Mattermost Fetch MCP server

The MCP server for Mattermost integration connects to Mattermost API endpoints to retrieve and process various information from your Mattermost workspace, making it available through standard Model Context Protocol (MCP) transports. This allows AI assistants like Claude to access your Mattermost data securely.

Requirements

• Node.js >= 22
• npm >= 10

Installation

Clone and Set Up

1. Install the package using npm:

npm install mcp-server-mattermost

Alternatively, you can run it directly with npx:

npx mcp-server-mattermost

Environment Configuration

You'll need to set up the following environment variables:

Required Variables:

• MATTERMOST_ENDPOINT: Your Mattermost server URL
• MATTERMOST_TOKEN: Your Mattermost authentication token
• MATTERMOST_TEAM: The name of the team to monitor
• MATTERMOST_CHANNELS: Comma-separated list of channel names to monitor

Setup Options:

Option 1: Direct Environment Variables

export MATTERMOST_ENDPOINT="https://your-mattermost-server.com"
export MATTERMOST_TOKEN="your-token-here"
export MATTERMOST_TEAM="your-team-name"
export MATTERMOST_CHANNELS="general,random,dev"

Option 2: Using .env file (with dotenvx)

# Install dotenvx (optional)
npm install -g @dotenvx/dotenvx

# Create .env file
cp .env.example .env
# Edit .env file with your values

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

Usage

The server supports three transport modes: stdio (default), sse, and http-stream.

Standard I/O Transport Mode

# Using npm scripts (with dotenvx)
npm run start:stdio

# Direct execution
node dist/main.js --transport stdio

# Using npx
npx mcp-server-mattermost --transport stdio

SSE Transport Mode

# Using npm scripts (with dotenvx)
npm run start:sse

# Direct execution
node dist/main.js --transport sse

HTTP Transport Mode

# Using npm scripts (with dotenvx)
npm run start:http

# Direct execution
node dist/main.js --transport http-stream

Claude Desktop Integration

To use this MCP server with Claude Desktop, add the following configuration to your Claude Desktop settings:

Sample Configuration

{
  "mcpServers": {
    "mattermost": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-server-mattermost@latest",
        "--transport", "stdio",
        "--endpoint", "https://your-mattermost-server/api/v4",
        "--token", "your_personal_access_token",
        "--team", "your_team_name",
        "--channels", "town-square,general,your_channel_name"
      ]
    }
  }
}

Server Features

• Secure, token-based connection to Mattermost API endpoints
• Support for multiple transport modes: stdio, http-stream, and sse
• Search functionality for messages across multiple Mattermost channels
• Customizable default channels and message fetch limits

How to install this MCP server

For Claude Code

To add this MCP server to Claude Code, run this command in your terminal:

claude mcp add-json "mattermost" '{"command":"npx","args":["-y","mcp-server-mattermost@latest","--transport","stdio","--endpoint","https://your-mattermost-server/api/v4","--token","your_personal_access_token","--team","your_team_name","--channels","town-square,general,your_channel_name"]}'

See the official Claude Code MCP documentation for more details.

For Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > Tools & Integrations and click "New MCP Server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

{
    "mcpServers": {
        "mattermost": {
            "command": "npx",
            "args": [
                "-y",
                "mcp-server-mattermost@latest",
                "--transport",
                "stdio",
                "--endpoint",
                "https://your-mattermost-server/api/v4",
                "--token",
                "your_personal_access_token",
                "--team",
                "your_team_name",
                "--channels",
                "town-square,general,your_channel_name"
            ]
        }
    }
}

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explicitly ask the agent to use the tool by mentioning the tool name and describing what the function does.

For Claude Desktop

To add this MCP server to Claude Desktop:

1. Find your configuration file:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json
• Linux: ~/.config/Claude/claude_desktop_config.json

2. Add this to your configuration file:

{
    "mcpServers": {
        "mattermost": {
            "command": "npx",
            "args": [
                "-y",
                "mcp-server-mattermost@latest",
                "--transport",
                "stdio",
                "--endpoint",
                "https://your-mattermost-server/api/v4",
                "--token",
                "your_personal_access_token",
                "--team",
                "your_team_name",
                "--channels",
                "town-square,general,your_channel_name"
            ]
        }
    }
}

3. Restart Claude Desktop for the changes to take effect