Send Cascade Messages

Send messages across multiple channels with a single API request. Cascade automatically routes your message through Telegram Bot, Viber Bot, Viber Business Messages, RCS, and SMS.

Endpoints

Standard Cascade

POST /api/CascadeMessage/send_message/async

Routes messages through all available channels in sequence.

Telegram-Viber Priority

POST /api/CascadeMessage/send_message/tg-viber/async

Prioritizes Telegram and Viber channels for faster delivery.

Authentication

Cascade API supports three authentication headers. Include at least one:

Header	Description
X-Authorization-Key	SMSBAT API key (recommended)
X-Viber-Auth-Token	Viber bot credentials
X-Tg-Bot-Key	Telegram bot key

Request Structure

Headers

Content-Type: application/json
X-Authorization-Key: your-smsbat-api-key
X-Viber-Auth-Token: your-viber-token
X-Tg-Bot-Key: your-telegram-key

Request Body

Send an array of message objects:

[
  {
    "id": "unique-tracking-id",
    "fromName": "YourBrand",
    "toPhone": "+380XXXXXXXXX",
    "messageType": "transaction",
    "text": "Your order #12345 has been confirmed",
    "ttl": 3600,
    "scheduledSent": "2025-01-25T10:00:00Z"
  }
]

Parameters

Parameter	Type	Required	Description
id	string	Yes	Your tracking identifier
fromName	string	Yes	Sender display name
toPhone	string	Yes	Recipient phone number (E.164 format)
messageType	string	Yes	Message type: transaction, promo, viber_survey, flashcall
text	string	Yes*	Message content (* required for most types)
ttl	integer	No	Time-to-live in seconds
scheduledSent	string	No	ISO 8601 datetime for scheduled delivery

Message Types

Transaction Messages

Critical notifications like order confirmations and account updates:

{
  "id": "order-12345",
  "fromName": "YourStore",
  "toPhone": "+380XXXXXXXXX",
  "messageType": "transaction",
  "text": "Your order #12345 has been confirmed and will arrive tomorrow.",
  "ttl": 86400
}

Promo Messages

Marketing campaigns with rich media:

{
  "id": "promo-summer-sale",
  "fromName": "YourBrand",
  "toPhone": "+380XXXXXXXXX",
  "messageType": "promo",
  "text": "Summer Sale! Up to 50% off. Shop now: https://example.com/sale",
  "ttl": 259200
}

Viber Survey

Interactive polls with 2-5 response options:

{
  "id": "survey-satisfaction",
  "fromName": "YourBrand",
  "toPhone": "+380XXXXXXXXX",
  "messageType": "viber_survey",
  "text": "How satisfied are you with our service?",
  "surveyOptions": [
    "Very Satisfied",
    "Satisfied",
    "Neutral",
    "Dissatisfied",
    "Very Dissatisfied"
  ],
  "ttl": 604800
}

Survey text maximum: 85 characters

Flash Call

Phone verification via automated call:

{
  "id": "verify-user-123",
  "fromName": "YourApp",
  "toPhone": "+380XXXXXXXXX",
  "messageType": "flashcall",
  "ttl": 300
}

Examples

Basic Transaction

curl -X POST https://restapi.smsbat.com/api/CascadeMessage/send_message/async \
  -H "Content-Type: application/json" \
  -H "X-Authorization-Key: your-api-key" \
  -d '[
    {
      "id": "tx-001",
      "fromName": "YourBank",
      "toPhone": "+380XXXXXXXXX",
      "messageType": "transaction",
      "text": "Payment of $100 was successful. Transaction ID: ABC123"
    }
  ]'

Scheduled Promo

curl -X POST https://restapi.smsbat.com/api/CascadeMessage/send_message/async \
  -H "Content-Type: application/json" \
  -H "X-Authorization-Key: your-api-key" \
  -d '[
    {
      "id": "promo-001",
      "fromName": "YourStore",
      "toPhone": "+380XXXXXXXXX",
      "messageType": "promo",
      "text": "Flash Sale starts in 1 hour! Visit: https://example.com",
      "scheduledSent": "2025-01-25T09:00:00Z",
      "ttl": 3600
    }
  ]'

Bulk Messages

curl -X POST https://restapi.smsbat.com/api/CascadeMessage/send_message/async \
  -H "Content-Type: application/json" \
  -H "X-Authorization-Key: your-api-key" \
  -d '[
    {
      "id": "bulk-001",
      "fromName": "YourBrand",
      "toPhone": "+380111111111",
      "messageType": "transaction",
      "text": "Message 1"
    },
    {
      "id": "bulk-002",
      "fromName": "YourBrand",
      "toPhone": "+380222222222",
      "messageType": "transaction",
      "text": "Message 2"
    },
    {
      "id": "bulk-003",
      "fromName": "YourBrand",
      "toPhone": "+380333333333",
      "messageType": "transaction",
      "text": "Message 3"
    }
  ]'

Response

Success Response

[
  {
    "messageId": "3fa85f64-5717-4562-b3fc-2c963f66afa6",
    "trackinId": "tx-001"
  },
  {
    "messageId": "8b2f1e9a-4c6d-4e2a-9f8b-1a3d5c7e9f0b",
    "trackinId": "tx-002"
  }
]

Response Fields

Field	Type	Description
messageId	string (UUID)	System message identifier
trackinId	string	Your tracking identifier (from request)

Use messageId for status tracking and trackinId for correlating with your system.

Implementation Examples

Python

import requests
from datetime import datetime, timedelta

class CascadeMessenger:
    def __init__(self, api_key):
        self.base_url = 'https://restapi.smsbat.com'
        self.headers = {
            'Content-Type': 'application/json',
            'X-Authorization-Key': api_key
        }

    def send_message(self, tracking_id, from_name, to_phone,
                     message_type, text, ttl=None, scheduled=None):
        """Send single cascade message"""
        message = {
            'id': tracking_id,
            'fromName': from_name,
            'toPhone': to_phone,
            'messageType': message_type,
            'text': text
        }

        if ttl:
            message['ttl'] = ttl

        if scheduled:
            message['scheduledSent'] = scheduled.isoformat()

        response = requests.post(
            f'{self.base_url}/api/CascadeMessage/send_message/async',
            headers=self.headers,
            json=[message]
        )

        response.raise_for_status()
        return response.json()[0]

    def send_bulk(self, messages):
        """Send multiple messages"""
        response = requests.post(
            f'{self.base_url}/api/CascadeMessage/send_message/async',
            headers=self.headers,
            json=messages
        )

        response.raise_for_status()
        return response.json()

# Usage
messenger = CascadeMessenger('your-api-key')

# Send single message
result = messenger.send_message(
    tracking_id='order-12345',
    from_name='YourStore',
    to_phone='+380XXXXXXXXX',
    message_type='transaction',
    text='Your order has been confirmed',
    ttl=86400
)

print(f"Message ID: {result['messageId']}")

# Send scheduled message
scheduled_time = datetime.now() + timedelta(hours=2)
result = messenger.send_message(
    tracking_id='promo-001',
    from_name='YourBrand',
    to_phone='+380XXXXXXXXX',
    message_type='promo',
    text='Sale starts now!',
    scheduled=scheduled_time
)

# Bulk send
messages = [
    {
        'id': f'bulk-{i}',
        'fromName': 'YourBrand',
        'toPhone': f'+38011111111{i}',
        'messageType': 'transaction',
        'text': f'Message {i}'
    }
    for i in range(100)
]

results = messenger.send_bulk(messages)
print(f"Sent {len(results)} messages")

JavaScript (Node.js)

const axios = require('axios');

class CascadeMessenger {
  constructor(apiKey) {
    this.baseUrl = 'https://restapi.smsbat.com';
    this.headers = {
      'Content-Type': 'application/json',
      'X-Authorization-Key': apiKey
    };
  }

  async sendMessage({ id, fromName, toPhone, messageType, text, ttl, scheduledSent }) {
    const message = {
      id,
      fromName,
      toPhone,
      messageType,
      text
    };

    if (ttl) message.ttl = ttl;
    if (scheduledSent) message.scheduledSent = scheduledSent;

    const response = await axios.post(
      `${this.baseUrl}/api/CascadeMessage/send_message/async`,
      [message],
      { headers: this.headers }
    );

    return response.data[0];
  }

  async sendBulk(messages) {
    const response = await axios.post(
      `${this.baseUrl}/api/CascadeMessage/send_message/async`,
      messages,
      { headers: this.headers }
    );

    return response.data;
  }

  async sendTelegramViber({ id, fromName, toPhone, messageType, text }) {
    const response = await axios.post(
      `${this.baseUrl}/api/CascadeMessage/send_message/tg-viber/async`,
      [{
        id,
        fromName,
        toPhone,
        messageType,
        text
      }],
      { headers: this.headers }
    );

    return response.data[0];
  }
}

// Usage
const messenger = new CascadeMessenger('your-api-key');

// Send single message
const result = await messenger.sendMessage({
  id: 'order-12345',
  fromName: 'YourStore',
  toPhone: '+380XXXXXXXXX',
  messageType: 'transaction',
  text: 'Your order has been confirmed',
  ttl: 86400
});

console.log('Message ID:', result.messageId);

// Send scheduled message
const scheduledTime = new Date(Date.now() + 2 * 60 * 60 * 1000);
await messenger.sendMessage({
  id: 'promo-001',
  fromName: 'YourBrand',
  toPhone: '+380XXXXXXXXX',
  messageType: 'promo',
  text: 'Sale starts now!',
  scheduledSent: scheduledTime.toISOString()
});

// Bulk send
const messages = Array.from({ length: 100 }, (_, i) => ({
  id: `bulk-${i}`,
  fromName: 'YourBrand',
  toPhone: `+38011111111${i}`,
  messageType: 'transaction',
  text: `Message ${i}`
}));

const results = await messenger.sendBulk(messages);
console.log(`Sent ${results.length} messages`);

PHP

<?php

class CascadeMessenger {
    private $baseUrl = 'https://restapi.smsbat.com';
    private $apiKey;

    public function __construct($apiKey) {
        $this->apiKey = $apiKey;
    }

    public function sendMessage($id, $fromName, $toPhone, $messageType,
                                $text, $ttl = null, $scheduledSent = null) {
        $message = [
            'id' => $id,
            'fromName' => $fromName,
            'toPhone' => $toPhone,
            'messageType' => $messageType,
            'text' => $text
        ];

        if ($ttl !== null) {
            $message['ttl'] = $ttl;
        }

        if ($scheduledSent !== null) {
            $message['scheduledSent'] = $scheduledSent;
        }

        $ch = curl_init($this->baseUrl . '/api/CascadeMessage/send_message/async');

        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, [
            'Content-Type: application/json',
            'X-Authorization-Key: ' . $this->apiKey
        ]);
        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode([$message]));

        $response = curl_exec($ch);
        curl_close($ch);

        $result = json_decode($response, true);
        return $result[0];
    }

    public function sendBulk($messages) {
        $ch = curl_init($this->baseUrl . '/api/CascadeMessage/send_message/async');

        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_POST, true);
        curl_setopt($ch, CURLOPT_HTTPHEADER, [
            'Content-Type: application/json',
            'X-Authorization-Key: ' . $this->apiKey
        ]);
        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($messages));

        $response = curl_exec($ch);
        curl_close($ch);

        return json_decode($response, true);
    }
}

// Usage
$messenger = new CascadeMessenger('your-api-key');

// Send single message
$result = $messenger->sendMessage(
    'order-12345',
    'YourStore',
    '+380XXXXXXXXX',
    'transaction',
    'Your order has been confirmed',
    86400
);

echo "Message ID: " . $result['messageId'] . "\n";

// Bulk send
$messages = [];
for ($i = 0; $i < 100; $i++) {
    $messages[] = [
        'id' => "bulk-$i",
        'fromName' => 'YourBrand',
        'toPhone' => "+38011111111$i",
        'messageType' => 'transaction',
        'text' => "Message $i"
    ];
}

$results = $messenger->sendBulk($messages);
echo "Sent " . count($results) . " messages\n";

Best Practices

Phone Numbers

Always use E.164 format: - ✅ +380XXXXXXXXX - ❌ 380XXXXXXXXX - ❌ 0XXXXXXXXX

Tracking IDs

• Use unique IDs for each message
• Include context in ID (e.g., order-12345, promo-summer-2025)
• Keep IDs under 255 characters
• Avoid special characters

TTL (Time-to-Live)

Recommended TTL values:

• OTP/Verification: 300-600 seconds (5-10 minutes)
• Transactional: 3600-86400 seconds (1-24 hours)
• Promotional: 86400-259200 seconds (1-3 days)
• Surveys: 604800 seconds (7 days)

Scheduled Messages

• Use UTC timezone for scheduledSent
• Don't schedule more than 30 days in advance
• Account for timezone differences
• Test with near-future schedules first

Bulk Sending

• Send in batches of 100-1000 messages
• Implement rate limiting
• Handle errors gracefully
• Retry failed messages

Error Handling

HTTP Status Codes

Code	Description
200	Success
400	Bad request - invalid parameters
401	Unauthorized - invalid API key
429	Too many requests
500	Server error

Error Response

{
  "error": {
    "code": "INVALID_PHONE",
    "message": "Invalid phone number format",
    "field": "toPhone"
  }
}

Retry Logic

async function sendWithRetry(message, maxRetries = 3) {
  for (let i = 0; i < maxRetries; i++) {
    try {
      return await messenger.sendMessage(message);
    } catch (error) {
      if (error.response?.status === 400) {
        // Don't retry validation errors
        throw error;
      }

      if (i === maxRetries - 1) throw error;

      // Exponential backoff
      await new Promise(resolve =>
        setTimeout(resolve, Math.pow(2, i) * 1000)
      );
    }
  }
}

Next Steps

• Message Variables - Use dynamic content
• Message Types - Explore message types
• Delivery Status - Track delivery