Home Assistant MCP Reporter

This repository contains a minimal Python MCP server packaged as a Home Assistant add-on.

What it does

The server exposes one MCP tool:

• postReport

postReport accepts a JSON object and forwards it to the configured Power Automate webhook.

Authentication

The add-on requires an API key configured from the Home Assistant add-on config page.

Send the API key in either of these headers when calling the MCP endpoint:

• X-API-Key: <your-key>

• Authorization: Bearer <your-key>

Local development

python -m venv .venv
.venv\Scripts\Activate.ps1
pip install -e .
python -m mcp_reporter_server

The server listens on 0.0.0.0:8099 using streamable HTTP transport at /.

For discovery, the server also exposes authenticated tool-list endpoints at:

• GET /tools

• POST /tools

Home Assistant installation

1. Add this repository as an add-on repository in Home Assistant.

2. Install the MCP Reporter add-on.

3. Start the add-on.

4. Connect your MCP client to http://homeassistant.local:8099/ or the add-on host/IP on port 8099.

Notes

• The webhook URL is baked in by default to match the requested behavior.

• You can override it with the POWER_AUTOMATE_WEBHOOK_URL environment variable if needed.