Home Assistant with Home MCP in ChatGPT and Codex

Hombee Free

Start with your own Home Assistant

You do not need a Hombee home or a smart-home installation from Hombee.

  1. Install Hombee from the App Store or Google Play.
  2. Open the app, choose Home Assistant, add the address of your instance and select Sign in with Home Assistant.
  3. Add this Streamable HTTP server in ChatGPT or Codex:
https://hombee.app/mcp

Add Home MCP in the ChatGPT desktop app

  1. Open Settings, then MCP servers.
  2. Select Add server.
  3. Name the server Hombee Home MCP, choose Streamable HTTP and paste https://hombee.app/mcp.
  4. Save the server and restart the app.
  5. Select Authenticate and finish Hombee authorization in your browser.

Type /mcp in the composer to check that the Hombee server is connected.

Add Home MCP in ChatGPT web

  1. Open Settings, select Security and login, then enable Developer mode if your account and workspace allow it.
  2. Open ChatGPT Plugins and select the plus button.
  3. Name the connection Hombee Home MCP and enter https://hombee.app/mcp as the public MCP server URL.
  4. Create the connection, review the discovered tools and finish Hombee authorization.
  5. Start a new conversation and add Hombee from the tools menu.

Workspace administrators can restrict developer mode and plugin access. If these controls are missing, the Hombee URL is not the cause.

Add Home MCP in Codex

The ChatGPT desktop app, Codex CLI and Codex IDE extension share MCP configuration on the same Codex host. You can add Hombee in the desktop app, or run:

codex mcp add hombee --url https://hombee.app/mcp
codex mcp login hombee

Run codex mcp list or open /mcp in the Codex terminal interface to check the connection.

Verify Home Assistant access safely

Start with a read-only request that names the connected home:

Using Hombee Home MCP, list the rooms and summarize which Home Assistant capabilities are currently available. Do not change anything.

Check that ChatGPT or Codex shows a Hombee tool call and a result consistent with the Hombee app. The available tools match your connected Home Assistant instance and permissions, so another person may see a different list.

Before a state-changing request, name the target explicitly and ask ChatGPT to explain the proposed action first. Confirm only after the room, device and consequence are correct.

Troubleshooting

  • No developer mode or plugin controls in ChatGPT web: check your account and workspace policy.
  • Authorization repeats: remove the incomplete Hombee connection, add it again and finish the browser flow with one Hombee account.
  • The server connects but no home tools appear: confirm that Home Assistant is connected and synchronized in the Hombee app, then restart the client to repeat tool discovery.
  • Codex reports that the server needs authentication: run codex mcp login hombee and finish the browser flow.

For the security model behind the discovered tools, continue to the Home MCP capabilities and safety reference.

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