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I built an MCP server for my voice assistant. By default, Home Assistant offers a few tools to the models, but I felt like it was missing some, so I built it.

I built an MCP server for my voice assistant. By default, Home Assistant offers a few tools to the models, but I felt like it was missing some, so I built it. It has tools to get real jokes, do math, unit conversion, get stock information, search the web with Kagi, and other things I consider to be essential in a voice assistant. It even got approved by my wife. At work I use our MCP server to debug and troubleshoot issues with our code too. Just yesterday I used it to figure out why a tag wasn’t showing up in traces; using the MCP server, the LLM was able to see that the tag was present in parent traces, but was lost along the way, and figured out why. Could I find that without the MCP server? Yes, but I’d take me hours of going through lengthy traces, while the MCP and LLM found the issue in minutes.

erikus 1mo ago
I use MCP for a voice assistant as well. I got a Pebble Index 01 ring and it has support for custom MCP servers. I run one on Tailscale and it can interact with Home Assistant, my home issue tracker, my Anki setup, etc. I've come full circle on MCP. With agents with a shell tool they quickly became unnecessary but these days I've been coming up with more agentic use cases where I don't want to give the agent a shell, and a narrower MCP interface is a great fit.
- jamesponddotco 1mo ago
  You just convinced me to buy a Pebble Index, which I was on the fence about. No idea it supported MCP servers.
qwerpy 1mo ago
> Home Assistant I've been using https://github.com/homeassistant-ai/ha-mcp https://github.com/homeassistant-ai/ha-mcp for my Home Assistant instance and it has been awesome. "What amps and charging schedule should I set my EV to charge at, so that at peak electricity rate time my house battery is at 90%." Looks at my house battery, car battery, current weather forecast, and house solar production, all of which are integrated into my Home Assistant. Looks at my gmail calendar. "16 amps, 9:30am-3:30pm, higher than usual because you're driving to lunch from 11am-12pm" (shows math). It can even go ahead and set it for me but I haven't given it read/write access to my car yet.

erikus 1mo ago

I use MCP for a voice assistant as well. I got a Pebble Index 01 ring and it has support for custom MCP servers. I run one on Tailscale and it can interact with Home Assistant, my home issue tracker, my Anki setup, etc. I've come full circle on MCP. With agents with a shell tool they quickly became unnecessary but these days I've been coming up with more agentic use cases where I don't want to give the agent a shell, and a narrower MCP interface is a great fit.

jamesponddotco 1mo ago
You just convinced me to buy a Pebble Index, which I was on the fence about. No idea it supported MCP servers.

qwerpy 1mo ago

> Home Assistant I've been using https://github.com/homeassistant-ai/ha-mcp https://github.com/homeassistant-ai/ha-mcp for my Home Assistant instance and it has been awesome. "What amps and charging schedule should I set my EV to charge at, so that at peak electricity rate time my house battery is at 90%." Looks at my house battery, car battery, current weather forecast, and house solar production, all of which are integrated into my Home Assistant. Looks at my gmail calendar. "16 amps, 9:30am-3:30pm, higher than usual because you're driving to lunch from 11am-12pm" (shows math). It can even go ahead and set it for me but I haven't given it read/write access to my car yet.