# Twilio Messaging MCP Server An MCP server for sending SMS messages via Twilio API. This server provides tools, resources, and prompts for interacting with the Twilio Messaging API. ## Features - Send SMS messages via Twilio - Get status callbacks from Twilio with enhanced handling via `@deshartman/mcp-status-callback` - Integrates with Claude AI via the Model Context Protocol (MCP) - Executable via npx for easy usage without installation ## Prerequisites - Node.js >= 18.0.0 - Twilio account with: - Account SID - API Key and Secret - Twilio phone number - ngrok account with: - Auth token - Custom domain (optional) ## Installation ```bash npm install @deshartman/twilio-messaging-mcp-server ``` Or run directly with npx: ```bash npx @deshartman/twilio-messaging-mcp-server ``` ### NPX Usage The package can be executed directly using npx without installation: ```bash # Run with required parameters npx @deshartman/twilio-messaging-mcp-server # With environment variables for ngrok env NGROK_AUTH_TOKEN=your_token NGROK_CUSTOM_DOMAIN=your_domain.ngrok.dev npx @deshartman/twilio-messaging-mcp-server ``` This is possible because the package includes the "bin" field in package.json, making it executable via npx. ## Environment Variables - `NGROK_AUTH_TOKEN`: Your ngrok authentication token (required for callback handling) - `NGROK_CUSTOM_DOMAIN`: Your custom ngrok domain (optional) ## Usage ### Running the Server You can run the server using the provided script with a `.env` file: ```bash # Create a .env file with your credentials # See .env.example for the required format # Run the server (no arguments needed) ./run-server.sh ``` The `.env` file should contain: ``` ACCOUNT_SID=YOUR_ACCOUNT_SID API_KEY=YOUR_API_KEY API_SECRET=YOUR_API_SECRET TWILIO_NUMBER=YOUR_TWILIO_PHONE_NUMBER NGROK_AUTH_TOKEN=YOUR_NGROK_AUTH_TOKEN NGROK_CUSTOM_DOMAIN=your-domain.ngrok.dev ``` This approach improves security by keeping credentials out of command history and simplifies the execution process. ### Directly with Node.js ```bash env NGROK_AUTH_TOKEN=your_ngrok_auth_token NGROK_CUSTOM_DOMAIN=your_domain.ngrok.dev node build/index.js ``` ## MCP Integration This server provides the following MCP capabilities: ### Tools - `send-sms`: Send an SMS message via Twilio with server readiness validation ### Resources - `twilio://statuscallback`: Get the last raw status callback data from Twilio with enhanced error handling ### Prompts - `SendSMS`: Prompt for sending an SMS using Twilio Messaging MCP Server ## Troubleshooting ### ngrok Tunnel Issues If you encounter an error like: ``` failed to start tunnel: The endpoint 'https://your-domain.ngrok.dev' is already online. ``` You have a few options: 1. Stop your existing endpoint first 2. Use a different domain name 3. Start both endpoints with `--pooling-enabled` to load balance between them ### ENOTEMPTY Error If you encounter an npm error like: ``` npm ERR! code ENOTEMPTY npm ERR! syscall rename ``` Try running the server directly with Node.js instead of using npx. ## License MIT