Apple Mail MCP

Apple Mail MCP

A fast MCP (Model Context Protocol) server for Apple Mail, using optimized JXA (JavaScript for Automation) scripts with batch property fetching for 87x faster performance, plus an optional FTS5 search index for 700-3500x faster body search (~2ms vs ~7s).

Features

Email Tools (5 total)

Unified get_emails() Filters

get_emails()                      # All emails (default)
get_emails(filter="unread")       # Unread emails only
get_emails(filter="flagged")      # Flagged emails only
get_emails(filter="today")        # Emails received today
get_emails(filter="this_week")    # Emails from last 7 days

Unified search() Scopes

search("invoice")                          # Search everywhere (uses FTS5)
search("[email protected]", scope="sender") # Sender only
search("meeting notes", scope="subject")   # Subject only
search("deadline", scope="body")           # Body content only

Installation

No installation required

Use pipx run to run directly from PyPI:

pipx run apple-mail-mcp

With pipx (optional)

For faster startup, install globally:

pipx install apple-mail-mcp

From source

Requires Python 3.11+ and uv:

git clone https://github.com/imdinu/apple-mail-mcp
cd apple-mail-mcp
uv sync

Quick Start

1. Add to Claude Code

{
  "mcpServers": {
    "mail": {
      "command": "apple-mail-mcp"
    }
  }
}

2. Build the Search Index (Optional but Recommended)

For instant body search (~2ms instead of ~7s), build the FTS5 index:

# Grant Full Disk Access to Terminal first:
# System Settings → Privacy & Security → Full Disk Access → Add Terminal

apple-mail-mcp index --verbose
# → Indexed 22,696 emails in 1m 7.6s
# → Database size: 130.5 MB

3. Use with Claude

Once configured, you can search emails, get today's messages, find unread emails, and more through natural conversation.

CLI Commands

apple-mail-mcp            # Run MCP server (default)
apple-mail-mcp serve      # Run MCP server explicitly
apple-mail-mcp --watch    # Run with real-time index updates
apple-mail-mcp index      # Build search index from disk
apple-mail-mcp status     # Show index statistics
apple-mail-mcp rebuild    # Force rebuild index

Real-Time Index Updates

Use --watch to automatically update the index when new emails arrive:

apple-mail-mcp --watch
# or
apple-mail-mcp serve --watch

The file watcher monitors ~/Library/Mail/V10/ for .emlx changes and updates the index in real-time. Requires Full Disk Access.

Configuration

Environment Variables

Claude Code Config

{
  "mcpServers": {
    "mail": {
      "command": "apple-mail-mcp",
      "env": {
        "APPLE_MAIL_DEFAULT_ACCOUNT": "Work"
      }
    }
  }
}

FTS5 Search Index

The FTS5 index makes search() ~100x faster by pre-indexing email content.

How It Works

1. Build from disk: apple-mail-mcp index reads .emlx files directly (~30x faster than JXA)
2. Startup sync: Index is synced with disk when server starts (fast, <5s)
3. Real-time updates: --watch flag enables file watcher for automatic updates
4. Fast search: Queries use SQLite FTS5 with BM25 ranking

Requirements

Building the index requires Full Disk Access for Terminal:

1. Open System Settings
2. Go to Privacy & Security → Full Disk Access
3. Add and enable Terminal.app (or your terminal emulator)
4. Restart terminal

The MCP server itself does NOT need Full Disk Access (uses disk sync).

Performance Comparison

Real-World Benchmarks (22,696 emails)

Architecture

src/apple_mail_mcp/
├── __init__.py         # CLI entry point
├── cli.py              # CLI commands (index, status, rebuild)
├── server.py           # FastMCP server and MCP tools (5 tools)
├── config.py           # Environment variable configuration
├── builders.py         # QueryBuilder for constructing JXA scripts
├── executor.py         # Async JXA script execution utilities
├── index/              # FTS5 search index module
│   ├── __init__.py     # Exports IndexManager
│   ├── schema.py       # SQLite schema, migrations (v3)
│   ├── manager.py      # IndexManager class
│   ├── disk.py         # Direct .emlx file reading + inventory
│   ├── sync.py         # Disk-based state reconciliation
│   ├── search.py       # FTS5 search functions
│   └── watcher.py      # Real-time file watcher
└── jxa/
    ├── __init__.py     # Exports MAIL_CORE_JS
    └── mail_core.js    # Shared JXA utilities library

Design Principles

1. Disk-first sync: Fast filesystem scanning instead of slow JXA queries
2. Consolidated tools: 5 focused tools instead of 13 redundant ones
3. Builder pattern: QueryBuilder constructs optimized JXA scripts
4. Hybrid indexing: Disk reading for speed, state reconciliation for sync
5. Async execution: All JXA calls use asyncio.create_subprocess_exec
6. Type safety: Python type hints and TypedDict for clear API contracts

Hybrid Access Pattern

Performance

Batch Property Fetching (87x faster)

Naive AppleScript/JXA iteration is extremely slow because each property access triggers a separate Apple Event IPC round-trip. We use batch property fetching instead:

// FAST: ~0.6 seconds (87x faster than per-message iteration)
const msgs = inbox.messages;
const senders = msgs.sender();   // Single IPC call returns array
const subjects = msgs.subject(); // Single IPC call returns array

Benchmark Results

Disk-First Sync (12x faster)

Development

uv sync
uv run ruff check src/
uv run ruff format src/
uv run pytest

CI: Ruff lint and format checks run automatically on push/PR to main.

Releases: Tag a version to publish to PyPI automatically:

git tag v0.X.Y && git push origin main v0.X.Y

Security

Implemented Protections

Known Issues

FTS5 search ignores account/mailbox filters

Body search via search() currently searches all indexed emails regardless of account/mailbox parameters. This is because the disk indexer stores account UUIDs from folder paths, while JXA returns friendly names (e.g., "iCloud"). The mismatch prevents filtering.

Impact: Search results may include emails from all accounts, not just the specified one.

Troubleshooting

ModuleNotFoundError after install

If you get ModuleNotFoundError: No module named 'apple_mail_mcp' even thoughthe package is installed, reset the virtual environment:

rm -rf .venv
uv sync --upgrade

Full Disk Access denied

The apple-mail-mcp index command requires Full Disk Access to read Mail.app'sdata files. Grant access in:

System Settings → Privacy & Security → Full Disk Access → Add Terminal

Then restart your terminal.

License

GPL-3.0-or-later