mattermost-mcp-server

This project implements a Model Context Protocol (MCP) server for Mattermost integration. It connects to Mattermost API endpoints to retrieve and process various information, making it available through standard MCP transports.

Features

• Connects to Mattermost API endpoints
• Supports multiple transport modes:
  • SSE (Server-Sent Events)
  • Standard I/O
• Real-time message processing
• Team and channel-specific monitoring
• Secure token-based authentication

Requirements

• Node.js >= 22
• npm >= 10
• dotenvx
  • dotenvx

Setup

1. Clone this repository:

git clone https://github.com/kakehashi-inc/mattermost-mcp-server.git
cd mattermost-mcp-server

2. Install dependencies:

npm install

3. Set up your environment variables:

# Create .env file
cp .env.example .env

# Encrypt your .env file (optional but recommended for production)
dotenvx encrypt

Required environment variables:

• MCP_PORT: Port number for SSE transport mode (default: 8201)
• MATTERMOST_ENDPOINT: Your Mattermost server URL
• MATTERMOST_TOKEN: Your Mattermost authentication token
• MATTERMOST_TEAM_ID: The ID of the team to monitor
• MATTERMOST_CHANNELS: Comma-separated list of channel names to monitor

4. Build the server:

npm run build

Usage

The server can be run in two transport modes:

SSE Transport Mode

npm start

Standard I/O Transport Mode

npm start -- --stdio

Development

• npm run dev: Start the server in development mode with hot reload
• npm run lint: Run ESLint
• npm run format: Format code using Prettier
• npm test: Run tests
• npm run inspect: Run MCP inspector

References

• Model Context Protocol TypeScript SDK
• MCP inspector

License

MIT