MetaReach's OTP API delivers DLT-compliant one-time passwords across India in under 6 seconds. REST for standard integrations, SMPP for enterprise throughput, free sandbox key, and SDKs for PHP, Python, Node.js, Java, and .NET.
Meta Reach Marketing built its OTP API for developers who need reliable, low-latency SMS OTP delivery without managing carrier relationships, DLT filing, or delivery infrastructure themselves. You send one HTTP request with the user's mobile number and an approved template - we handle routing, retries, and delivery reporting.
The same OTP API India platform powers login verification, payment confirmations, and account recovery flows for banks, fintech apps, e-commerce platforms, and SaaS products across the country. It sits on the same infrastructure as our OTP SMS Services, so pricing, delivery routes, and DLT compliance are identical - the API is simply the programmatic way to trigger it.
Get started with a free sandbox key in minutes. Contact us today or call +91-7669999219 for a guided integration walkthrough.
Priority OTP routes across Jio, Airtel, Vi, and BSNL keep average API-to-handset delivery under 6 seconds, even during peak traffic.
A single HTTP POST request with plain JSON body and response - no XML, no proprietary formats. Works with any language that can make an HTTP call.
Persistent SMPP v3.4 binds for platforms sending 10 lakh+ OTPs a month - 1,000+ TPS per bind with dedicated IP and port assignment.
Every API call requires an approved DLT template and entity ID, passed directly in the request - MetaReach handles registration free of charge. See our OTP DLT compliance guide for template and PE-TM binding rules.
Subscribe a webhook URL to receive sent, delivered, or failed status for every OTP the moment it happens - no polling required.
Configure automatic fallback to a Voice OTP call when SMS delivery fails or goes unacknowledged, so a verification attempt is never lost. See our SMS to Voice OTP fallback guide for timing and setup.
/v2/sms/send endpoint with cURL or
one of our PHP, Python, Node.js, Java, or .NET code samples - see the delivery
report in your dashboard within seconds.
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_20260910_001", "delivery": "queued" // delivered in ~5s }
Download ready-made script samples in PHP, Python, and Node.js, or read the full OTP SMS API reference.
SDK & Language Support
Ready-made code samples so your developers integrate the OTP API in minutes, not days.
Both connect to the same MetaReach OTP infrastructure. The right choice depends on your volume and how much control your team needs over the connection.
| Factor | REST API | SMPP |
|---|---|---|
| Best for | Most apps, websites, and SaaS platforms | Banks and platforms sending 10 lakh+ OTPs/month |
| Integration time | Under 30 minutes with SDK/code samples | 1-2 business days (IP whitelisting, load testing) |
| Connection type | Stateless HTTPS request per OTP | Persistent binary socket (SMPP v3.4) |
| Throughput | High concurrent request volume, standard for most businesses | 1,000+ transactions per second per bind |
| Delivery reports | Webhook callback or polling | Native PDU delivery receipts |
Not sure which fits your volume? Read our SMPP connectivity guide or call our integration team - most businesses start on REST and move to SMPP only once volume justifies it.
Sign up in minutes, test the full REST API in sandbox with free credits, and go live the same day once your DLT template is approved.
Login verification, fund transfer confirmation, and loan disbursement approval - the API passes DLT template and entity IDs on every call so audit trails stay compliant.
Checkout verification and account sign-up OTPs at scale, with webhook callbacks feeding directly into order and CRM systems for real-time status tracking.
Two-factor sign-in and device verification handled through a single REST call - PHP, Python, Node.js, and Java SDKs mean any stack integrates without a dedicated SMS engineer.
Patient identity confirmation before sharing reports, and policy verification for insurance claims - with automatic Voice OTP fallback for low-connectivity areas.
The OTP API itself is free to access - you pay only ₹0.12 per SMS delivered. A few factors can affect your final cost:
| Pricing Factor | How It Affects Cost |
|---|---|
| Monthly OTP volume | Higher volume unlocks prepaid pack discounts on the standard ₹0.12/SMS rate. |
| REST vs SMPP connection | REST is included at no extra cost; dedicated SMPP binds may carry a setup fee for enterprise SLA guarantees. |
| Voice OTP fallback usage | Fallback voice calls are billed separately, per call, only when SMS delivery fails and fallback is triggered. |
| Dedicated vs shared route | A dedicated sender ID and route costs more than shared infrastructure but improves consistency during peak load. |
| Support & SLA tier | Enterprise accounts with a guaranteed uptime SLA and dedicated account manager carry a contract premium. |
Compare the full picture on our bulk SMS pricing page or the dedicated OTP SMS pricing breakdown.
From startups to enterprises — brands that grow with MetaReach
