Airmail MCP

MCP server for Airmail — manage emails, calendars, contacts, and more from AI assistants.

This is a lightweight bridge that connects AI clients to Airmail's built-in MCP server. The bridge connects locally to Airmail on your Mac. Data retrieved by AI tools is processed by your chosen AI provider.

Requirements

• macOS 13+
• Airmail installed with MCP enabled (Preferences → MCP)
• Node.js 18+

Installation

Published npm package

npx installs and runs the published package automatically. Users do not need to clone this repository or run npm install.

codex mcp remove airmail
codex mcp add airmail -- npx -y airmail-mcp

Use this for normal installs after the desired version has been published to npm.

Local development build

Use this when testing changes from a local checkout before publishing a new npm version.

git clone https://github.com/Airmail/airmail-mcp.git
cd airmail-mcp
npm install
npm run build

Then point your MCP client at the compiled local bridge. Do not commit a machine-specific path in shared docs or config examples; use your own checkout path.

Codex CLI / Codex Desktop:

codex mcp remove airmail
codex mcp add airmail -- node "$(pwd)/dist/index.js"

Claude Desktop JSON only:

{
  "mcpServers": {
    "airmail": {
      "command": "node",
      "args": ["/absolute/path/to/airmail-mcp/dist/index.js"]
    }
  }
}

You can also smoke-test the local stdio bridge without installing it into a client:

printf '%s\n' \
'{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-11-05","capabilities":{},"clientInfo":{"name":"Airmail MCP Local Test","version":"1.0"}}}' \
'{"jsonrpc":"2.0","method":"notifications/initialized"}' \
'{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"list_inbox","arguments":{"limit":3}}}' \
| node dist/index.js

Restart the MCP client after changing its config. On first connection, Airmail shows an authorization prompt; click Allow.

Important: npx -y airmail-mcp installs the published npm package, not this local checkout. Use the local node "$(pwd)/dist/index.js" command until the package is published.

GitHub development install

Use this when you want the MCP client to install from GitHub instead of a local checkout. This tests pushed GitHub code, not uncommitted local edits.

codex mcp remove airmail
codex mcp add airmail -- npx -y github:Airmail/airmail-mcp#main

Replace main with a branch name, tag, or commit SHA when testing a specific version:

codex mcp add airmail -- npx -y github:Airmail/airmail-mcp#branch-name

Claude Desktop (MCPB extension)

Install from the Claude MCP Directory or download the latest .mcpb file from Releases and double-click to install.

Claude Desktop (manual)

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "airmail": {
      "command": "npx",
      "args": ["-y", "airmail-mcp"]
    }
  }
}

On first use, Airmail shows a pairing prompt and issues a per-client token for this bridge. By default that token stays only in bridge memory for the current session.

Claude Code

claude mcp remove airmail && claude mcp add --transport stdio airmail -- npx -y airmail-mcp

Gemini CLI

gemini mcp remove airmail && gemini mcp add airmail npx -- -y airmail-mcp

Codex CLI

codex mcp remove airmail && codex mcp add airmail -- npx -y airmail-mcp

Cursor

Add to .cursor/mcp.json in your project (or global settings):

{
  "mcpServers": {
    "airmail": {
      "command": "npx",
      "args": ["-y", "airmail-mcp"]
    }
  }
}

Windsurf

Add to ~/.codeium/windsurf/mcp_config.json:

{
  "mcpServers": {
    "airmail": {
      "command": "npx",
      "args": ["-y", "airmail-mcp"]
    }
  }
}

VS Code (GitHub Copilot)

Add to .vscode/mcp.json in your project:

{
  "servers": {
    "airmail": {
      "command": "npx",
      "args": ["-y", "airmail-mcp"]
    }
  }
}

Authentication

On first use, the bridge asks Airmail to pair this MCP client. Airmail shows an authorization prompt, then returns a per-client token. By default, the bridge keeps that token only in memory for the current process.

Airmail MCP does not use a global auth token. Access is pairing-only and can be revoked per client in Airmail's MCP Permissions tab.

Tools (101)

Email (core)

list_accounts · list_folders · list_messages · get_message · list_inbox · list_starred · list_sent · list_trash · list_spam · search_messages · fetch_message_body · list_attachments · get_attachment · get_unread_counts · search_contacts · get_draft · delete_draft · get_message_thread · list_windows · export_eml

Actions

mark_messages · archive_messages · trash_messages · move_messages · copy_messages · snooze_messages · add_to_list · delete_messages · empty_folder · refresh_inbox · enable_disable_account · share_icloud

Compose

compose_email · reply_to_message · forward_message · quick_reply · send_email · save_as_draft · list_drafts

Folders

create_folder · rename_folder · delete_folder

Semantic Search

semantic_search · semantic_index_status

Profile & Triage

analyze_email_history · batch_triage_inbox · get_user_profile · update_user_profile · suggest_folder · get_behavior_stats

Calendar & Reminders

list_calendars · list_events · get_event · create_event · update_event · delete_event · list_reminders · create_reminder · complete_reminder · delete_reminder

Contacts

list_contacts_book · get_contact · search_contacts_book · create_contact · update_contact · delete_contact · list_contact_groups

VIP & Blocked Lists

list_vips · add_vip · remove_vip · list_blocked · add_blocked · remove_blocked

Rules

list_rules · get_rule · create_rule · delete_rule · toggle_rule

Signatures

list_signatures · create_signature · update_signature · delete_signature

Smart Folders

list_smart_folders · create_smart_folder · update_smart_folder · delete_smart_folder

Account Settings

get_account_settings · update_account_settings · get_vacation_settings · set_vacation_settings

Aliases

list_aliases · create_alias · update_alias · delete_alias

Preferences

get_preferences · set_preferences

Meta

manage_capabilities — enable/disable tool groups to reduce context usage

Tool groups

Tools are organized into capability groups that can be enabled or disabled at runtime via manage_capabilities. This reduces context usage by hiding tools you don't need.

Group	Tools	Default
mail	read, action, compose	Always on
profile	user profile & behavior	On
folders	folder create/rename/delete	On
semantic	semantic search & index	On
calendar	calendar & reminder	On
contacts	address book	On
preferences	app preferences read/write	On
rules	email rules CRUD	On
lists	VIP & blocked sender lists	On
smartfolders	smart folder CRUD	On
signatures	email signature CRUD	On
aliases	email alias CRUD	On
accountsettings	per-account settings & vacation	On
To enable all groups, ask the AI to call manage_capabilities with enable: ["preferences", "rules", "lists", "smartfolders", "signatures", "aliases", "accountsettings"].

Deep links

MCP tool responses include airmailmcp:// deep links that open Airmail directly to the relevant content.

Command	URL	Description
message	airmailmcp://message?mail=...&messageid=...	Select message in main window
open	airmailmcp://open?mail=...&messageid=...	Open message in reader window
compose	airmailmcp://compose?to=...&subject=...	Open composer with pre-filled content
reply	airmailmcp://reply?mail=...&messageid=...	Reply to a message
draft	airmailmcp://draft?mail=...&messageid=...	Open draft in composer
archive	airmailmcp://archive?mail=...&messageid=...	Archive a message
delete	airmailmcp://delete?mail=...&messageid=...	Move message to trash
view	airmailmcp://view?mail=...&folder=...	Navigate to account/folder
attachment	airmailmcp://attachment?mail=...&messageid=...&index=0	Open an attachment
settings	airmailmcp://settings?pref=mcp_server	Open Preferences pane

How it works

AI Client ←stdio→ airmail-mcp (Node.js) ←HTTP→ Airmail.app (localhost:9876)

This package is a thin transport bridge. All tool logic runs inside Airmail's native Swift MCP server. The bridge:

1. Reads JSON-RPC messages from stdin
2. Forwards them via HTTP POST to Airmail's local MCP server
3. Writes responses back to stdout

If Airmail is not running, the bridge exits with a clear error by default. Set AIRMAIL_MCP_AUTO_LAUNCH=1 if you want the bridge to open Airmail automatically.

Environment variables

Variable	Description	Default
AIRMAIL_MCP_REMEMBER_CLIENT_TOKEN	Set to 1 to persist the bridge's per-client token in Keychain service com.airmail.mcp.client.	—
AIRMAIL_MCP_PORT	MCP server port	9876
AIRMAIL_MCP_AUTO_LAUNCH	Set to 1/true to launch Airmail when the local MCP server is not reachable	0

Development

git clone https://github.com/Airmail/airmail-mcp.git
cd airmail-mcp
npm install
npm run build

Sync tools from Airmail source

npm run sync-tools          # reads Swift source, updates manifest.json

Build .mcpb extension

npx @anthropic-ai/mcpb pack .

License

MIT