hass-mcp-server

MCP server for full Home Assistant control. AI agents (GitHub Copilot, Claude, etc.) can manage your dashboards, automations, files, apps, entities, and more — so you never have to touch HA settings yourself.

Features

• Dashboard management — Create, update, delete Lovelace dashboards and deploy full dashboard configs
• File management — Upload, read, list, and delete files on your HA instance via SFTP (e.g. custom cards, images, HTML files)
• Automations, scripts, scenes — Full CRUD for automations, scripts, and scenes
• Input helpers — Create and manage input_boolean, input_number, input_text, input_select, input_datetime, input_button, counter, and timer helpers
• App management — Install, start, stop, restart, uninstall, and configure apps (add-ons)
• Entity & service control — Query states, call services, render templates, browse entity/device/area registries
• System tools — System info, config validation, backups, core restart, error log
• Event & calendar tools — List event types, fire events, calendar queries
• State management — Set, delete entity states; handle intents

66 tools across 5 categories, using three HA transport layers: REST API, WebSocket API, and SSH/SFTP.

Prerequisites

• Home Assistant OS (or any HA installation with Supervisor)
• Long-lived access token — Create one in HA → Profile → Security → Long-Lived Access Tokens
• Node.js 20+
• (Optional) SSH app — Required only for file management tools. Install "Advanced SSH & Web Terminal" from the app store.

Quick Start

No installation needed — your MCP client runs the server automatically via npx. Just add the configuration to your client and you're ready to go.

Configuration

The server is configured through environment variables set in your MCP client's configuration file. The client injects these into the server process at launch time — you never need to set system-wide environment variables.

Required Variables

| Variable | Description | Example | |----------|-------------|---------| | HA_URL | Home Assistant base URL | http://homeassistant.local:8123 | | HA_TOKEN | Long-lived access token | (from HA Profile → Security) |

Optional Variables (for file management)

File management tools require SSH access. See Setting Up SSH below.

| Variable | Description | Example | |----------|-------------|---------| | HA_SSH_HOST | SSH hostname | homeassistant.local | | HA_SSH_PORT | SSH port (default: 22) | 22 | | HA_SSH_USER | SSH username (must be root) | root | | HA_SSH_KEY_PATH | Path to SSH private key | See examples per OS | | HA_SSH_PASSWORD | SSH password (alternative to key) | (your password) |

Getting a Long-Lived Access Token

1. Open your Home Assistant UI
2. Click your profile icon (bottom-left)
3. Scroll to Long-Lived Access Tokens under the Security tab
4. Click Create Token, give it a name, and copy the token

MCP Client Setup

Choose the setup for your MCP client below. In each case, add the configuration and the client will automatically download and run the server via npx.

Tip: You can omit the HA_SSH_* variables if you don't need file management tools. The server will start without SFTP and only fail if you try to use a file tool.

VS Code (GitHub Copilot)

Option A: Install the extension (recommended)

The easiest way — install the Home Assistant MCP Server extension from the VS Code Marketplace. It registers the MCP server automatically and stores your credentials securely.

1. Install the extension from the Marketplace (or search "Home Assistant MCP Server" in the Extensions view).
2. Set your Home Assistant URL in Settings → homeAssistantMcp.url.
3. Run "Home Assistant MCP: Set Access Token" from the Command Palette (Ctrl+Shift+P).
4. The MCP server appears in Copilot Chat automatically.

For file management, configure the SSH settings (homeAssistantMcp.ssh.*) and optionally run "Home Assistant MCP: Set SSH Password".

Option B: One-click install via mcp.json

Click the badge at the top of this README, or use the link below. VS Code will prompt you for your Home Assistant URL and access token.

Option C: Manual mcp.json setup

Create .vscode/mcp.json in your workspace (or add to your User Settings for global access):

{
  "inputs": [
    {
      "type": "promptString",
      "id": "ha-url",
      "description": "Home Assistant base URL (e.g. http://homeassistant.local:8123)"
    },
    {
      "type": "promptString",
      "id": "ha-token",
      "description": "Home Assistant long-lived access token",
      "password": true
    }
  ],
  "servers": {
    "home-assistant": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "@jarahkon/hass-mcp-server@latest"],
      "env": {
        "HA_URL": "${input:ha-url}",
        "HA_TOKEN": "${input:ha-token}"
      }
    }
  }
}

With SSH (for file management tools):

{
  "inputs": [
    {
      "type": "promptString",
      "id": "ha-url",
      "description": "Home Assistant base URL (e.g. http://homeassistant.local:8123)"
    },
    {
      "type": "promptString",
      "id": "ha-token",
      "description": "Home Assistant long-lived access token",
      "password": true
    }
  ],
  "servers": {
    "home-assistant": {
      "type": "stdio",
      "command": "npx",
      "args": ["-y", "@jarahkon/hass-mcp-server@latest"],
      "env": {
        "HA_URL": "${input:ha-url}",
        "HA_TOKEN": "${input:ha-token}",
        "HA_SSH_HOST": "homeassistant.local",
        "HA_SSH_USER": "root",
        "HA_SSH_KEY_PATH": "/home/you/.ssh/ha_ed25519"
      }
    }
  }
}

Claude Desktop

Edit the Claude Desktop config file:

| OS | Config file path | |----|------------------| | Windows | %APPDATA%\Claude\claude_desktop_config.json | | macOS | ~/Library/Application Support/Claude/claude_desktop_config.json | | Linux | ~/.config/Claude/claude_desktop_config.json |

{
  "mcpServers": {
    "home-assistant": {
      "command": "npx",
      "args": ["-y", "@jarahkon/hass-mcp-server@latest"],
      "env": {
        "HA_URL": "http://homeassistant.local:8123",
        "HA_TOKEN": "your_long_lived_access_token_here"
      }
    }
  }
}

Cursor

Edit ~/.cursor/mcp.json:

{
  "mcpServers": {
    "home-assistant": {
      "command": "npx",
      "args": ["-y", "@jarahkon/hass-mcp-server@latest"],
      "env": {
        "HA_URL": "http://homeassistant.local:8123",
        "HA_TOKEN": "your_long_lived_access_token_here"
      }
    }
  }
}

Other MCP Clients

Any MCP client that supports stdio servers will work. Use npx as the command with -y @jarahkon/hass-mcp-server@latest as args, and pass HA_URL and HA_TOKEN in the env block.

Setting Up SSH (for file management)

File management tools (ha_upload_file, ha_read_file, ha_list_files, etc.) require SSH access to your Home Assistant instance.

1. Install the SSH app in Home Assistant

1. In HA, go to Settings → Apps → App Store
2. Install Advanced SSH & Web Terminal
3. In the app configuration, set the username to root (required for SFTP) and enable sftp: true
4. Configure authentication — either set a password or add your public key to authorized_keys (recommended)
5. Start the app and check the logs to confirm it started successfully

2. Generate an SSH key (recommended)

Key-based authentication is more secure than passwords.

# Generate a key pair (leave passphrase empty for automated use)
ssh-keygen -t ed25519 -f ~/.ssh/ha_ed25519 -C "ha-mcp-server"

This creates ~/.ssh/ha_ed25519 (private key) and ~/.ssh/ha_ed25519.pub (public key).

Add the public key contents to the app configuration in HA:

ssh:
  username: root
  password: ""
  authorized_keys:
    - "ssh-ed25519 AAAA...contents of ha_ed25519.pub..."
  sftp: true

3. Add SSH variables to your MCP client config

Add these environment variables alongside HA_URL and HA_TOKEN in the env block of your MCP client configuration:

"HA_SSH_HOST": "homeassistant.local",
"HA_SSH_USER": "root",
"HA_SSH_KEY_PATH": "/home/you/.ssh/ha_ed25519"

Or if using password authentication:

"HA_SSH_HOST": "homeassistant.local",
"HA_SSH_USER": "root",
"HA_SSH_PASSWORD": "your_ssh_password_here"

SSH key path examples

| OS | Example HA_SSH_KEY_PATH | |----|---------------------------| | Windows | C:/Users/you/.ssh/ha_ed25519 | | macOS | /Users/you/.ssh/ha_ed25519 | | Linux | /home/you/.ssh/ha_ed25519 |

Tool Reference

Dashboards (6 tools)

| Tool | Description | |------|-------------| | ha_list_dashboards | List all Lovelace dashboards | | ha_create_dashboard | Create a new dashboard with url_path, title, icon | | ha_update_dashboard | Update dashboard properties (title, icon, sidebar visibility) | | ha_delete_dashboard | Delete a dashboard by ID | | ha_get_dashboard_config | Get the full Lovelace config JSON for a dashboard | | ha_save_dashboard_config | Deploy a complete Lovelace config to a dashboard |

Files (7 tools) — requires SSH

| Tool | Description | |------|-------------| | ha_list_files | List files in a directory on HA (relative to /config/) | | ha_read_file | Read file contents from HA | | ha_upload_file | Upload a local file to HA via SFTP | | ha_upload_file_content | Write string content directly to a file on HA | | ha_delete_file | Delete a file on HA (restricted to safe directories) | | ha_mkdir | Create a directory on HA | | ha_file_exists | Check if a file or directory exists on HA |

Automations, Scripts, Scenes & Helpers (17 tools)

| Tool | Description | |------|-------------| | ha_list_automations | List all automations | | ha_get_automation | Get a specific automation's config by ID | | ha_create_automation | Create a new automation | | ha_update_automation | Update an existing automation | | ha_delete_automation | Delete an automation | | ha_list_scripts | List all scripts | | ha_create_script | Create a new script | | ha_update_script | Update an existing script | | ha_delete_script | Delete a script | | ha_list_scenes | List all scenes | | ha_create_scene | Create a new scene | | ha_update_scene | Update an existing scene | | ha_delete_scene | Delete a scene | | ha_list_helpers | List all input helpers (booleans, numbers, etc.) | | ha_create_helper | Create an input helper of any type | | ha_update_helper | Update an existing helper | | ha_delete_helper | Delete a helper |

Apps & System (18 tools)

| Tool | Description | |------|-------------| | ha_list_addons | List all installed apps with status | | ha_addon_info | Get detailed info about a specific app | | ha_install_addon | Install an app by slug | | ha_start_addon | Start an app | | ha_stop_addon | Stop an app | | ha_restart_addon | Restart an app | | ha_uninstall_addon | Uninstall an app | | ha_addon_options | Get or set app configuration options | | ha_system_info | Get system info (core, OS, supervisor, host) | | ha_check_config | Validate HA configuration before reload | | ha_create_backup | Create a full or partial backup | | ha_list_backups | List all backups | | ha_restart_core | Restart Home Assistant core | | ha_check_api | Check if the HA API is accessible and responding | | ha_get_config | Get HA configuration (location, units, version, components) | | ha_update_core_config | Update core configuration (internal/external URL, location, units) | | ha_get_components | List all loaded HA integrations/components | | ha_get_error_log | Get the Home Assistant error log contents |

Entities & Services (18 tools)

| Tool | Description | |------|-------------| | ha_get_states | Get all entity states (optionally filtered by domain) | | ha_get_entity | Get full state and attributes of a specific entity | | ha_call_service | Call any HA service (turn_on, turn_off, notify, etc.) | | ha_list_services | List available services by domain | | ha_render_template | Render a Jinja2 template | | ha_list_entity_registry | List entities from the entity registry | | ha_list_devices | List all devices | | ha_list_areas | List all areas (rooms) | | ha_create_area | Create a new area | | ha_get_history | Get state history for an entity over a time period | | ha_get_logbook | Get logbook entries (activity log), optionally filtered by entity | | ha_get_events | List all available event types | | ha_fire_event | Fire a custom event to trigger automations | | ha_set_state | Set or create an entity state (virtual sensors, overrides) | | ha_delete_state | Delete an entity state | | ha_get_calendars | List all calendar entities | | ha_get_calendar_events | Get events from a specific calendar | | ha_handle_intent | Handle a conversation/voice intent |

Architecture

The server uses three transport layers to communicate with Home Assistant:

| Layer | Used For | Library | |-------|----------|---------| | REST API (/api/...) | Service calls, states, history, templates, Supervisor proxy, automation/script/scene CRUD | Built-in fetch | | WebSocket API (/api/websocket) | Dashboard CRUD, helper CRUD, entity registry | ws | | SSH/SFTP | File upload/download/list/delete on HA filesystem | ssh2-sftp-client |

src/
├── index.ts              # MCP server entry point, registers all tools
├── config.ts             # Environment variable parsing and validation
├── ha/
│   ├── rest-client.ts    # REST API client with auth header
│   ├── ws-client.ts      # WebSocket client with auto-reconnect
│   └── sftp-client.ts    # SFTP client with path safety checks
└── tools/
    ├── dashboards.ts     # 6 dashboard tools
    ├── files.ts          # 7 file management tools
    ├── automations.ts    # 17 automation/script/scene/helper tools
    ├── addons.ts         # 18 app and system tools
    └── entities.ts       # 18 entity and service tools

vscode-extension/         # VS Code Marketplace extension wrapper
└── src/
    └── extension.ts      # Registers MCP server via mcpServerDefinitionProviders API

Security Notes

• SFTP path restrictions: Read operations are allowed anywhere under /config/. Write and delete operations are restricted to safe subdirectories (www/, custom_components/, themes/, blueprints/, scripts/, automations/) and specific files (configuration.yaml, automations.yaml, scripts.yaml, scenes.yaml). Write operations to system directories like deps/ or .storage/ are blocked.
• Token security: Never commit your .env file. The .gitignore already excludes it.
• SSH authentication: Prefer SSH key-based auth (HA_SSH_KEY_PATH) over passwords. Never commit private keys or passwords to source control.

License

MIT