Gemini

Gemini

Connect Gemini to the active workspace over MCP.
The connection reads by default; signed in, it changes nothing unless you turn on Allow changes, and a key never changes anything. Reach it from Settings → AI & agents → Gemini.

Gemini CLI: install the extension

This is the simplest route and needs no key. Twelfth publishes a Gemini CLI extension in the
open-source twelfth-ai/twelfth-mcp
repository. It adds the Twelfth server by URL and a skill that helps Gemini use
the tools well.

gemini extensions install https://github.com/twelfth-ai/twelfth-mcp

Then, inside Gemini CLI, run /mcp auth twelfth. Your browser opens Twelfth:
sign in, choose the workspace and the tools to allow, and select Allow
access. The consent screen says the connection returns to an app on this
computer. Ask Gemini a question about your workspace to confirm it works.

To end the connection, revoke it from Settings → AI & agents. Running
gemini extensions uninstall twelfth removes the extension from Gemini CLI but
does not end the connection in Twelfth.

Connect with a key

For owners and admins who need a workspace key instead:

  1. In Twelfth, open Settings → AI & agents, go to the Settings tab and, under API keys, choose Connect an agent → Gemini. Twelfth creates a key for this connection, copies it to your clipboard, and starts waiting for Gemini’s first request. Copy the key now if you need it again, because Twelfth shows it only once.
  2. In Gemini, add the Twelfth MCP endpoint shown on the connection’s row, with the key Twelfth just copied for you.
  3. Save, then ask Gemini to list its tools to confirm the connection.

Follow the exact steps on the connection’s row in Twelfth. It carries the current
endpoint and connector settings for your workspace.

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