⚡ Enterprise SMS API & Bulk SMS Platform

SMS API for OTP, Transactional & Bulk Messaging

Conecsy offers a reliable SMS API and bulk SMS service for sending OTPs, transactional alerts, and high-volume messages with ultra-low latency. Built for enterprises, our platform ensures fast delivery, DLT compliance, and real-time reporting across all telecom operators.

  • ✔ OTP SMS delivery under 1 second
  • ✔ Fully DLT & TRAI compliant routes
  • ✔ High availability with 99.99% uptime
Get SMS API Access View SMS API Documentation
Messages
Your OTP request is being processed…
Your OTP is 482913
Valid for 5 minutes
✔ Delivered in 0.8s

Types of SMS Services

Conecsy supports both Promotional and Transactional SMS services. Understanding the difference helps ensure regulatory compliance and maximum message deliverability.

Promotional SMS

Promotional SMS is used for marketing campaigns, discount offers, product launches, and customer engagement messages sent to opted-in users.

  • ✔ Bulk promotional SMS campaigns
  • ✔ Delivered during TRAI-approved time windows
  • ✔ Sent only to non-DND numbers
  • ✔ Explicit customer consent required
SMS
Flat 30% OFF on your next order!
Use code SALE30
Shop now: example.com
Promotional Message

Transactional SMS

Transactional SMS is used for time-sensitive communication such as OTPs, login alerts, order confirmations, and critical system notifications.

  • ✔ OTP and security alert messaging
  • ✔ 24×7 delivery including DND numbers
  • ✔ Priority and failover routing
  • ✔ DLT-approved templates mandatory
SMS
Your OTP is 4829XX
Valid for 5 minutes.
Do not share with anyone.
Transactional Message

Promotional vs Transactional SMS — Key Differences

Promotional SMS

  • Purpose Marketing & Offers
  • Delivery Time Restricted Hours
  • DND Numbers Not Allowed
  • OTP / Alerts No
  • Consent Required Yes
Best for OTP

Transactional SMS

  • Purpose Critical Information
  • Delivery Time 24×7 Delivery
  • DND Numbers Allowed
  • OTP / Alerts Yes
  • Priority Routing Enabled

DLT Compliance (India)

As per TRAI regulations, all SMS traffic in India must comply with Distributed Ledger Technology (DLT) guidelines. Conecsy assists businesses with complete DLT onboarding, approval, and compliance management.

  • ✔ Business entity registration on DLT
  • ✔ Sender ID approval and management
  • ✔ Template whitelisting and validation
  • ✔ Consent management for promotional SMS

DLT Registration & Onboarding Process

1️⃣ Register Entity
2️⃣ Add Sender ID
3️⃣ Submit Templates
4️⃣ Go Live

Live OTP SMS API Simulation

See how Conecsy generates and delivers OTP SMS in real time using secure APIs, intelligent routing, and priority delivery channels.

API Request
      POST /sms/send
      {
        "to": "+91XXXXXXXXXX",
        "message": "Your OTP is ******"
      }

API Hit Processing Delivered
Messages
Waiting for OTP…

Transparent SMS Pricing

Promotional SMS

₹0.14/credit
  • ✔ Marketing campaigns
  • ✔ Non-DND delivery
  • ✔ URL tracking
Start Campaign

Transactional SMS

₹0.16/credit
  • ✔ Notification
  • ✔ DND delivery
  • ✔ Priority routing
Start Campaign

SMS API (OTP)

₹0.17/credit
  • ✔ OTP/ Alerts
  • ✔ Authentication
  • ✔ within 10 sec delivery
Start Campaign

SMS API Integration for Developers 


    









    


      

        
SMS Delivery Reports & Analytics

        

          Monitor SMS delivery status, success rates, failures, and latency using real-time analytics dashboards and API-based reports.
        

      


      
      

        

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Live Message Status

        
    
      
    

    
    

    





    
    
    

      
    
        
    SMS Message Delivery Flow
    
        
    
          Visualize how your SMS travels from API request to telecom operator and finally reaches the customer handset.
        
    

      
    

      
    

        
        
    
          
    
            
          
    
          
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        Note: Delays can occur at operator level due to DLT validation, DND checks, or network congestion.
      
    

    
    

    






    
      
    

        
    
          
    SMS API Frequently Asked Questions
    
          
    
            Common questions about SMS APIs, OTP delivery, DLT compliance, and bulk SMS services.
          
    

        
    

        
    

          
    
            
            
    
              Promotional SMS is used for marketing offers and campaigns and is delivered
              only to non-DND numbers during permitted hours. Transactional SMS is used for
              OTPs and alerts and is delivered 24×7, including DND numbers.
            
    
          
    

          
    
            
            
    
              Yes. As per TRAI regulations, all businesses must register on DLT platforms,
              approve sender IDs, and submit message templates before sending SMS.
              We handle complete DLT onboarding for you.
            
    
          
    

          
    
            
            
    
              OTP messages are typically delivered in under 1 second using priority routes
              and intelligent operator routing. Delivery speed may vary slightly based on
              operator and network conditions.
            
    
          
    

          
    
            
            
    
              Transactional SMS such as OTPs and alerts can be sent to DND numbers.
              Promotional SMS cannot be delivered to DND numbers under TRAI guidelines.
            
    
          
    

          
    
            
            
    
              Yes. You get real-time delivery reports, operator-level status,
              latency tracking, and failure reasons through our dashboard and APIs.
            
    
          
    

          
    
            
            
    
              Absolutely. Our REST APIs allow you to send SMS, check delivery status,
              manage templates, and integrate OTP flows easily with your applications.
            
    
          
    

          
    
            
            
    
              Yes. Our enterprise infrastructure supports high TPS, dedicated routes,
              failover mechanisms, and SLA-backed delivery for large-scale messaging.
            
    
          
    

        
    
      
    

    





    
  
    Start Sending SMS with Conecsy
    
  
    
    Integrate our SMS API to send OTPs, transactional alerts, and bulk messages with enterprise-grade reliability.
  
    
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