration — most developers have a working implementation in under an hour with our documentation and sandbox environment.
Get Your API Key
Create a BookMySMS account, complete KYC and receive your API key instantly. DLT registration handled by our team within 24 hours.
Register Sender ID & Template
Register your 6-character Sender ID (e.g. BMSOTPX) and OTP message template on the DLT portal. We guide you step by step.
Test in Sandbox
Use our dedicated sandbox environment to test your OTP flow end-to-end without consuming credits or sending real messages.
Go Live
Switch to production, set your delivery webhook, and your OTP service is live — serving real users with enterprise-grade reliability.
Send, verify & track OTPs with one clean API
Our OTP API has three endpoints — Send, Verify and Status. Send the OTP, let users enter it, verify with one call. Clean, stateless, and framework-agnostic. Works with PHP, Python, Node.js, Java, .NET and any language with HTTP support.
Send OTP
One call — pass mobile number, get OTP sent. We generate the code, you just trigger it.
Verify OTP
Pass the OTP the user entered — we validate it and return verified/failed/expired status instantly.
Resend OTP
Allow users to resend without calling your backend — built-in cooldown prevents abuse.
Delivery Status
Poll or receive webhook for real-time delivery status — operator, timestamp, latency per OTP.
OTP SMS trusted across every industry
Any business that handles user accounts, online payments or sensitive data needs OTP authentication. BookMySMS secures them all.
More from BookMySMS
Businesses securing user authentication with BookMySMS OTP
Secure your users with fast,
reliable OTP authentication today
Get API access in minutes — no setup fee, no lock-in. Our team handles DLT registration, Sender ID setup and template approval. Sub-3-second OTPs start landing on your users' phones the same day.