MCP Server for Universal Connectivity JS-Peer

A Model Context Protocol (MCP) server that provides programmatic access to js-libp2p universal-connectivity functionality, enabling AI assistants to interact with peer-to-peer networks, manage connections, send messages, and share files.

Features

🔗 Node Management

• Create and configure libp2p nodes with custom transports
• Start/stop nodes with graceful shutdown
• Monitor node status and addresses
• Support for WebRTC, WebSockets, and WebTransport

👥 Peer Management

• Discover peers using pubsub peer discovery
• Connect to peers via multiaddr or peer ID
• Manage active connections
• Ping peers to test connectivity
• Access peer store information

💬 Messaging

• Send messages to pubsub topics (group chat)
• Send direct messages to specific peers
• Subscribe/unsubscribe to topics
• Retrieve message history
• Get topic subscriber lists

📁 File Sharing

• Share files using the file exchange protocol
• Request files from peers
• Announce file availability to the network
• List shared files with metadata

📊 Network Monitoring

• Real-time network statistics
• Protocol handler information
• Debug logging configuration
• Peer store insights

Usage

Starting the MCP Server

• Run the MCP Server in terminal

npm start

• Connect with Claude Desktop App via Edit Config in File Navbar --> Settings --> Developer Tab or just press Ctrl + , to open settings menu and edit the config file in any IDE as below:

claude_desktop_config.json

{
  "mcpServers": {
    "universal-connectivity": {
      "command": "node",
      "args": ["path-to-file-location/js-peer-mcp-server/dist/index.js"], //  C:/js-peer-mcp-server/dist/index.js
      "env": {}
    }
  }
}

• Close and Reopen the Claude Desktop App and a New Chat, you will now be able to view the universal-connectivity option in search and tools button of the input area.

ALWAYS ENSURE YOUR MCP SERVER IS RUNNING VIA npm start TO ACTIVATE THE JS-LIBP2P related operations

• Go ahead and chat with Claude for any libp2p related commands and it will present you with relevant results seamlessly! incredible, right?

Try this commands to get started:-

create libp2p node, 'start libp2p node', 'stop libp2p node', 'get node status'

• You can Further change permission access for this mcp-server through the left-bottom Your Account tab --> Settings --> Integrations --> universal-connectivity: tools and settings options:

Basic Operations

1. Create and Start a Node

{
  "method": "create_libp2p_node",
  "params": {
    "transports": ["webrtc", "websockets", "webtransport"],
    "enableRelay": true
  }
}

2. Connect to the Network

{
  "method": "discover_peers",
  "params": {
    "timeout": 10000
  }
}

3. Send a Group Message

{
  "method": "send_group_message", 
  "params": {
    "topic": "universal-connectivity",
    "message": "Hello from MCP!"
  }
}

4. Share a File

{
  "method": "share_file",
  "params": {
    "filePath": "/path/to/file.txt",
    "announce": true
  }
}

Available Tools

Node Management

• create_libp2p_node - Initialize a new libp2p node
• start_libp2p_node - Start the libp2p node
• stop_libp2p_node - Stop the libp2p node
• get_node_status - Get current node status

Peer Management

• discover_peers - Discover peers on the network
• connect_to_peer - Connect to a specific peer
• disconnect_from_peer - Disconnect from a peer
• list_connections - List active connections
• get_peer_info - Get detailed peer information
• ping_peer - Ping a peer to test connectivity

Messaging

• send_group_message - Send message to a topic
• send_direct_message - Send private message to a peer
• subscribe_to_topic - Subscribe to a pubsub topic
• unsubscribe_from_topic - Unsubscribe from a topic
• get_message_history - Retrieve message history
• get_topic_subscribers - Get topic subscriber list

File Sharing

• share_file - Share a file with the network
• request_file - Request a file from a peer
• list_shared_files - List available shared files
• announce_file - Announce file availability

Monitoring

• get_network_stats - Get network statistics
• get_protocol_handlers - List protocol handlers
• enable_debug_logging - Configure debug logging
• get_peer_store_info - Get peer store information

Available Resources

• connections://active - Current active connections
• peers://discovered - Recently discovered peers
• network://stats - Network statistics
• node://info - Node information and status
• files://shared - Shared files catalog
• messages://topic/{topicName} - Messages for specific topic
• messages://peer/{peerId} - Direct messages with specific peer

Configuration

The server supports various configuration options:

interface NodeConfig {
  transports?: string[]           // ['webrtc', 'websockets', 'webtransport']
  enableRelay?: boolean          // Enable circuit relay (default: true)
  bootstrapPeers?: string[]      // Custom bootstrap peer multiaddrs
  listenAddresses?: string[]     // Custom listen addresses
}

Protocol Support

• WebRTC: Browser-to-browser connections
• WebSockets: Traditional WebSocket connections
• WebTransport: Modern QUIC-based transport
• Circuit Relay: NAT traversal and hole punching
• Gossipsub: Publish-subscribe messaging
• Direct Messages: Peer-to-peer messaging protocol
• File Exchange: Custom file sharing protocol

Error Handling

The server provides comprehensive error handling with descriptive messages:

• Connection failures and timeouts
• Invalid peer IDs or multiaddrs
• Network protocol errors
• File transfer interruptions
• Message delivery failures

Development

# Install dependencies
npm install

# Build the project
npm run build

# Run in development mode
npm run dev

# Run tests
npm run test

# Lint code
npm run lint

# Format code
npm run format

Architecture

The MCP server is built with a modular architecture:

• State Manager: Centralized state management
• Tool Handlers: Organized by functionality (node, peer, messaging, etc.)
• Resource Providers: Dynamic resource access
• Protocol Integration: Direct integration with libp2p protocols

Contributing

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Add tests for new functionality
5. Submit a pull request

Related Projects

• libp2p - Modular peer-to-peer networking stack
• universal-connectivity - Universal connectivity examples
• Model Context Protocol - MCP specification