Hammerspoon

macOS automation via Hammerspoon — 75 tools for windows, Spaces, audio, Bluetooth, and more

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Not yet automatically verified

We haven't yet run this listing's install command through our automated sandbox check. This isn't a red flag — we're steadily working through the catalog.

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

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

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Documentation Overview

hammerspoon-mcp

Give AI agents deep control over macOS — windows, audio, Bluetooth, Spaces, Focus mode, and 200+ OS APIs — through one MCP server.

What is this?

An MCP server that bridges AI agents to Hammerspoon — the most powerful macOS automation tool available. Unlike screenshot-and-click tools, this gives agents programmatic OS-level access: manage windows by ID, switch audio devices by name, move apps between Spaces, toggle Focus mode, and subscribe to real-time OS events.

75 tools. 12 subscribable resources. Zero native dependencies.

Quick Start

bash

# 1. Install Hammerspoon (if you haven't)
brew install --cask hammerspoon

# 2. Enable the IPC module (one-time setup)
#    Add this line to ~/.hammerspoon/init.lua:
#    require("hs.ipc")
#    Then reload your Hammerspoon config (Cmd+Alt+Ctrl+R or restart the app)

# 3. (Optional) Install the hs CLI symlink for convenience:
#    Run in Hammerspoon console: hs.ipc.cliInstall()
#    Or manually: ln -sf /Applications/Hammerspoon.app/Contents/Frameworks/hs/hs ~/.local/bin/hs

# 4. Run the MCP server
npx hammerspoon-mcp

Note: The server auto-discovers the hs binary — it checks ~/.local/bin/hs, /usr/local/bin/hs, /opt/homebrew/bin/hs, and the app bundle path. You don't need hs on your PATH if Hammerspoon is installed to /Applications.

Architecture

Code

┌─────────────────────────────────────────────────────────┐
│  MCP Client (Claude, Cursor, MeshClaw, etc.)            │
└──────────────────────────┬──────────────────────────────┘
                           │ stdio (JSON-RPC)
┌──────────────────────────▼──────────────────────────────┐
│  hammerspoon-mcp (Node.js)                              │
│  ├─ tools → execSync("hs -c '...'")  (request/response)│
│  └─ watchers → named pipe reader     (push events)     │
└──────────────────────────┬──────────────────────────────┘
                           │ hs CLI / named pipe
┌──────────────────────────▼──────────────────────────────┐
│  Hammerspoon.app (Lua runtime + ObjC bridge)            │
│  200+ modules: window, screen, spaces, audio, wifi,     │
│  bluetooth, battery, USB, filesystem, accessibility...  │
└──────────────────────────┬──────────────────────────────┘
                           │
              macOS APIs (CoreGraphics, IOKit, etc.)

MCP Client Configuration

Claude Desktop

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

config.json

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

Claude Code

Terminal

claude mcp add hammerspoon -- npx hammerspoon-mcp

Cursor / VS Code / Copilot

Add to .vscode/mcp.json:

config.json

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

Kiro

Add to ~/.aws/amazonq/mcp.json:

config.json

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

Tools

🪟 Window Management (7)

Tool	Description
`hs_list_windows`	All visible windows with app, title, frame, id
`hs_focus_window`	Bring window to front by id or title match
`hs_move_window`	Move/resize window by id
`hs_window_layout`	16 presets (halves, thirds, quarters, grid, cascade, center…) + custom fractional layouts
`hs_save_layout`	Snapshot all window positions as a named layout
`hs_restore_layout`	Restore a saved layout (matches by app + title)
`hs_list_layouts`	List saved layout names

🖥️ Spaces / Virtual Desktops (9)

Tool	Description
`hs_spaces_list`	All spaces per screen with active markers
`hs_spaces_active`	Currently focused space + screen
`hs_spaces_goto`	Switch by ID or index
`hs_spaces_move_window`	Move window to another space (optionally follow)
`hs_spaces_add`	Create a new space
`hs_spaces_remove`	Remove a space (safety checks)
`hs_spaces_windows`	Windows on a specific space
`hs_spaces_window_spaces`	Which space(s) a window is on
`hs_spaces_mission_control`	Toggle Mission Control / Exposé / Launchpad / Show Desktop

📱 Application Control (3)

Tool	Description
`hs_list_apps`	Running applications with bundle ID, PID, hidden state
`hs_launch_app`	Launch or activate an app by name
`hs_kill_app`	Quit an app

⌨️ Input (3)

Tool	Description
`hs_click`	Click at coordinates with button + modifier options
`hs_type`	Type text (Unicode, CJK, emoji)
`hs_hotkey`	Press key combo (e.g. `"cmd+shift+4"`)

🖼️ Screen (3)

Tool	Description
`hs_screenshot`	Capture full screen or region (base64 PNG)
`hs_screens`	Display info (resolution, name, rotation)
`hs_mouse_position`	Current cursor coordinates

🔊 Audio Devices (6)

Tool	Description
`hs_audio_devices`	List all input/output with volume, mute, transport type
`hs_audio_default`	Get/set default devices (fuzzy name match)
`hs_audio_volume`	Volume on any specific device (0–100)
`hs_audio_mute`	Mute/unmute/toggle any device
`hs_audio_datasources`	List/switch data sources (speakers vs headphones)
`hs_audio_watch`	Watch for device changes

🔵 Bluetooth (5)

Tool	Description
`hs_bluetooth_status`	Power state and discoverability
`hs_bluetooth_power`	On / off / toggle
`hs_bluetooth_devices`	List paired or connected devices
`hs_bluetooth_connect`	Connect by name (fuzzy) or MAC address
`hs_bluetooth_disconnect`	Disconnect a device

Requires blueutil: brew install blueutil

🌙 Focus / Do Not Disturb (6)

Tool	Description
`hs_focus_status`	Check if DND/Focus is active + profile name
`hs_focus_toggle`	Toggle via Control Center (no setup needed)
`hs_focus_shortcut`	Enable/disable via macOS Shortcuts (most reliable)
`hs_focus_install_shortcut`	One-time setup guide
`hs_focus_schedule`	DND for N minutes with auto-disable
`hs_focus_cancel_timer`	Cancel scheduled disable

🔋 System State (6)

Tool	Description
`hs_battery`	Charge %, power source, time remaining
`hs_wifi`	Current SSID and interface details
`hs_volume`	System volume get/set
`hs_dark_mode`	Get/toggle dark mode
`hs_notify`	Post a macOS notification
`hs_clipboard`	Read/write system pasteboard

🔆 Display (1)

Tool	Description
`hs_brightness`	Get/set screen brightness (0–100)

⏱️ Timers (3)

Tool	Description
`hs_timer_start`	Named countdown with notification on fire
`hs_timer_cancel`	Cancel by name
`hs_timer_list`	List active timers

📁 Finder / Files (4)

Tool	Description
`hs_finder_selection`	Get currently selected Finder items
`hs_finder_open`	Open/reveal path in Finder
`hs_trash`	Move to Trash (reversible)
`hs_quicklook`	Quick Look preview

🛠️ Utilities (5)

Tool	Description
`hs_system_info`	CPU, memory, thermal state, uptime
`hs_caffeinate`	Prevent sleep for N minutes
`hs_execute`	Run shell command (user environment)
`hs_open_url`	Open URL in browser or specific app
`hs_alert`	HUD-style on-screen overlay message

👁️ Watchers — Live OS Event Streams (13)

Tool	Events
`hs_watch_apps`	App activated, launched, terminated, hidden
`hs_watch_wifi`	Network changes
`hs_watch_usb`	Device connect/disconnect
`hs_watch_battery`	Charge level, power source
`hs_watch_screens`	Display configuration
`hs_watch_paths`	Filesystem changes
`hs_watch_sleep`	Sleep/wake/lock/unlock
`hs_watch_clipboard`	Every pasteboard change
`hs_watch_clipboard_history`	Ring buffer with source app tracking
`hs_get_clipboard_history`	Read the full buffer
`hs_watch_urls`	Incoming `hammerspoon://mcp/...` URLs
`hs_unwatch`	Stop a watcher
`hs_list_watchers`	List active watchers

🧪 Escape Hatch (1)

Tool	Description
`hs_eval`	Execute arbitrary Lua in the Hammerspoon runtime

This gives access to all 200+ Hammerspoon modules not covered by dedicated tools — USB details, serial ports, network interfaces, Canvas drawing, menubar items, etc.

Resources (Subscriptions)

MCP clients can subscribe to resource URIs and receive push notifications when OS events fire:

Read the full README →View source on GitHub →

Related MCP Servers

View all in Developer Tools View all alternatives

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about Hammerspoon

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "hammerspoon": { "command": "npx", "args": ["-y", "hammerspoon"] } }

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Markdown (GitHub README)

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<a href="https://allmcps.com/mcp/hammerspoon"><img src="https://allmcps.com/api/badge/hammerspoon?style=directory" alt="Hammerspoon on AllMCPs" /></a>

Technical Specs & Signals

CategoryDeveloper Tools

36Quality signal: Fair · 36/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20

Documentation & tools16/30

Adoption & activity1/15

Community engagement0/10

A guidance signal from public completeness & health data — not a user rating. New listings start lower and rise as they add docs, get verified, and grow adoption. Signals we can't observe for a listing are skipped, not counted against it.

★ Featured

Moxie Docs MCP

MCP & Agent Skills for Automated Documentation, and codebase conventions + context

Explore Server →

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This directory is pre-filled from public sources. Claim via GitHub README, site badge, or DNS TXT to unlock edit access and the Official badge — proof is checked automatically, then reviewed by our team.

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More in 💻 Developer Tools →Best MCP servers for Developers →Alternatives to Hammerspoon →Install in Claude Desktop Install in Cursor Install in VS Code

Hammerspoon

macOS automation via Hammerspoon — 75 tools for windows, Spaces, audio, Bluetooth, and more

Quick Install

Automated & IDE Setup

Copy the AI prompt to install this server into Claude Code, Cursor, or another agent — or use 1-click editor setup below.

Add to Cursor Add to VS Code

Not yet automatically verified

We haven't yet run this listing's install command through our automated sandbox check. This isn't a red flag — we're steadily working through the catalog.

Manual Client & Custom JSON ConfigExpand JSON ▾

Client Config & Setup

Choose your client or environment

Target File:~/Library/Application Support/Claude/claude_desktop_config.json

claude_desktop_config.json

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

💡 Paste the JSON block into your client's configuration file under mcpServers, then restart the application.

Documentation Overview

hammerspoon-mcp

Give AI agents deep control over macOS — windows, audio, Bluetooth, Spaces, Focus mode, and 200+ OS APIs — through one MCP server.

What is this?

75 tools. 12 subscribable resources. Zero native dependencies.

Quick Start

bash

# 1. Install Hammerspoon (if you haven't)
brew install --cask hammerspoon

# 2. Enable the IPC module (one-time setup)
#    Add this line to ~/.hammerspoon/init.lua:
#    require("hs.ipc")
#    Then reload your Hammerspoon config (Cmd+Alt+Ctrl+R or restart the app)

# 3. (Optional) Install the hs CLI symlink for convenience:
#    Run in Hammerspoon console: hs.ipc.cliInstall()
#    Or manually: ln -sf /Applications/Hammerspoon.app/Contents/Frameworks/hs/hs ~/.local/bin/hs

# 4. Run the MCP server
npx hammerspoon-mcp

Note: The server auto-discovers the hs binary — it checks ~/.local/bin/hs, /usr/local/bin/hs, /opt/homebrew/bin/hs, and the app bundle path. You don't need hs on your PATH if Hammerspoon is installed to /Applications.

Architecture

Code

┌─────────────────────────────────────────────────────────┐
│  MCP Client (Claude, Cursor, MeshClaw, etc.)            │
└──────────────────────────┬──────────────────────────────┘
                           │ stdio (JSON-RPC)
┌──────────────────────────▼──────────────────────────────┐
│  hammerspoon-mcp (Node.js)                              │
│  ├─ tools → execSync("hs -c '...'")  (request/response)│
│  └─ watchers → named pipe reader     (push events)     │
└──────────────────────────┬──────────────────────────────┘
                           │ hs CLI / named pipe
┌──────────────────────────▼──────────────────────────────┐
│  Hammerspoon.app (Lua runtime + ObjC bridge)            │
│  200+ modules: window, screen, spaces, audio, wifi,     │
│  bluetooth, battery, USB, filesystem, accessibility...  │
└──────────────────────────┬──────────────────────────────┘
                           │
              macOS APIs (CoreGraphics, IOKit, etc.)

MCP Client Configuration

Claude Desktop

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

config.json

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

Claude Code

Terminal

claude mcp add hammerspoon -- npx hammerspoon-mcp

Cursor / VS Code / Copilot

Add to .vscode/mcp.json:

config.json

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

Kiro

Add to ~/.aws/amazonq/mcp.json:

config.json

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

Tools

🪟 Window Management (7)

Tool	Description
`hs_list_windows`	All visible windows with app, title, frame, id
`hs_focus_window`	Bring window to front by id or title match
`hs_move_window`	Move/resize window by id
`hs_window_layout`	16 presets (halves, thirds, quarters, grid, cascade, center…) + custom fractional layouts
`hs_save_layout`	Snapshot all window positions as a named layout
`hs_restore_layout`	Restore a saved layout (matches by app + title)
`hs_list_layouts`	List saved layout names

🖥️ Spaces / Virtual Desktops (9)

Tool	Description
`hs_spaces_list`	All spaces per screen with active markers
`hs_spaces_active`	Currently focused space + screen
`hs_spaces_goto`	Switch by ID or index
`hs_spaces_move_window`	Move window to another space (optionally follow)
`hs_spaces_add`	Create a new space
`hs_spaces_remove`	Remove a space (safety checks)
`hs_spaces_windows`	Windows on a specific space
`hs_spaces_window_spaces`	Which space(s) a window is on
`hs_spaces_mission_control`	Toggle Mission Control / Exposé / Launchpad / Show Desktop

📱 Application Control (3)

Tool	Description
`hs_list_apps`	Running applications with bundle ID, PID, hidden state
`hs_launch_app`	Launch or activate an app by name
`hs_kill_app`	Quit an app

⌨️ Input (3)

Tool	Description
`hs_click`	Click at coordinates with button + modifier options
`hs_type`	Type text (Unicode, CJK, emoji)
`hs_hotkey`	Press key combo (e.g. `"cmd+shift+4"`)

🖼️ Screen (3)

Tool	Description
`hs_screenshot`	Capture full screen or region (base64 PNG)
`hs_screens`	Display info (resolution, name, rotation)
`hs_mouse_position`	Current cursor coordinates

🔊 Audio Devices (6)

Tool	Description
`hs_audio_devices`	List all input/output with volume, mute, transport type
`hs_audio_default`	Get/set default devices (fuzzy name match)
`hs_audio_volume`	Volume on any specific device (0–100)
`hs_audio_mute`	Mute/unmute/toggle any device
`hs_audio_datasources`	List/switch data sources (speakers vs headphones)
`hs_audio_watch`	Watch for device changes

🔵 Bluetooth (5)

Tool	Description
`hs_bluetooth_status`	Power state and discoverability
`hs_bluetooth_power`	On / off / toggle
`hs_bluetooth_devices`	List paired or connected devices
`hs_bluetooth_connect`	Connect by name (fuzzy) or MAC address
`hs_bluetooth_disconnect`	Disconnect a device

Requires blueutil: brew install blueutil

🌙 Focus / Do Not Disturb (6)

Tool	Description
`hs_focus_status`	Check if DND/Focus is active + profile name
`hs_focus_toggle`	Toggle via Control Center (no setup needed)
`hs_focus_shortcut`	Enable/disable via macOS Shortcuts (most reliable)
`hs_focus_install_shortcut`	One-time setup guide
`hs_focus_schedule`	DND for N minutes with auto-disable
`hs_focus_cancel_timer`	Cancel scheduled disable

🔋 System State (6)

Tool	Description
`hs_battery`	Charge %, power source, time remaining
`hs_wifi`	Current SSID and interface details
`hs_volume`	System volume get/set
`hs_dark_mode`	Get/toggle dark mode
`hs_notify`	Post a macOS notification
`hs_clipboard`	Read/write system pasteboard

🔆 Display (1)

Tool	Description
`hs_brightness`	Get/set screen brightness (0–100)

⏱️ Timers (3)

Tool	Description
`hs_timer_start`	Named countdown with notification on fire
`hs_timer_cancel`	Cancel by name
`hs_timer_list`	List active timers

📁 Finder / Files (4)

Tool	Description
`hs_finder_selection`	Get currently selected Finder items
`hs_finder_open`	Open/reveal path in Finder
`hs_trash`	Move to Trash (reversible)
`hs_quicklook`	Quick Look preview

🛠️ Utilities (5)

Tool	Description
`hs_system_info`	CPU, memory, thermal state, uptime
`hs_caffeinate`	Prevent sleep for N minutes
`hs_execute`	Run shell command (user environment)
`hs_open_url`	Open URL in browser or specific app
`hs_alert`	HUD-style on-screen overlay message

👁️ Watchers — Live OS Event Streams (13)

Tool	Events
`hs_watch_apps`	App activated, launched, terminated, hidden
`hs_watch_wifi`	Network changes
`hs_watch_usb`	Device connect/disconnect
`hs_watch_battery`	Charge level, power source
`hs_watch_screens`	Display configuration
`hs_watch_paths`	Filesystem changes
`hs_watch_sleep`	Sleep/wake/lock/unlock
`hs_watch_clipboard`	Every pasteboard change
`hs_watch_clipboard_history`	Ring buffer with source app tracking
`hs_get_clipboard_history`	Read the full buffer
`hs_watch_urls`	Incoming `hammerspoon://mcp/...` URLs
`hs_unwatch`	Stop a watcher
`hs_list_watchers`	List active watchers

🧪 Escape Hatch (1)

Tool	Description
`hs_eval`	Execute arbitrary Lua in the Hammerspoon runtime

This gives access to all 200+ Hammerspoon modules not covered by dedicated tools — USB details, serial ports, network interfaces, Canvas drawing, menubar items, etc.

Resources (Subscriptions)

MCP clients can subscribe to resource URIs and receive push notifications when OS events fire:

Read the full README →View source on GitHub →

Related MCP Servers

View all in Developer Tools View all alternatives

Reviews

No reviews yet — be the first to share how this listing worked for you.

Frequently Asked Questions about Hammerspoon

Add the following block to your claude_desktop_config.json under mcpServers: "mcpServers": { "hammerspoon": { "command": "npx", "args": ["-y", "hammerspoon"] } }

AllMCPs Directory Badge

Full Badge Customizer

Showcase your server listing on GitHub or your project documentation. Embed this dynamic SVG badge to highlight official listing status and live engagement.

Badge Style:

Live Dynamic SVG Preview

Markdown (GitHub README)

[![AllMCPs](https://allmcps.com/api/badge/hammerspoon?style=directory)](https://allmcps.com/mcp/hammerspoon)

HTML Embed

<a href="https://allmcps.com/mcp/hammerspoon"><img src="https://allmcps.com/api/badge/hammerspoon?style=directory" alt="Hammerspoon on AllMCPs" /></a>

Technical Specs & Signals

CategoryDeveloper Tools

36Quality signal: Fair · 36/100How this signal is calculated ▾

Server availabilityNot measured

Not scored for repo-hosted servers — we can't reach the running server, only its GitHub page. Hosted MCP endpoints are health-checked live.

Verified ownership10/20

Documentation & tools16/30

Adoption & activity1/15

Community engagement0/10

★ Featured

Moxie Docs MCP

MCP & Agent Skills for Automated Documentation, and codebase conventions + context

Explore Server →

Own this project?

Free dofollow backlink: add your website and place the AllMCPs badge on it — no claim needed. We detect it automatically and keep it verified as long as the badge stays live.

Claim & get free dofollow

Share & Embed

Add our SVG badge (dark/light directory styles) or embeddable widget to your site.

Explore more

More in 💻 Developer Tools →Best MCP servers for Developers →Alternatives to Hammerspoon →Install in Claude Desktop Install in Cursor Install in VS Code