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Home Assistant MCP Server
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Home Assistant MCP Server

An MCP server for Home Assistant that allows querying and controlling smart home devices with natural language, supporting multiple transport methods and secure authentication.
Home automation and IoTArtificial intelligence chatbots#Smart home#Natural language#MCP protocol#Remote control Local.TypeScript
2.5 points
16

What is Home Assistant MCP Server?

This is a server based on the Model Context Protocol (MCP) that allows you to control the Home Assistant smart home system with natural language through an AI assistant (such as Claude). It acts as a bridge between the AI and smart home devices.

How to use Home Assistant MCP Server?

After installing the server, configure your Home Assistant connection information, and then send natural language instructions through a client compatible with the MCP protocol (such as Claude Desktop) to control your smart home devices.

Use cases

It is especially useful when you want to control your smart home using a voice or chat interface, such as natural language instructions like 'Turn on the lights in the living room' or 'What's the indoor temperature today'.

Main features

Natural language controlUse everyday language to query and control smart home devices without memorizing complex commands.
Multiple connection methodsSupports remote connection via HTTP/SSE and local process communication via standard input/output.
Demo modeBuilt-in simulated data function allows testing without a real Home Assistant.
Comprehensive control toolsProvides various functions such as device status query, service call, and history record.

Advantages and limitations

Advantages
No need to learn complex commands; control your smart home with natural language.
Compatible with multiple AI assistants, offering strong scalability.
Provides a secure authentication mechanism to protect your home network.
Supports offline testing and demonstration.
Limitations
Requires a long-lived access token for Home Assistant, posing certain security risks.
Natural language understanding depends on the accuracy of the AI assistant.
Initial configuration requires a certain technical foundation.

How to use

Install the server
Globally install the server program using the bun package manager.
Configure environment variables
Create a.env file and set the Home Assistant connection information.
Start the server
Choose an appropriate startup method according to your usage scenario.
Configure the AI client
Add the server configuration in a client compatible with MCP, such as Claude Desktop.

Usage examples

Query device statusInquire about the current status of sensors in your home.
Control smart lightsAdjust the brightness and color of the lights.
View historical dataObtain the status changes of a device over a period of time.

Frequently asked questions

How to obtain a long-lived access token for Home Assistant?
Which smart home devices does the server support?
How to ensure connection security?
Why isn't my command being executed correctly?

Related resources

Model Context Protocol official website
Learn detailed information about the MCP protocol.
Home Assistant official website
The official website of the smart home platform.
GitHub repository
Project source code and issue tracking.
Installation
Copy the following command to your Client for configuration
Note: Your key is sensitive information, do not share it with anyone.
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