Secure OTP API for Indian businesses

Reliable OTP API
for your Business.

Send verification OTPs, use approved templates, manage DLT workflows and track delivery from one focused platform.
Built for security, compliance and scale.

Get started for free </> View API docs
Secure API
access
Approved
template flow
Delivery
tracking
Transparent
pricing
Built for developers & businesses across India
Secure Compliant Reliable
Send OTP Request Live
IN ▾+91 98765 ••••
Verification OTP▾
Encrypted request handling
WHY TEAMS CHOOSE NIZORASMS

Built for fast, secure
OTP delivery.

Everything you need to send, manage and track OTPs — with compliance and clarity.

Fast integration

Simple API and quick setup.

DLT-ready flow

Templates, headers and compliance support.

Live delivery tracking

Track request lifecycle in real time.

Transparent pricing

Clear billing for every OTP.

How it works

Start in four simple steps.

From account creation to your first OTP request, the flow stays clear and predictable.

01

Create account

Sign up and verify your mobile number to activate your account.

Quick onboarding
02

Get API access

Create an account-specific API key from your developer panel.

Controlled access
03

Select template

Use an available template or submit your own template workflow.

DLT-ready flow
04

Integrate & send

Call the OTP API and track the request through delivery states.

Trackable request
Ready to integrate?

Create your account, generate an API key and start with an approved template path.

Create free account View API documentation
Built for developers

Simple API.
Clear responses.

Integrate server-to-server with a secure JSON API, idempotency protection and request status tracking.

  • REST API with JSON requests
  • Revocable API key authentication
  • Idempotency-Key duplicate protection
  • Request status tracking
Create account Open developer panel 
curl -X POST "https://nizorasms.com/api/v1/otp/send" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: login_2026_0001" \
  -d '{
    "mobile": "98765XXXXX",
    "otp": "123456",
    "template_id": "YOUR_TEMPLATE_PUBLIC_ID",
    "reference_id": "login_12345"
  }'
Secure server-side integrationPOST /api/v1/otp/send
Templates & DLT Workflows

Start simple.
Use approved templates.

Explore available approved OTP templates for initial testing, or request dedicated DLT onboarding for a customer-specific registered sender ID.

Pre-Approved Templates Instant access to standard login, signup & verification templates with zero wait time.
DLT Entity & Header KYC Dedicated assistance for Principal Entity registration, Headers & Content template approval.
Instant API Synchronization Approved templates automatically map to your API key ready for high-speed dispatch.
Create free account Ask about DLT setup
Template Library Pre-approved transactional routes
TRAI Ready
All (4) OTP Security Custom
Verification OTP Instant Active
Your verification code is {#var#}. Valid for 10 mins. - Nizora
Header: NZR-OTP Transactional
Login Authentication Instant Active
{#var#} is your secret login OTP. Do not share with anyone.
Header: NZR-SEC Transactional
Password Reset Instant Active
Use code {#var#} to reset your account password. NizoraSMS.
Header: NZR-ACC Transactional
Custom Branded Template 1-Click Apply

Upload company sender ID & custom template text for 24h approval.

Custom Header KYC Enterprise
Custom Template Flow Fast-track approval lifecycle
~24h SLA
  1. 1
    Submit Request

    Provide template text, {#var#} placeholders & 6-char Header ID.

  2. 2
    Admin Sanity Check

    Internal format & TRAI anti-spam compliance verification.

  3. 3
    Operator Approval

    Telco registry mapping across Jio, Airtel, Vi & BSNL gateways.

  4. Template Active

    Mapped to your API key for use with the approved messaging route.

Transparent Pricing

Two flexible models to power your business.

Compare active pricing slabs and available prepaid packages. Message rates, routes and inclusions depend on the selected plan.

MODEL 1 • PAY AS YOU GO

Flexible Wallet Recharge Plans

Wallet slabs start from ₹100 based on the currently listed plans. The applicable OTP rate depends on the selected slab and route; check your plan terms for validity and usage.

Plan Recharge range Included features OTP rate Action
Starter
₹100–₹5,000
Direct route DLT ready
₹0.28/ OTP Get started
Growth
₹5,000–₹10,000
Direct route DLT ready
₹0.26/ OTP Get started
Pro Most popular
₹10,000–₹15,000
Direct route DLT ready
₹0.23/ OTP Get started
Business
₹15,000–₹20,000
Direct route DLT ready
₹0.20/ OTP Get started
Scale
₹20,000–₹30,000
Direct route DLT ready
₹0.18/ OTP Get started
Enterprise Wallet
₹30,000+
Direct route DLT ready
₹0.16/ OTP Get started
API credential protection
Available route monitoring
Check active plan terms and inclusions
MODEL 2 • ENTERPRISE BULK SMS & OTP

Bulk SMS & OTP Packages

Pre-purchased high-volume OTP credit bundles for apps and businesses. Lowest per-OTP rates with complimentary DLT registration, dedicated sender header IDs, and priority multi-operator routing.

High Volume Pack

Launch

1 Lakh OTP
₹23,000 Effective ₹0.23 / OTP
  • 1 Lakh OTP prepaid credits
  • Free DLT Onboarding included
  • 1 Included Header ID (Sender)
  • 1 Included DLT Template
  • Delivery status tracking
  • Route availability monitoring
Activate Launch
Most Popular Pack
High Volume Pack

Growth

5 Lakh OTP
₹70,000 Effective ₹0.14 / OTP
  • 5 Lakh OTP prepaid credits
  • Free DLT Onboarding included
  • 1 Included Header ID (Sender)
  • 1 Included DLT Template
  • Delivery status tracking
  • Route availability monitoring
Activate Growth
High Volume Pack

Business

10 Lakh OTP
₹120,000 Effective ₹0.12 / OTP
  • 10 Lakh OTP prepaid credits
  • Free DLT Onboarding included
  • 1 Included Header ID (Sender)
  • 1 Included DLT Template
  • Delivery status tracking
  • Route availability monitoring
Activate Business
High Volume Pack

Scale

20 Lakh OTP
₹220,000 Effective ₹0.11 / OTP
  • 20 Lakh OTP prepaid credits
  • Free DLT Onboarding included
  • 1 Included Header ID (Sender)
  • 1 Included DLT Template
  • Delivery status tracking
  • Route availability monitoring
Activate Scale
Dedicated Account Assistance Priority support for onboarding, routing & queries
Complete DLT Registration Help Assistance for Entity KYC, Headers & Content Templates
Pan-India Multi-Operator Failover Routing is subject to provider and network availability
Enterprise Security & Reliability

Your credentials.
Your traffic.
Protected by design.

Secure API access, delivery monitoring and configurable messaging workflows help teams operate their OTP verification processes.

API Status Monitoring
DLR Delivery Reports
TRAI DLT Compliant
SHA-256 VAULT
Isolated API Credentials

Cryptographically hashed API secrets never stored in plaintext with instant 1-click rotation and strict IP allowlists.

BOT FIREWALL
Intelligent Traffic Firewall

Adaptive sliding-window rate limiters and volumetric fraud detection defend your wallet from automated SMS pumping attacks.

CARRIER FAILOVER
Multi-Telco Auto-Failover

Monitor route availability and delivery status. Alternate routing depends on active providers, approvals and destination networks; delivery is not guaranteed.

TRAI COMPLIANT
Cryptographic Audit Trail

Immutable event logging, operator-verified delivery receipts (DLR), and end-to-end regulatory compliance records.

Frequently asked questions

Answers before
you integrate.

Simple answers to common questions about OTP API access, templates, DLT and request tracking.

Still need help? Contact us
Which is the best OTP SMS service provider in India?+

NizoraSMS provides an OTP SMS API for Indian apps and websites. Compare integration steps, DLT requirements, pricing and delivery reporting before choosing a provider.

How fast does NizoraSMS deliver OTPs across Indian networks?+

OTP delivery times depend on destination network and conditions. Test delivery with your real traffic and monitor status responses.

Is DLT registration mandatory for sending OTPs in India?+

Yes, as per TRAI regulations in India, commercial SMS requires DLT registration. Businesses should confirm applicable entity, sender header and content template approvals before live commercial messaging.

How can I integrate NizoraSMS OTP API with my app or website?+

Use the developer documentation to review authentication, request format and status handling, then test in your backend before production.

What is the pricing for OTP and bulk transactional SMS in India?+

NizoraSMS provides pay-as-you-go wallet plans and prepaid packages. Check the current pricing table for the minimum recharge, applicable message rates and plan terms.

How does NizoraSMS protect against SMS pumping and OTP bot fraud?+

Limit OTP issuance per recipient and IP, implement cooldowns and protect API keys. Review available account security settings with the provider.

Ready to get started?

Add OTP verification to your application.

Create an account, generate an API key and start with the template path available to you.

Create account View API example
SMS SOLUTIONS FOR INDIA

Find the right SMS solution for your business.

Whether you need secure phone verification, important customer notifications or opt-in campaigns, explore the right SMS integration for your use case.

01 / VERIFY

OTP SMS API

Integrate one-time passwords for sign-in, account verification and secure customer workflows.

Explore OTP API
02 / NOTIFY

Transactional SMS

Send service alerts, order updates and other important messages using approved templates.

Explore transactional SMS
03 / REACH

Bulk SMS Gateway

Plan permission-based business messaging with attention to recipient consent and DLT requirements.

Explore bulk SMS

Getting started? Review the DLT onboarding guide and developer documentation before sending production traffic.

Contact our team