Quick Answer
An SMS gateway is the system that carries messages from your software to mobile networks. In India, every commercial SMS passes through the gateway, then operator DLT scrubbing, before reaching the handset, so the message must match a registered template and header. SMSGatewayHub is an SMS gateway in India offering HTTP, HTTPS, SMPP and XML APIs, a web panel and plugins, with OTP, transactional, service and promotional routes, live delivery reports and billing only for delivered SMS.
How an SMS gateway in India works
Every message takes the same path, and each stage can be checked in your delivery report.
| Stage | What happens | Why it matters |
|---|
| Your application | Calls the SMS gateway API with number, text, header and template ID | Integration once, then fully automated |
| SMS gateway | Authenticates, queues and routes the message to the best operator connection | Speed and failover at peak load |
| DLT scrubbing | Operator checks your entity, header, template and consent rules | Mismatched text is rejected |
| Mobile operator | Delivers to the handset, applying DND preferences for promotional SMS | Route type decides who you can reach |
| Delivery report | Status flows back to your panel and API | Retry, fall back or bill only for delivered |
SMS gateway API options
Pick the interface that fits your stack and volume. All of them use the same account, credits and DLT set-up.
HTTP and HTTPS API
Send with a single GET or POST request from any language. See the HTTPS API and HTTP API.
SMPP connectivity
Persistent binds for high-volume senders and resellers. See the SMPP API.
XML API
Batch many messages in one request with the XML API.
Web panel
Upload contacts and schedule campaigns without code, with live delivery reports.
Endpoints, parameters and code samples are in the SMS gateway API documentation.
Which SMS route does your message need?
Operators add a suffix to every header so customers can see the message type. Choosing the right category is part of DLT registration.
| Category | Suffix | Typical messages | DND & timing |
|---|
| Transactional | -T | OTPs for login, sign-up and payments | All numbers incl. DND, 24/7 |
| Service | -S | Order, delivery, EMI and appointment updates with no offers | All numbers incl. DND |
| Promotional | -P | Offers, sales, launches and invitations | Non-DND or consented numbers, 10 AM to 9 PM |
Learn more on transactional SMS, promotional SMS and OTP SMS service provider pages.
Why SMSGatewayHub
Why businesses choose SMSGatewayHub as their SMS gateway in India
Reliability, honest billing and help with DLT are what separate SMS gateways in India.
Multi-operator routing
Automatic failover across operator connections, 2-6 second typical OTP delivery and a 99.9% uptime SLA.
Pay only for delivered SMS
Billing follows real delivery. How it works
DLT support
Help with entity, header and template registration and the typed-variable format. DLT priority support
Certified security
ISO 27001, ISO 9001:2015, SOC 2 and VAPT tested. Trust Center
SMS gateway use cases by industry
How to start with our SMS gateway
Create an account
Sign up free and get 1,000 SMS credits to test.
Register on DLT
Register your entity, a 6-character sender ID and templates. See DLT registration.
Map templates
Add your entity ID and template IDs in the panel so every message matches DLT.
Integrate the API
Connect over HTTPS or SMPP, or start from the panel.
Send and monitor
Track delivery reports and estimate spend with the SMS cost calculator.
TRAI and DLT compliance checklist
- Every commercial SMS needs a registered entity, header and template on a DLT platform.
- Use typed variables such as {#numeric#} and {#url#} in templates, as now required.
- Whitelist every link and callback number as a CTA; unregistered links are blocked.
- Send promotional SMS only to non-DND or consented numbers, between 10 AM and 9 PM.
- Keep OTP and service templates free of offers so they stay in the right category.
- Check rejections with the DLT error codes guide and the TRAI regulations summary.
Frequently Asked Questions
What is an SMS gateway?
An SMS gateway is the system that takes messages from your software, through an API or panel, and passes them to mobile networks for delivery. It also returns delivery reports so you know which messages reached the handset.
What is an SMS gateway API?
An SMS gateway API is the interface your application calls to send SMS automatically. SMSGatewayHub offers HTTP, HTTPS, SMPP and XML APIs, so you can send from any programming language or system.
Do I need DLT registration to use an SMS gateway in India?
Yes. TRAI rules require every business sending commercial SMS in India to register its entity, sender ID headers and message templates on a DLT platform. SMSGatewayHub's team helps you complete it.
Can an SMS gateway send messages to DND numbers?
Transactional and service messages, such as OTPs and order updates, reach DND numbers. Promotional SMS can only go to non-DND or consented numbers between 10 AM and 9 PM.
HTTP API or SMPP: which should I choose?
Choose the HTTP or HTTPS API for most apps and websites, because it is quick to integrate. Choose SMPP when you send very high volumes or need persistent connections, for example as a reseller or aggregator.
How much does an SMS gateway cost in India?
SMSGatewayHub uses Pay As You Go pricing: you buy credits and pay only for delivered SMS. Rates depend on route and volume; see the pricing page or call 1800 102 1822.
Connect to our SMS gateway today
Get 1,000 free SMS credits, free DLT guidance and an API key, and send your first message within a day.