One API for All Channels

Unified Messaging API
One API for All Communication Channels

Send Email, SMS, WhatsApp, and Push notifications through one unified API. Switch channels without code changes.
One API key. One SDK. One dashboard. One bill. Eliminate vendor lock-in today.

Complete Unified Messaging Solution

Email API

Send transactional and marketing emails with 99.9% deliverability through our unified API

SMS API

Global SMS delivery to 200+ countries with the same API structure as all other channels

WhatsApp API

Send WhatsApp messages with templates, media, and interactive buttons using unified API

Push Notifications

Mobile and web push notifications for iOS, Android, and browsers via single endpoint

Powerful Unified API Features

One API Endpoint

Use a single API endpoint to send messages across all channels. Switch from email to SMS by changing just one parameter. No need to learn multiple APIs or integrate different providers.

Single API Key

One API key works for all channels - Email, SMS, WhatsApp, and Push. Simplify key management and reduce security complexity. Easy credential rotation across all channels.

Channel Fallback

Automatically fallback to alternative channels if primary delivery fails. If email bounces, retry via SMS. If SMS fails, try WhatsApp. Ensure critical messages always reach users.

Unified Analytics

Track all channel performance in one dashboard. Compare email, SMS, WhatsApp, and Push metrics side-by-side. Identify best-performing channels and optimize campaigns accordingly.

Unified Contact Management

Manage all user contact information in one place. Store email, phone, WhatsApp, and device tokens centrally. Sync user preferences across all communication channels automatically.

Single Billing

One invoice for all channels. Transparent pricing with no hidden fees. Track costs per channel in unified dashboard. Volume discounts apply across all channels combined.

Unified SDK

One SDK for all programming languages and all channels. Consistent API design across Node.js, Python, PHP, Ruby, Java, Go, and C#. Switch channels without learning new syntax.

No Vendor Lock-in

Maintain full portability and flexibility. Export all data anytime. Use your own SMTP, SMS, or WhatsApp providers alongside ours. Switch providers without changing code.

Multi-Channel Scheduling

Schedule messages across all channels from single interface. Coordinate email, SMS, and push campaigns. Send based on recipient timezone preferences automatically.

Cross-Channel Templates

Create templates that work across all channels. Define content once, deliver everywhere. Automatic template adaptation for email, SMS, WhatsApp, and push formats.

Send Messages Across All Channels with Same API

Switch channels by changing just the "channel" parameter. Same structure, same authentication, same simplicity.

POST https://api.sendmator.com/api/v1/messages/send
Content-Type: application/json
X-API-Key: your-api-key

// Send Email
{
  "channel": "email",
  "to": "user@example.com",
  "subject": "Order Confirmation",
  "message": "Your order #12345 has been confirmed."
}

// Send SMS - just change channel!
{
  "channel": "sms",
  "to": "+1234567890",
  "message": "Your order #12345 has been confirmed."
}

// Send WhatsApp - same API structure
{
  "channel": "whatsapp",
  "to": "+1234567890",
  "message": "Your order #12345 has been confirmed."
}

// Send Push Notification - identical pattern
{
  "channel": "push",
  "to": "device-token-here",
  "title": "Order Update",
  "message": "Your order #12345 has been confirmed."
}
        

Channel Fallback - Ensure Message Delivery

Automatically retry failed messages through alternative channels. Maximize delivery rates with intelligent fallback.

POST https://api.sendmator.com/api/v1/messages/send
Content-Type: application/json
X-API-Key: your-api-key

// Send with automatic fallback
{
  "channel": "email",
  "to": "user@example.com",
  "subject": "Your OTP Code",
  "message": "Your verification code is 123456",
  "fallback": [
    {
      "channel": "sms",
      "to": "+1234567890"
    },
    {
      "channel": "whatsapp",
      "to": "+1234567890"
    }
  ]
}

// Response shows delivery path
{
  "success": true,
  "messageId": "msg_abc123xyz",
  "primaryChannel": "email",
  "primaryStatus": "bounced",
  "deliveredChannel": "sms",
  "deliveredStatus": "delivered"
}
        

Multi-Channel Campaign with Unified SDK

Send coordinated campaigns across multiple channels with consistent code structure.

// Node.js - Send to all channels at once
const Sendmator = require('@sendmator/sdk');
const client = new Sendmator('your-api-key');

// Send email to all users
await client.send({
  channel: 'email',
  to: users.map(u => u.email),
  subject: 'Flash Sale - 50% Off!',
  template: 'flash-sale'
});

// Send SMS to opted-in users
await client.send({
  channel: 'sms',
  to: users.filter(u => u.smsOptIn).map(u => u.phone),
  message: 'Flash Sale! 50% off everything. Shop now!'
});

// Send push to mobile app users
await client.send({
  channel: 'push',
  to: users.filter(u => u.deviceToken).map(u => u.deviceToken),
  title: 'Flash Sale Alert!',
  message: '50% off everything for 24 hours only'
});

// Python - Same pattern
from sendmator import Sendmator

client = Sendmator('your-api-key')

# Send to multiple channels
client.send({
    'channel': 'email',
    'to': 'user@example.com',
    'subject': 'Welcome!',
    'template': 'welcome'
})

client.send({
    'channel': 'sms',
    'to': '+1234567890',
    'message': 'Welcome to our service!'
})
        

Unified API vs Multiple Providers

See how unified messaging API simplifies your infrastructure

Feature Sendmator Unified API Multiple Providers
API Endpoints 1 endpoint 4+ different endpoints
API Keys 1 key for all 4+ separate keys
SDKs to Install 1 SDK Multiple SDKs
Analytics Dashboard Unified view Fragmented across tools
Channel Switching Change 1 parameter Rewrite integration
Billing One invoice Multiple vendors
Channel Fallback
Unified Contact Management
Cross-Channel Analytics
Vendor Lock-in None High
Support One team Multiple vendors
Integration Time 1 hour Multiple weeks
Switch to Unified API

Unified Messaging API Use Cases

Multi-Channel Campaigns

Launch coordinated marketing campaigns across email, SMS, WhatsApp, and push. Reach users on their preferred channels with consistent messaging.

Critical Alert Delivery

Send critical alerts with automatic fallback. Start with push, fallback to SMS if undelivered, then email. Ensure important messages always reach users.

Transactional Messages

Send order confirmations via email, shipping updates via SMS, delivery notifications via WhatsApp - all from one API. Optimize channel for each message type.

Unified Analytics

Compare performance across all channels in one dashboard. Identify which channels drive best engagement. Optimize budget allocation based on unified data.

User Verification

Send OTP codes with intelligent channel selection. Try email first for cost efficiency, fallback to SMS for reliability. Maximize conversion while minimizing costs.

Customer Engagement

Build customer journeys that span multiple channels. Welcome via email, re-engage via push, convert via SMS. Track user behavior across all touchpoints.

Why Choose Sendmator Unified Messaging API?

Single API Integration

Integrate once, access all channels. One API endpoint, one authentication method, one documentation set. Reduce integration time from weeks to hours.

Channel Flexibility

Switch channels without code changes. Change one parameter to go from email to SMS to WhatsApp. Test channel performance without engineering effort.

Unified Analytics

All channel metrics in one place. Compare email opens, SMS delivery, WhatsApp clicks, and push CTR side-by-side. Make data-driven decisions faster.

Cost Efficiency

Volume discounts apply across all channels combined. One invoice, predictable pricing, no hidden fees. Save 40% vs managing multiple providers.

99.9% Reliability

Enterprise-grade infrastructure for all channels. Automatic failover and redundancy. SLA-backed uptime guarantees. Your messages always get delivered.

No Vendor Lock-in

Export all data anytime. Use your own providers alongside ours. Switch vendors without changing code. Maintain full control of your messaging.

Advanced Unified API Features

Unified Contact Management

Store email, phone, WhatsApp, and device tokens in one contact record. Manage preferences across all channels centrally. Sync data automatically.

Intelligent Channel Routing

Automatically select optimal channel based on user preferences, past engagement, and message urgency. Maximize delivery and engagement rates.

Cross-Channel Templates

Define templates once, render across all channels. Automatic adaptation for email HTML, SMS text, WhatsApp format, and push notifications.

Coordinated Scheduling

Schedule multi-channel campaigns from one interface. Send email at 9am, SMS reminder at 2pm, push at 5pm - all coordinated automatically.

Unified Webhooks

Single webhook endpoint for all channel events. Track delivered, opened, clicked, bounced, and replied across email, SMS, WhatsApp, and push.

A/B Testing Across Channels

Test message performance across channels. Compare email vs SMS, WhatsApp vs push. Identify best channel for each campaign type automatically.

Frequently Asked Questions

What is a unified messaging API?

A unified messaging API provides a single interface to send messages across multiple channels (email, SMS, WhatsApp, push) without managing separate integrations. One API endpoint, one SDK, one consistent structure for all channels.

How does channel switching work?

Simply change the "channel" parameter in your API call from "email" to "sms" or "whatsapp". No code changes required. Same authentication, same structure, same SDK - just different channel value.

What is channel fallback?

Channel fallback automatically retries message delivery through alternative channels if the primary channel fails. For example, if email bounces, automatically retry via SMS, then WhatsApp. Maximizes delivery rates.

Can I use my own SMTP or SMS providers?

Yes, our unified API supports bring-your-own-provider. Connect your own SMTP server, Twilio account, or WhatsApp Business API while using our unified interface. No vendor lock-in.

How does unified analytics work?

All channel metrics appear in one dashboard. Compare email open rates, SMS delivery, WhatsApp clicks, and push CTR side-by-side. Track campaigns across channels with unified reporting.

What about pricing for multiple channels?

Pay only for what you use per channel. Email starting at $0.0002, SMS at $0.015, WhatsApp at $0.02, Push at $0.0001 per message. Volume discounts apply across all channels combined. One invoice for everything.

Do I need separate API keys for each channel?

No, one API key works for all channels. Single authentication method for email, SMS, WhatsApp, and push. Simplifies key management and security. Easier credential rotation.

How fast can I integrate the unified API?

Most developers integrate in under 1 hour. One SDK installation, one API endpoint to learn, comprehensive documentation. Much faster than integrating 4+ separate messaging providers.

Can I manage user preferences across all channels?

Yes, unified contact management lets you store preferences for all channels in one place. Users can opt-in/out of email, SMS, WhatsApp, or push independently. Preferences sync automatically.

What programming languages are supported?

Official SDKs for Node.js, Python, PHP, Ruby, Java, Go, and C#. REST API works with any language. Same consistent API structure across all SDKs and channels.

Is there a free trial?

Yes, free trial includes credits for all channels - email, SMS, WhatsApp, and push. Test the entire unified API with no credit card required. Start sending in 5 minutes.

How reliable is the unified API?

99.9% uptime SLA for all channels. Enterprise infrastructure with automatic failover. Redundant carrier connections for SMS and WhatsApp. Your messages always get delivered.

Ready to Unify Your Messaging?

Send Email, SMS, WhatsApp, and Push through one API. Switch channels without code changes. Unified analytics. No vendor lock-in. 99.9% uptime.

Start Free Trial

No credit card required • One API key • All channels • 24/7 support