MCP Servers

mu-mcp

An MCP server that enables querying, viewing, and interacting with local emails through the mu mail indexer. It allows users to search messages, read email content, and open attachments directly from Claude Desktop and other MCP clients.

README

mu-mcp: MCP Server for the `mu` Mail Indexer

A Model Context Protocol (MCP) server for querying your local mu mail index. This server enables fast, structured mail search from Claude Desktop and other MCP clients.

Features

Stdio MCP server for easy integration
Three tools: query, view emails and open attachments (using default OS viewer).
Fast, flexible mail search using the mu index
Claude Desktop ready: simple installation and config
Python, uv, and MCP SDK based

Installation

Clone this repository and install dependencies:

git clone https://github.com/danielfleischer/mu-mcp.git
cd mu-mcp
uv venv
uv pip install .

Usage

Run the MCP Server

With uv:

uv run --directory . mcp run mu_mcp/mu_mcp.py

Or directly with Python:

python mu_mcp/mu_mcp.py

Claude Desktop Integration

Add to your claude_desktop_config.json:

"mcpServers": {
  "mu_mcp": {
    "command": "uv",
    "args": [
      "run",
      "--directory",
      "PROJECT_PATH",
      "mcp",
      "run",
      "mu_mcp/mu_mcp.py"
    ]
  }
}

Replace PROJECT_PATH with the path to your cloned repo.

Query

Ask Claude to find emails, e.g. "Find emails with a PDF attachment that were sent last April and open the PDF", "Show me the email I received from Alice last week", or "Find emails with the subject 'Meeting Notes'".

Development

[x] Adding a tool to view an email.
[x] Adding a tool to find and download attachments.

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