ExotelMCP

exotel/ExotelMCP

3.3

If you are the rightful owner of ExotelMCP and would like to certify it and/or have it hosted online, please leave a comment on the right or send an email to henry@mcphub.com.

ExotelMCP is a Model Context Protocol server that integrates Claude AI with Exotel's communication APIs for SMS and voice services.

ExotelMCP

A Model Context Protocol (MCP) server that provides seamless integration between Claude AI and Exotel's communication APIs for SMS and voice calling services, plus quick audio tools.

Features

  • 📱 SMS Services: Send single, bulk, and dynamic SMS messages with DLT compliance
  • ☎️ Voice Calling: Initiate voice calls, connect numbers, and integrate with call flows
  • 📊 Status Tracking: Real-time delivery status and callback management
  • 🎵 Quick Audio Tools: One-click audio playback, download, and web player access
  • 🔐 Secure Authentication: Token-based authentication system
  • 🤖 Claude AI Integration: Direct integration with Claude through MCP protocol

Table of Contents

Prerequisites

Before using the Exotel MCP Server, ensure you have:

  • Claude Desktop App: Latest version installed
  • Node.js and npm: Required for MCP remote connection
  • Exotel Account: Active account with API credentials
  • MCP Remote Package: Install if not already available

Installing MCP Remote

If you don't have mcp-remote installed, run:

npm install -g mcp-remote

Verify installation:

npm list -g mcp-remote

Claude Desktop Configuration

To integrate ExotelMCP with Claude, add the following configuration to your Claude desktop settings:

Location: Claude Desktop → Settings → Developer → Edit Config

{
  "mcpServers": {
    "exotel": {
      "command": "npx",
      "args": [
        "mcp-remote",
        "https://mcp.exotel.com/mcp",
        "--header",
        "Authorization:${AUTH_HEADER}"
      ],
      "env": {
        "AUTH_HEADER": "{'token':'YOUR_EXOTEL_TOKEN','from_number':'YOUR_FROM_NUMBER','dlt_temp':'YOUR_DLT_TEMPLATE','dlt_entity':'YOUR_DLT_ENTITY','caller_id':'YOUR_CALLER_ID','api_domain':'https://YOUR_SUB_DOMAIN','account_sid':'YOUR_ACCOUNT_SID','exotel_portal_url':'YOUR_EXOTEL_DASHBOARD_BASE_URL'}"
      }
    }
  }
}

Required Credentials

Replace the placeholder values with your actual Exotel credentials:

YOUR_EXOTEL_TOKEN: Base64 Encoded API Credentials

This token is created by encoding your Exotel API Key and Secret in Base64 format.

Step 1: Get your API credentials from Exotel Dashboard

  1. Log into your Exotel Dashboard
  2. Navigate to Settings → API Settings
  3. Copy your API Key and API Secret

Step 2: Create the Base64 token

Format: api_key:api_secret (colon-separated)

Example: If your API Key is abc123 and API Secret is xyz789, combine them as: abc123:xyz789

Step 3: Encode to Base64

You can use any of these methods:

Online Tool:

  • Visit base64encode.org
  • Enter your api_key:api_secret string
  • Copy the encoded result

Command Line (Mac/Linux):

echo -n "your_api_key:your_api_secret" | base64

Command Line (Windows):

[Convert]::ToBase64String([Text.Encoding]::UTF8.GetBytes("your_api_key:your_api_secret"))
Other Required Values:
  • YOUR_FROM_NUMBER: Your registered Exotel phone number (from Dashboard → Numbers)
  • YOUR_DLT_TEMPLATE: DLT template ID for SMS compliance (from Dashboard → DLT)
  • YOUR_DLT_ENTITY: DLT entity ID for SMS compliance (from Dashboard → DLT)
  • YOUR_CALLER_ID: Your registered caller ID (from Dashboard → Numbers)
  • YOUR_ACCOUNT_SID: Your Exotel account SID (from Dashboard → API Settings)
  • YOUR_SUB_DOMAIN: Your Exotel account SubDomain (from Dashboard → API Settings)
  • YOUR_EXOTEL_DASHBOARD_BASE_URL: Your Exotel Dashboard base url

Usage

Once configured, you can use Claude to interact with Exotel services using natural language commands. Simply describe what you want to do, and Claude will handle the API calls through the MCP server.

Example Commands:

  • "Send an SMS to +919999999999 saying 'Hello from Claude!'"
  • "Call +919999999999"
  • "Check the delivery status of my last SMS"
  • "Connect +919999999999 with +919888888888"

Audio Commands:

API Services

SMS Services

Send Individual SMS

Send a single SMS message to a specific phone number with DLT compliance.

Example:

Send an SMS to +919999999999 with message "Hello from Claude!" using DLT template 1107160086208866373 and entity 1101428740000012125
Send Bulk SMS (Same Message)

Send the same message to multiple recipients at once.

Example:

Send "Welcome to our service!" to these numbers: +919999999999, +919888888888, +919777777777
Send Dynamic Bulk SMS

Send personalized messages to multiple recipients with different content for each.

Example:

Send personalized messages: "Hello John" to +919999999999 and "Hello Jane" to +919888888888

Voice Services

Make Voice Call

Initiate a voice call to any phone number using your registered Exotel number.

Example:

Call +919999999999 from my registered number
Connect Two Numbers

Bridge two phone numbers in a single call, connecting them together.

Example:

Connect +919999999999 with +919888888888 in a conference call
Call Flow Integration

Connect a phone number to a predefined Exotel call flow or IVR system.

Example:

Connect +919999999999 to call flow app_id 12345

Status & Tracking Services

Check SMS Delivery Status

Get real-time delivery status and details for sent SMS messages.

Example:

Check the delivery status of SMS sent to +919999999999
Check Voice Call Status

Retrieve call details, duration, and status for voice calls.

Example:

Get call details for calls made to +919999999999
Get Call History

Retrieve bulk call details and history for analysis.

Example:

Get all call details made from +919999999999
Number Information

Get metadata and information about phone numbers.

Example:

Get information about phone number +919999999999

Audio Services

Quick Audio Tools

Quick one-click audio playback and management tools.

Quick Play Audio

Get instant clickable links to play any audio URL in your browser.

Example:

Play audio from https://example.com/song.mp3
Open Audio Player

Access the web-based audio player interface for full control.

Example:

Open the audio player interface
Quick Download

Get direct download links for any audio file.

Example:

Download audio from https://example.com/song.mp3

Authentication

The Exotel MCP Server uses secure token-based authentication. All your Exotel credentials are configured in the Claude desktop configuration and are used to authenticate with Exotel's APIs.

Security Features

  • Secure Token Handling: Your Exotel API tokens are securely processed
  • User Isolation: Each user's data is kept separate and secure
  • DLT Compliance: Built-in support for DLT (Distributed Ledger Technology) requirements for SMS in India

Getting Your Exotel Credentials

  1. Log into your Exotel Dashboard
  2. Navigate to Settings → API Settings to get your API Key, API Secret, and Account SID
  3. Go to Numbers section to note your registered phone numbers and caller IDs
  4. Visit DLT section to get your DLT Template and Entity IDs (required for SMS compliance in India)
  5. Create your Base64 token using the API Key and Secret as detailed in the Configuration section

All these credentials should be properly formatted and added to your Claude configuration as shown above.

Hosting & Deployment

🌐 IMPORTANT: Public Domain Requirement

This application MUST be hosted with a public domain and HTTPS enabled for the following reasons:

  1. MCP Remote Connection: Claude Desktop connects to your server via the public internet
  2. Exotel Webhooks: Exotel needs to send callback notifications to your server
  3. Security: HTTPS is required for secure communication between Claude and your server
  4. Production Ready: Ensures reliable service for SMS/voice status updates

Deployment Option

Docker Setup
FROM openjdk:21-jdk-slim

WORKDIR /app
COPY target/mcp_api-0.0.1-SNAPSHOT.jar app.jar

EXPOSE 8080
CMD ["java", "-jar", "app.jar"]

# Build and run
docker build -t exotel-mcp .
docker run -p 8080:8080 -e EXOTEL_BASE_URL=https://your-domain.com exotel-mcp
Docker Compose with HTTPS
version: '3.8'
services:
  app:
    build: .
    ports:
      - "8080:8080"
    environment:
      - EXOTEL_BASE_URL=https://your-domain.com
  
  nginx:
    image: nginx:alpine
    ports:
      - "80:80"
      - "443:443"
    volumes:
      - ./nginx.conf:/etc/nginx/nginx.conf
      - ./ssl:/etc/ssl/certs

Environment Configuration

Production Environment Variables
# Server Configuration
SERVER_PORT=8080
SPRING_PROFILES_ACTIVE=production

# Application URL (CRITICAL - must match your domain)
EXOTEL_BASE_URL=https://your-domain.com

# Security
SPRING_SECURITY_REQUIRE_SSL=true

# Logging
LOGGING_LEVEL_ROOT=WARN
LOGGING_LEVEL_COM_EXAMPLE_MCP_API=INFO
Update Claude Configuration
{
  "mcpServers": {
    "exotel": {
      "command": "npx",
      "args": [
        "mcp-remote",
        "https://your-domain.com/mcp",
        "--allow-http"  // remove this if your server running on https.
        "--header",
        "Authorization:${AUTH_HEADER}"
      ],
      "env": {
        "AUTH_HEADER": "{'token':'YOUR_EXOTEL_TOKEN','from_number':'YOUR_FROM_NUMBER','dlt_temp':'YOUR_DLT_TEMPLATE','dlt_entity':'YOUR_DLT_ENTITY','caller_id':'YOUR_CALLER_ID','api_domain':'https://YOUR_SUB_DOMAIN','account_sid':'YOUR_ACCOUNT_SID','exotel_portal_url':'YOUR_EXOTEL_DASHBOARD_BASE_URL'}"
      }
    }
  }
}

Production Checklist

  • Domain: Registered and DNS configured
  • HTTPS: SSL certificate installed and working
  • Server: Application running on port 8080
  • Firewall: Ports 80, 443, and 8080 open
  • Monitoring: Health checks and logging configured
Audio Service Requirements

Quick Audio Tools:

  • ✅ Works on any server with internet access
  • ✅ No special hardware needed
  • ✅ Browser-based playback
  • ✅ Supports all common audio formats (mp3, wav, ogg, etc.)

Testing Your Deployment

1. Test MCP Endpoint
curl https://your-domain.com/mcp
# Should return data: {"type": "connection_established"}
3. Test with Claude
  • Update Claude configuration with your domain
  • Restart Claude Desktop
  • Send test message: "Send a test SMS to +919999999999 using DltEntityId=XXXXXXX, From=EXOTEL,DltTemplateId=XXXXXXXXX"

Troubleshooting Deployment

Connection Issues
  • Check firewall settings
  • Verify DNS propagation: nslookup your-domain.com
  • Test HTTPS: curl -I https://your-domain.com
Application Issues
  • Check application logs: tail -f logs/mcp-server.log
  • Verify environment variables
  • Test database connection
Callback Issues
  • Ensure webhooks can reach your server
  • Check Exotel callback URL configuration
  • Verify HTTPS is working for callbacks

Support

Getting Help

  • Configuration Issues: Double-check your Exotel credentials and Claude configuration
  • Deployment Issues: Verify domain, HTTPS, and server accessibility
  • API Usage: Refer to the API Services section for usage examples
  • Exotel Account: Contact Exotel support for account-related issues
  • DLT Compliance: Ensure your DLT templates and entity IDs are properly registered

Common Issues

"Connection Failed" Error
  • Verify your domain is accessible: curl https://your-domain.com/mcp
  • Check your mcp-remote installation: npm list -g mcp-remote
  • Ensure HTTPS is properly configured
  • Verify firewall allows incoming connections on port 443
"Authentication Failed" Error
  • Verify your Exotel API token is correctly Base64 encoded from api_key:api_secret format
  • Double-check your API Key and API Secret from Exotel Dashboard → Settings → API Settings
  • Ensure the colon (:) separator is included between API Key and Secret before encoding
  • Check that your account SID matches your Exotel account
  • Ensure your phone numbers are properly registered with Exotel
SMS Not Delivered
  • Verify DLT template and entity IDs are correct
  • Check that your message content matches the registered DLT template
  • Ensure the recipient number is valid and reachable
  • Check callback webhook is receiving status updates
Webhook/Callback Issues
  • Verify your server is accessible from the internet
  • Check HTTPS certificate is valid
  • Ensure callback URLs use your public domain
  • Test webhook endpoints manually

Resources

🌐 Remember: This application requires a public domain with HTTPS for production use. The domain is essential for Claude Desktop connectivity and Exotel webhook delivery.

🚀 Ready to deploy? Follow the hosting guide above and start sending SMS, making calls, and using audio tools through Claude AI!