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mcp-httc

mcp-httc

by john-r-black
OverviewSchemaSourceRelated ServersDiscussionsAdmin
Python
Remote

mcp-httc

MCP server wrapping Honeywell Total Connect Comfort (legacy mytotalconnectcomfort.com) so John can drive Deer Park UMC's 13 thermostats from any Claude surface.

Sister projects on the same Raspberry Pi: mcp-ui, mcp-google, mcp-pco.

  • Stack: Python 3.13, FastAPI, FastMCP, AIOSomecomfort, aiohttp.

  • Backend: AIOSomecomfort (the same library Home Assistant uses) — the only Python/JS option that keeps up with Honeywell's periodic portal breakages.

  • Transport: Streamable HTTP only; OAuth 2.1 with HS256 JWTs and a shared login password (1:1 port of mcp-ui's auth model).

  • Deployment: systemd on the Pi, Cloudflare Tunnel ingress at https://httc.1421mcps.com. See references/2026-04-16_initial-deployment.md once the first deploy is written up.

Tools (v1)

Tool

Purpose

list_thermostats

All devices with current temp, humidity, mode, fan, setpoints, hold state

get_thermostat

One device by name (case-insensitive) or numeric id

set_setpoint

Heat and/or cool setpoint with hold_type ∈ {temporary, permanent, cancel}

set_mode

System mode: heat / cool / auto / off

set_fan_mode

Fan: auto / on / circulate

set_humidity_setpoint

Humidity setpoint (only on devices that have a humidifier)

Schedule read/write and background polling/monitoring are out of scope for v1.

Deploy a code change

git push origin main
ssh 1421mcp 'cd mcp-httc && git pull && \
  .venv/bin/pip install -r requirements.txt && \
  sudo systemctl restart mcp-httc && \
  sudo journalctl -u mcp-httc -f --since "10 seconds ago"'

This server cannot be deployed

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Resources

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