# Bacnet Mcp

> A Model Context Protocol (MCP) server for BACnet.

- **Type:** MCP server
- **Install:** `agentstack add mcp-ezhuk-bacnet-mcp`
- **Verified:** Yes — security-reviewed for prompt injection and unsafe behavior
- **Seller:** [ezhuk](https://agentstack.voostack.com/s/ezhuk)
- **Installs:** 0
- **Category:** [Integrations](https://agentstack.voostack.com/c/integrations)
- **Latest version:** 0.1.0
- **License:** MIT
- **Upstream author:** [ezhuk](https://github.com/ezhuk)
- **Source:** https://github.com/ezhuk/bacnet-mcp

## Install

```sh
agentstack add mcp-ezhuk-bacnet-mcp
```

Requires the [AgentStack CLI](https://agentstack.voostack.com/docs/cli). Works with Claude Code, Cursor, and any MCP-compatible agent.

## About

## BACnet MCP Server

[](https://github.com/ezhuk/bacnet-mcp/actions/workflows/test.yml)
[](https://codecov.io/github/ezhuk/bacnet-mcp)
[](https://pypi.org/p/bacnet-mcp)

A lightweight [Model Context Protocol (MCP)](https://modelcontextprotocol.io) server that connects LLM agents to [BACnet](https://en.wikipedia.org/wiki/BACnet) devices in a secure, standardized way, enabling seamless integration of AI-driven workflows with Building Automation (BAS), Building Management (BMS) and Industrial Control (ICS) systems, allowing agents to monitor real-time sensor data, actuate devices, and orchestrate complex automation tasks.

## Getting Started

Use [uv](https://github.com/astral-sh/uv) to add and manage the BACnet MCP server as a dependency in your project, or install it directly via `uv pip install` or `pip install`. See the [Installation](https://github.com/ezhuk/bacnet-mcp/blob/main/docs/bacnet-mcp/installation.mdx) section of the documentation for full installation instructions and more details.

```bash
uv add bacnet-mcp
```

The server can be embedded in and run directly from your application. By default, it exposes a `Streamable HTTP` endpoint at `http://127.0.0.1:8000/mcp/`.

```python
# app.py
from bacnet_mcp import BACnetMCP

mcp = BACnetMCP()

if __name__ == "__main__":
    mcp.run(transport="http")
```

It can also be launched from the command line using the provided `CLI` without modifying the source code.

```bash
bacnet-mcp
```

Or in an ephemeral, isolated environment using `uvx`. Check out the [Using tools](https://docs.astral.sh/uv/guides/tools/) guide for more details.

```bash
uvx bacnet-mcp
```

### Configuration

For the use cases where most operations target a specific device, such as a Programmable Logic Controller (PLC) or BACnet gateway, its connection settings (`host` and `port`) can be specified at runtime using environment variables so that all prompts that omit explicit connection parameters will be routed to this device.

```bash
export BACNET_MCP_BACNET__HOST=10.0.0.1
export BACNET_MCP_BACNET__PORT=47808
```

These settings can also be specified in a `.env` file in the working directory.

```text
# .env
bacnet_mcp_bacnet__host=10.0.0.1
bacnet_mcp_bacnet__port=47808
```

When interacting with multiple devices, each device’s connection parameters (`host`, `port`) can be defined with a unique `name` in a `devices.json` file in the working directory. Prompts can then refer to devices by `name`.

```json
{
  "devices": [
    {"name": "Boiler", "host": "10.0.0.3", "port": 47808},
    {"name": "Valve", "host": "10.0.0.4", "port": 47808}
  ]
}
```

### MCP Inspector

To confirm the server is up and running and explore available resources and tools, run the [MCP Inspector](https://modelcontextprotocol.io/docs/tools/inspector) and connect it to the BACnet MCP server at `http://127.0.0.1:8000/mcp/`. Make sure to set the transport to `Streamable HTTP`.

```bash
npx @modelcontextprotocol/inspector
```

## Core Concepts

The BACnet MCP server leverages FastMCP 2.0's core building blocks - resource templates, tools, and prompts - to streamline BACnet read and write operations with minimal boilerplate and a clean, Pythonic interface.

### Read Properties

Each object on a device is mapped to a resource (and exposed as a tool) and [resource templates](https://gofastmcp.com/servers/resources#resource-templates) are used to specify connection details (host, port) and read parameters (instance, property).

```python
@mcp.resource("udp://{host}:{port}/{obj}/{instance}/{prop}")
@mcp.tool(
    annotations={
        "title": "Read Property",
        "readOnlyHint": True,
        "openWorldHint": True,
    }
)
async def read_property(
    host: str = settings.bacnet.host,
    port: int = settings.bacnet.port,
    obj: str = "analogValue",
    instance: str = "1",
    prop: str = "presentValue",
) -> str:
    """Reads the content of a BACnet object property on a remote unit."""
    ...
```

### Write Properties

Write operations are exposed as a [tool](https://gofastmcp.com/servers/tools), accepting the same connection details (host, port) and allowing to set the content of an object property in a single, atomic call.

```python
@mcp.tool(
    annotations={
        "title": "Write Property",
        "readOnlyHint": False,
        "openWorldHint": True,
    }
)
async def write_property(
    host: str = settings.bacnet.host,
    port: int = settings.bacnet.port,
    obj: str = "analogValue,1",
    prop: str = "presentValue",
    data: str = "1.0",
) -> str:
    """Writes a BACnet object property on a remote device."""
    ...
```

### Authentication

To enable authentication using the built-in [AuthKit](https://www.authkit.com) provider for the `Streamable HTTP` transport, provide the AuthKit domain and redirect URL in the `.env` file. Check out the [AuthKit Provider](https://gofastmcp.com/servers/auth/remote-oauth#example%3A-workos-authkit-provider) section for more details.

### Interactive Prompts

Structured response messages are implemented using [prompts](https://gofastmcp.com/servers/prompts) that help guide the interaction, clarify missing parameters, and handle errors gracefully.

```python
@mcp.prompt(name="bacnet_help", tags={"bacnet", "help"})
def bacnet_help() -> list[Message]:
    """Provides examples of how to use the BACnet MCP server."""
    ...
```

Here are some example text inputs that can be used to interact with the server.

```text
Read the presentValue property of analogInput,1 at 10.0.0.4.
Fetch the units property of analogInput 2.
Write the value 42 to analogValue instance 1.
Set the presentValue of binaryOutput 3 to True.
```

## Examples

The `examples` folder contains sample projects showing how to integrate with the BACnet MCP server using various client APIs to provide tools and context to LLMs.

- [openai-agents](https://github.com/ezhuk/bacnet-mcp/tree/main/examples/openai-agents) - shows how to connect to the BACnet MCP server using the [OpenAI Agents SDK](https://openai.github.io/openai-agents-python/mcp/).
- [openai](https://github.com/ezhuk/bacnet-mcp/tree/main/examples/openai) - a minimal app leveraging remote MCP server support in the [OpenAI Python library](https://platform.openai.com/docs/guides/tools-remote-mcp).
- [pydantic-ai](https://github.com/ezhuk/bacnet-mcp/tree/main/examples/pydantic-ai) - shows how to connect to the BACnet MCP server using the [PydanticAI Agent Framework](https://ai.pydantic.dev).

## Docker

The BACnet MCP server can be deployed as a Docker container as follows:

```bash
docker run -d \
  --name bacnet-mcp \
  --restart=always \
  -p 8080:8000 \
  --env-file .env \
  ghcr.io/ezhuk/bacnet-mcp:latest
```

This maps port `8080` on the host to the MCP server's port `8000` inside the container and loads settings from the `.env` file, if present.

## License

The server is licensed under the [MIT License](https://github.com/ezhuk/bacnet-mcp?tab=MIT-1-ov-file).

## Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

- **Author:** [ezhuk](https://github.com/ezhuk)
- **Source:** [ezhuk/bacnet-mcp](https://github.com/ezhuk/bacnet-mcp)
- **License:** MIT

Install and usage instructions live in the source repository linked above.

## Pricing

- **Free** — Free

## Security capabilities

Automated source analysis of v0.1.0 — what this tool can access:

- **Network access:** no
- **Filesystem access:** no
- **Shell / process execution:** no
- **Environment & secrets:** yes
- **Dynamic code execution:** no

*"Yes" means the capability is present in the source — more access means more to trust, not that it is unsafe.*


## Versions

- **0.1.0** — security scan: passed — Imported from the upstream source.

## Links

- Listing page: https://agentstack.voostack.com/l/mcp-ezhuk-bacnet-mcp
- Seller: https://agentstack.voostack.com/s/ezhuk
- Browse the marketplace: https://agentstack.voostack.com/browse

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