Mattermost MCP Server: Install & Setup

Install Mattermost in Claude Code

Claude Code

claude mcp add toffguy77-mattermost -e MATTERMOST_URL=... -- uvx mattermost-mcp-server

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "toffguy77-mattermost": {
      "command": "uvx",
      "args": [
        "mattermost-mcp-server"
      ],
      "env": {
        "MATTERMOST_URL": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the Mattermost MCP server do?

Mattermost: read unreads, mentions, channels and threads; opt-in posting, edits, reactions

Is the Mattermost MCP server free?

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Does Mattermost run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add Mattermost to Claude Code?

Run: claude mcp add toffguy77-mattermost -e MATTERMOST_URL=... -- uvx mattermost-mcp-server

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