Mattermost MCP Server

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

Clone this repository:

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

Install dependencies:

npm install

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

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

License

MIT

Deploy Server

HTTP connection URL

security – no known vulnerabilities

license - permissive license

quality - confirmed to work

How are these scores calculated?

remote-capable server

The server can be hosted and run remotely because it primarily relies on remote services or has no dependency on the local environment.

Tools

mattermost_search

A Model Context Protocol server that connects to Mattermost, allowing AI models to monitor and process messages from specific teams and channels in real-time via SSE or Standard I/O transport modes.

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