@hachitogo/macos-mcp-tools

MCP servers for macOS: Apple Mail, Contacts, Notes, Memory, Messages, Calendar Events, and Reminders.

The project uses a hybrid approach: JXA/osascript for macOS app automation, and direct read-only SQLite access where it is faster and more reliable. In practice this matters most for Apple Mail reads, where pure osascript approaches tended to time out on non-trivial queries. Calendar Events and Reminders use a compiled Swift binary (EventKitCLI) that interfaces directly with Apple's EventKit framework.

What It Provides

• mail: read/search Apple Mail and perform selected message actions
• contacts: read and update Apple Contacts via JXA
• notes: read and update Apple Notes via JXA
• memory: local SQLite-backed structured memory store
• messages: read/search/send Apple Messages (iMessage and SMS)
• events: read, create, update, and delete Apple Calendar events via EventKit
• reminders: read, create, update, and delete Apple Reminders with lists, subtasks, tags, recurrence, and location triggers via EventKit

Architecture

flowchart LR
  Client["MCP Client\nClaude Desktop / OpenCode"] --> CLI["bunx @hachitogo/macos-mcp-tools <subcommand>"]
  CLI --> Mail["mail server"]
  CLI --> Contacts["contacts server"]
  CLI --> Notes["notes server"]
  CLI --> Memory["memory server"]
  CLI --> Messages["messages server"]
  CLI --> Events["events server"]
  CLI --> Reminders["reminders server"]

  Mail --> MailDB["Apple Mail SQLite\nEnvelope Index"]
  Mail --> JXA["JXA / osascript"]
  Contacts --> JXA
  Notes --> JXA
  Memory --> MemoryDB["SQLite in local data dir"]
  Messages --> MsgDB["Messages SQLite\nchat.db"]
  Messages --> JXA
  Events --> EventKitCLI["EventKitCLI\nSwift binary"]
  Reminders --> EventKitCLI
  EventKitCLI --> EventKit["Apple EventKit\nCalendars + Reminders"]

Requirements

• macOS
• Bun 1.0+
• Optional: pdftotext for PDF attachment text extraction
• Full Disk Access for the terminal app (required by the messages server to read ~/Library/Messages/chat.db)
• Xcode Command Line Tools (required to rebuild the EventKitCLI Swift binary from source; not needed if using the prebuilt binary)

Install Bun with Homebrew:

brew install oven-sh/bun/bun

Optional dependency for PDF extraction:

brew install poppler

Quick Start

1. Verify the CLI locally

bunx @hachitogo/macos-mcp-tools mail

Each subcommand starts one standalone MCP server on stdio:

bunx @hachitogo/macos-mcp-tools mail
bunx @hachitogo/macos-mcp-tools contacts
bunx @hachitogo/macos-mcp-tools notes
bunx @hachitogo/macos-mcp-tools memory
bunx @hachitogo/macos-mcp-tools messages
bunx @hachitogo/macos-mcp-tools events
bunx @hachitogo/macos-mcp-tools reminders

2. Configure Claude Desktop

Add entries like this to your Claude Desktop MCP config:

{
  "mcpServers": {
    "apple_mail": {
      "command": "bunx",
      "args": ["@hachitogo/macos-mcp-tools", "mail"]
    },
    "apple_contacts": {
      "command": "bunx",
      "args": ["@hachitogo/macos-mcp-tools", "contacts"]
    },
    "apple_notes": {
      "command": "bunx",
      "args": ["@hachitogo/macos-mcp-tools", "notes"]
    },
    "memory": {
      "command": "bunx",
      "args": ["@hachitogo/macos-mcp-tools", "memory"]
    },
    "apple_messages": {
      "command": "bunx",
      "args": ["@hachitogo/macos-mcp-tools", "messages"]
    },
    "apple_events": {
      "command": "bunx",
      "args": ["@hachitogo/macos-mcp-tools", "events"]
    },
    "apple_reminders": {
      "command": "bunx",
      "args": ["@hachitogo/macos-mcp-tools", "reminders"]
    }
  }
}

3. Configure OpenCode

Add entries like this to your OpenCode MCP config:

{
  "mcp": {
    "apple_mail": {
      "type": "local",
      "command": ["bunx", "@hachitogo/macos-mcp-tools", "mail"]
    },
    "apple_contacts": {
      "type": "local",
      "command": ["bunx", "@hachitogo/macos-mcp-tools", "contacts"]
    },
    "apple_notes": {
      "type": "local",
      "command": ["bunx", "@hachitogo/macos-mcp-tools", "notes"]
    },
    "memory": {
      "type": "local",
      "command": ["bunx", "@hachitogo/macos-mcp-tools", "memory"]
    },
    "apple_messages": {
      "type": "local",
      "command": ["bunx", "@hachitogo/macos-mcp-tools", "messages"]
    },
    "apple_events": {
      "type": "local",
      "command": ["bunx", "@hachitogo/macos-mcp-tools", "events"]
    },
    "apple_reminders": {
      "type": "local",
      "command": ["bunx", "@hachitogo/macos-mcp-tools", "reminders"]
    }
  }
}

Servers

Mail

Uses a hybrid implementation: direct read-only SQLite queries for fast message reads and searches, plus JXA for actions like fetching bodies, listing attachments, and mutating message state.

Tools: unread_emails, mark_emails_read, fetch_email_body, mark_emails_junk, mark_emails_not_junk, flag_emails, list_email_attachments, fetch_email_attachment, search_emails, extract_email_links, send_email, reply_email, forward_email

Contacts

CRUD for Apple Contacts people and groups via JXA.

Tools: contacts_people, contacts_groups

Notes

Full CRUD for Apple Notes folders and notes, plus search, via JXA.

Tools: list_folders, create_folder, list_notes, get_note, create_note, update_note, move_note, append_to_note, delete_note, delete_folder, search_notes

Memory

Structured memory store with subject-action-object triples, aliases, and duration queries.

Tools: create_entry, update_entry, get_entry, search_entries, query_last_occurrence, query_duration_since

Messages

Hybrid implementation: direct read-only SQLite queries against ~/Library/Messages/chat.db for reading and searching, plus JXA for sending messages. Supports both 1:1 and group chat sending. Inspired by @griches/apple-messages-mcp (MIT).

Tools: list_chats, get_messages, search_messages, get_participants, send_message

Events

Manages Apple Calendar events via a compiled Swift binary using EventKit. Supports full CRUD with structured locations, alarms, recurrence rules, and availability status.

Tools: calendar_events, calendar_calendars

Reminders

Manages Apple Reminders via EventKit. Supports full CRUD with subtasks (stored as checklists in notes), tags (native #tag format), priority levels, location triggers, alarms, and recurrence rules.

Tools: reminders_tasks, reminders_lists, reminders_subtasks

Configuration

Data Directory

memory stores its SQLite database at:

1. MACOS_TOOLS_DATA_DIR if set
2. ~/.local/share/macos-tools/ otherwise

Example:

MACOS_TOOLS_DATA_DIR=/path/to/data bunx @hachitogo/macos-mcp-tools memory

Mail Account Classification

The mail server may create config/email.json locally to classify accounts. This file is treated as generated local state and is ignored by git.

Testing

• Unit tests: bun test

• Type checks: bun run typecheck

• Opt-in integration tests: bun run test:integration

• Opt-in live macOS app smoke tests: bun run test:integration:apps

• Swift binary rebuild: bun run build:swift (requires Xcode Command Line Tools)

Integration tests are isolated and non-destructive. The default opt-in suite uses temporary data directories so it does not touch real memory databases. The live macOS app smoke tests are also read-only, but they do connect to your local Mail, Contacts, Notes, and Messages data and therefore remain separately opt-in.

License

MIT