n8n-nodes-telegram-mtproto-client

This is a comprehensive Telegram Client node for n8n that allows you to interact with Telegram as a regular user (not a bot). It provides access to advanced Telegram features that are not available through the regular bot API.

Features

• 🔐 Full user authentication support
• 📝 Complete message operations (send, edit, delete, pin)
• 📸 Media handling (photos, videos, documents)
• 👥 Chat management (join, leave, history)
• 📢 Channel creation and management:
  • Create broadcast channels or supergroups
  • Invite users in a single operation
  • Manage channel settings and permissions
• 💾 Session management for persistent authentication
• ⚡ Real-time updates and notifications
• 🔒 Secure credential storage

Installation

Community Node (Recommended)

For n8n v0.214.0 and above:

1. Go to Settings > Community Nodes
2. Click on Install a node from NPM
3. Enter n8n-nodes-telegram-mtproto-client
4. Click Install

Manual Installation

For n8n versions below v0.214.0 or for manual installation:

1. Install n8n with npm install n8n -g
2. Navigate to your n8n user data directory: ~/.n8n/ or create it if it doesn't exist
3. Install the node:

cd ~/.n8n
npm install n8n-nodes-telegram-mtproto-client

From Source

If you want to install from source or contribute to development:

# Clone the repository
git clone https://github.com/pvdyck/n8n-nodes-telegram-mtproto-client.git

# Install dependencies
cd n8n-nodes-telegram-mtproto-client
npm install

# Build the node
npm run build

Configuration

Prerequisites

Before you can use this node, you need to register your application with Telegram:

1. Go to my.telegram.org and log in with your Telegram account
2. Click on API development tools
3. Fill in the required fields (app title, short name, etc.)
4. Click on Create application
5. Note down your api_id and api_hash - you'll need these for the node configuration

Setting up Credentials in n8n

1. Go to Credentials in your n8n instance
2. Click Create New Credentials
3. Select Telegram Client API from the list
4. Fill in the following details:
   • API ID: The api_id from my.telegram.org
   • API Hash: The api_hash from my.telegram.org
   • Phone Number: Your Telegram phone number in international format (e.g., +1234567890)
   • 2FA Password: Your Two-Factor Authentication password (if enabled on your account)
5. Click Create to save your credentials

First Use Authentication

When using the node for the first time, you'll need to complete the authentication process:

1. Add the Telegram Client node to your workflow
2. Select your credentials
3. Execute the workflow
4. You'll be prompted for a verification code that Telegram sends to your account
5. Enter the code in the n8n execution modal
6. The session will be saved for future use, and you won't need to authenticate again

Usage

Available Operations

The node provides a wide range of operations to interact with Telegram:

Message Operations

• sendMessage: Send text messages to users, groups, or channels
• replyToMessage: Reply to existing messages
• editMessage: Edit messages you've previously sent
• deleteMessages: Delete messages from chats
• forwardMessages: Forward messages between chats
• pinMessage: Pin important messages in chats

Media Operations

• sendMedia: Send photos, videos, documents, or audio files
• sendAlbum: Send multiple media files as an album (up to 10 files)
• downloadMedia: Download media from messages to use in your workflow

Chat Operations

• getChatHistory: Retrieve message history from a chat
• joinChat: Join public channels or groups
• leaveChat: Leave channels or groups
• getChats: Get a list of your chats
• getDialogs: Get recent conversations
• createChannelAndInvite: Create a new channel/supergroup and invite users to it

Example Workflows

Basic Message Sending

{
  "operation": "sendMessage",
  "chatId": "@username or chat_id",
  "messageText": "Hello from n8n!",
  "parseMode": "HTML",
  "disableWebPagePreview": false,
  "disableNotification": false
}

Sending Media with Caption

{
  "operation": "sendMedia",
  "chatId": "@username or chat_id",
  "filePath": "/path/to/file.jpg",
  "mediaType": "photo",
  "caption": "Check out this image!",
  "parseMode": "HTML"
}

Forwarding Messages

{
  "operation": "forwardMessages",
  "fromChatId": "@source_chat",
  "toChatId": "@destination_chat",
  "messageIds": [123, 124, 125]
}

Getting Chat History

{
  "operation": "getChatHistory",
  "chatId": "@username or chat_id",
  "limit": 50,
  "offsetId": 0
}

Creating a Channel and Inviting Users

The createChannelAndInvite operation allows you to create a new Telegram channel or supergroup and invite users to it in a single operation. This is more efficient than creating a channel and then inviting users separately.

{
  "operation": "createChannelAndInvite",
  "channelTitle": "My New Channel",
  "channelDescription": "This is a channel created via n8n",
  "channelType": "supergroup",
  "usersToInvite": "@user1, @user2, @user3"
}

Important Notes:

• For user invitations, only usernames with the @ prefix are supported (e.g., @username)
• User IDs are not supported for invitations
• Users must exist on Telegram and be accessible to your account
• Some users may have privacy settings that prevent being added to groups
• You can create a channel without inviting users by leaving the usersToInvite field empty
• There are limits to how many channels you can create and how many users you can invite

Response Format:

{
  "success": true,
  "channelId": 1234567890,
  "accessHash": "123456789abcdef",
  "title": "My New Channel",
  "about": "This is a channel created via n8n",
  "type": "Supergroup",
  "link": "https://t.me/c/1234567890",
  "invitedUsers": [
    {
      "id": 123456789,
      "firstName": "John",
      "lastName": "Doe",
      "username": "user1"
    }
  ],
  "invitationStats": {
    "total": 3,
    "successful": 1,
    "failed": 2
  },
  "createdAt": "2023-06-15T12:34:56.789Z"
}

Common Errors:

• CHANNELS_TOO_MUCH: You've reached the maximum number of channels you can create or join
• USER_RESTRICTED: Your account is restricted from creating new channels
• CHAT_TITLE_EMPTY: The channel title cannot be empty
• CHAT_ABOUT_TOO_LONG: The channel description is too long
• USER_PRIVACY_RESTRICTED: Some users could not be invited due to their privacy settings

Error Handling and Troubleshooting

The node includes comprehensive error handling for various scenarios:

Common Errors and Solutions

Error	Possible Cause	Solution
Authentication Failed	Incorrect API ID/Hash	Double-check credentials at my.telegram.org
Phone Code Invalid	Incorrect verification code	Request a new code and try again
Session Expired	Long period of inactivity	Re-authenticate with your phone number
Flood Wait	Too many requests	Wait for the specified time before retrying
Not Authorized	Session not established	Complete the authentication process
Peer ID Invalid	Incorrect chat ID format	Use correct format (@username or numeric ID)

Security Features

• ✅ Credentials are stored securely in n8n's encrypted storage
• ✅ Session strings are encrypted to prevent unauthorized access
• ✅ Full support for Two-Factor Authentication (2FA)
• ✅ No plaintext password storage
• ✅ Automatic session management

Development

This section is for developers who want to contribute to the node or customize it for their needs.

Build Process

# Install dependencies
npm install

# Build the node
npm run build

# Development with auto-rebuild
npm run dev

Code Quality

# Format code
npm run format

# Lint code
npm run lint

# Fix linting issues
npm run lintfix

Contributing

Contributions are welcome and appreciated! Here's how you can contribute:

1. Fork the repository
2. Create your feature branch (git checkout -b feature/AmazingFeature)
3. Commit your changes (git commit -m 'Add some AmazingFeature')
4. Push to the branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

Please make sure your code follows the existing style and includes appropriate tests.

License

This project is licensed under the MIT License - see the LICENSE file for details.

Support

If you encounter any issues or have questions:

• Create an issue on GitHub
• Check existing issues for solutions
• Contact the maintainer

Acknowledgments

• Telegram Client API for providing the underlying functionality
• n8n team and community for the amazing workflow automation platform
• All contributors who have helped improve this node

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