Trusted by 5,000+ businesses across India. Our Transactional SMS Service delivers OTPs in under 6 seconds with a free API, 99.9% uptime, and pricing that actually makes sense. No credit card needed to get started.
Every time a user logs in, makes a payment, or activates an account on your platform, they're waiting for that one SMS. If it doesn't arrive instantly, you lose them. That's the problem we solve.
MetaReach runs a dedicated OTP SMS gateway with direct SMPP connections to Airtel, Jio, and Vi so your OTPs are never queued behind promotional traffic. We handle DLT Registration, sender ID setup, and template approvals so your team can focus on building, not compliance.
From startup apps running a few hundred OTPs a day to enterprise platforms sending millions a month, our infrastructure scales with you. Beyond OTP, our platform also powers Bulk SMS Service, Transactional SMS Service, WhatsApp Business API, and RCS Messaging all from a single account.
OTP SMS is an auto-generated one-time code sent to a user's mobile to verify their identity. It expires after a single use — far more secure than static passwords for login verification, transaction approval, and account security.
OTP SMS powers 2FA, user verification, and payment flows across banking, fintech, e-commerce, and healthcare in India. As a DLT-approved OTP SMS service provider, MetaReach delivers instant OTP SMS on dedicated routes — bypassing DND, sub-5 second delivery, 99.9% uptime.
A randomly generated code that expires after a single use or a fixed time window. Cannot be reused making it fundamentally more secure than static passwords for any login verification flow.
Two-Factor Authentication (2FA) combines something the user knows (password) with something they own (their phone). 2FA SMS API is the most widely adopted second factor across Indian banking and fintech.
The user provides their mobile number, receives an instant OTP SMS, enters it on-screen, and the system confirms identity in seconds. Works seamlessly within any registration, login, or payment flow.
Secure OTP delivery ensures login attempts and payment approvals are authorised by the actual account holder blocking unauthorised access and significantly reducing fraud exposure for businesses.
From the moment a user requests a code to the instant they are authenticated here is exactly how instant OTP SMS works through MetaReach's secure OTP delivery infrastructure, powering banking OTP SMS, fintech OTP API, and e-commerce verification across India.
The user enters their registered mobile number on your login, payment, or registration screen to trigger the OTP SMS verification.
Your backend generates a cryptographically random one-time password typically 6 digits valid for a configurable expiry window.
Your system calls the MetaReach OTP SMS API (REST or SMPP) with the mobile number, DLT template, and entity IDs. API acknowledges in under 200ms.
MetaReach routes the mobile verification SMS via dedicated DLT-approved transactional paths direct connections to Airtel, Jio, Vi, and BSNL delivering in 6 seconds.
The user enters the OTP. Your system validates it authentication is complete. A delivery webhook confirms secure OTP delivery in real time.
From fraud prevention and instant authentication to customer trust and secure login here's what actually matters when choosing a mobile verification service, and what sets MetaReach apart from generic SMS aggregators.
OTP SMS fraud prevention ensures only the account holder can approve a login or transaction. This secure login layer blocks most account takeover attempts especially critical for banking OTP SMS, fintech authentication, and healthcare platforms handling sensitive data.
Instant OTP SMS via dedicated transactional routes means your transaction approval SMS is separate from promotional traffic. Average delivery is 6 seconds users are authenticated immediately, with no waiting, no drop-off, no frustration.
SMS reaches every mobile in India feature phones, 2G connections, every operator. Unlike app-based authenticators, SMS OTP works for 100% of your user base without any additional setup on their end.
Our SMS pricing is straightforward no monthly fees, no hidden charges, no confusing credit structures. Pay for what you send, with volume discounts as you scale.
India has over 900 million mobile users across every type of device and network. Our gateway has direct relationships with all major operators, so delivery rates remain high even in low-connectivity areas.
Adding OTP verification to every transaction or login makes unauthorized access exponentially harder. For e-commerce and banking clients, this alone often justifies the cost fraud losses consistently outweigh SMS costs.
TRAI's DLT registration is mandatory for all commercial SMS in India. We handle entity registration, sender ID creation, and template approvals at no extra cost, typically within 48 hours.
Reliable account security through OTP builds customer trust users who receive OTPs instantly feel secure on your platform. Slow or failed OTPs cause abandonment. Fast, consistent secure OTP delivery directly improves conversions and retention from day one.
Our REST API is clean and well-documented, with ready-made code samples in PHP, Python, Node.js, Java, and .NET. Most developers complete basic integration in well under an hour. View the full API docs ?
Whether you're sending 500 OTPs a day or need SMPP connectivity for enterprise volumes, the same platform handles it. No migration as you grow just upgrade your plan or contact our team for a custom arrangement. Need more channels? Explore WhatsApp Business API and RCS Messaging for richer customer communication.
From banking OTP SMS and fintech OTP API to e-commerce OTP SMS and healthcare verification our transactional SMS gateway is built for businesses where authentication failures aren't an option.
Payment authorization, fund transfer verification, account login alerts, and EMI reminders all delivered via dedicated transactional routes that bypass DND restrictions. Combine with our Bulk SMS Service for statements and alerts. Our banking SMS solutions are purpose-built for this.
User registration, checkout OTPs, order confirmations, and delivery updates. Works directly with Shopify, WooCommerce, and custom stacks. Reduces cart abandonment caused by slow or failed verification steps.
Appointment confirmation, lab report access, and secure patient portal login all via approved OTP templates. Relevant for clinics, hospital chains, and diagnostic labs handling sensitive health data. See our healthcare SMS solutions.
Enrollment verification, exam registration OTPs, and fee payment confirmation. Our education sector templates are pre-approved and ready to deploy saving weeks of DLT approval time.
KYC verification, wallet top-up confirmations, micro-investment approvals, and loan processing workflows. Sub-6-second delivery on dedicated SMPP routes is often a hard requirement for fintech compliance we meet it.
Driver verification OTPs, delivery confirmation codes, warehouse access authentication, and fleet management 2FA. E-commerce OTP SMS for last-mile delivery confirming POD, securing handoffs, and preventing fraud at every touchpoint across the supply chain.
Employee system access, internal approval workflows, and SaaS 2FA for thousands of concurrent users. Our SMPP connectivity option is purpose-built for enterprise-scale login verification volumes.
Hundreds of SMS providers exist in India. Most offer the same infrastructure with different logos. Here's what genuinely differentiates our service things our clients tell us matter most.
No setup fee, no monthly subscription, no surprises. Credits are valid for 12 months. View full pricing details ?
Buy credits, use them whenever you need no expiry pressure. Ideal for early-stage startups testing their product or businesses with unpredictable SMS volumes.
Pre-purchase SMS credits at discounted rates. The more you send, the lower your per-message cost. Most growing businesses find the bulk packs offer the best value by month 2.
For platforms sending 10 lakh+ OTPs per month. Includes SMPP connectivity, dedicated routes, SLA guarantees, priority support, and custom pricing. Talk to our team for a tailored quote.
Start with real API access and real delivery no credit card, no commitment. Get your account live today and experience the platform before you spend a single rupee.
Our OTP API India is a standard REST endpoint any team with HTTP experience will integrate it in under 30 minutes. When a user needs verification SMS, your backend calls the endpoint with their mobile number and a DLT-approved template, and the instant OTP SMS lands on their phone within seconds. Enterprise teams can connect via SMPP API for higher throughput.
High-volume platforms (10 lakh+ OTPs/month) benefit from direct SMPP API connectivity. Lower latency, persistent connections, and throughput suited to banking OTP SMS and fintech OTP API workloads that REST alone can't serve at scale.
POST https://api.metareachmarketing.com/v2/sms/send Headers: Authorization: Bearer YOUR_API_KEY Content-Type: application/json Body: { "sender": "MTRCHR", "message": "Your OTP is {#otp#}. Valid for 5 minutes. MetaReach", "mobile": "9876543210", "template_id": "1234567890123456789", "entity_id": "9876543210123456789" } Response: { "status": "success", "message_id": "MRM_20260402_001", "delivery": "queued" // delivered in 6s }
Download ready-made script samples in PHP, Python, and Node.js. SMPP available for very high volumes.
SDK & Language Support
Pre-built SDK wrappers and code samples integrate OTP API India into your stack in minutes.
Practical guides and comparisons for teams making decisions about their messaging infrastructure.
Not all SMS messages are the same. Here's why OTP routes are fundamentally different from regular bulk SMS and why it matters for your business.
Read article DLT GuideEverything you need to know about TRAI's DLT requirements who needs to register, what the process looks like, and how to avoid the common pitfalls.
Read article ComplianceSending SMS without DLT compliance is a regulatory risk and messages simply don't get delivered. Here's what changed and what you need to do.
Read article ComparisonFor OTPs and authentication, SMS consistently outperforms WhatsApp on reach and reliability. Here's the breakdown by use case.
Read article How-ToMost SMS delivery failures trace back to DLT setup errors. This guide covers the top mistakes businesses make and how our team can help you avoid them.
Read article Deep DiveThe PE-TM binding chain is why some messages go through and others don't. A plain-language explanation for business owners and developers.
Read articleStraight answers to the questions we hear most often from businesses evaluating our service.
An OTP SMS service delivers a One-Time Password to a user's mobile number whenever they need to verify their identity for login, payment, registration, or any sensitive action. The OTP arrives as a standard SMS, works on every mobile regardless of internet connectivity, and typically expires within a few minutes. As a DLT-approved transactional SMS gateway, MetaReach sends these OTPs via dedicated routes average delivery is 2 to 6 seconds, any time of day.
Transactional SMS Service which includes OTPs is sent for essential, non-marketing purposes: authentication, payment alerts, order confirmations, account notifications. It can be sent to DND numbers at any time, 24/7/365. Promotional SMS is for marketing offers and can only reach non-DND numbers between 9 AM and 9 PM. OTP and transactional messages always take the transactional route, which means they bypass DND restrictions entirely and have no time-of-day limits. Read our full guide on OTP vs normal SMS differences.
Yes sign up and you'll get API access and trial credits immediately, with no credit card required. This isn't a sandbox with fake delivery; you can send actual SMS to real numbers and test the full flow. For production volumes, pricing is flexible: pay-as-you-go for low or unpredictable volumes, and discounted bulk packs if you're sending consistently. Visit our pricing page for current rates, or call us for a custom quote on high-volume requirements.
It's a standard REST API your backend makes a POST request with the recipient's mobile number, your approved sender ID, and message template. Our gateway validates the request and dispatches the OTP within milliseconds; the user receives it in 6 seconds. We have ready-made code samples in PHP, Python, Node.js, Java, and .NET, plus a Postman collection. For most developers, basic integration takes under 30 minutes. Full API documentation is here.
2FA (two-factor authentication) adds a second verification step after the user enters their password. An OTP is sent to their registered mobile; they enter it to complete login. Our platform supports the full 2FA workflow via the same REST API. We also support voice OTP as a fallback if an SMS can't be delivered, the system can call the user and read the code aloud, ensuring virtually zero verification failures.
Yes we manage the entire DLT registration process on your behalf at no extra charge. This covers entity registration on the TRAI portal, sender ID assignment, and OTP template approvals. The process typically takes 248 hours once we have your documents. For businesses that haven't gone through this before, we've written a complete DLT guide for 2026 that explains every step.
Free trial, no credit card. Our team gets your account live DLT registration included within 24 hours. Whether you're sending 500 OTPs a day or building for millions, we've got the infrastructure ready.
From startups to enterprises — brands that grow with MetaReach
