Install in Antigravity

One config block; the IDE, CLI and SDK all pick it up.

1 · Open the config

In the agent panel click … → MCP Servers → Manage MCP Servers → View raw config.

2 · Add the server

Add this to ~/.gemini/config/mcp_config.json and save. The field must be serverUrl: Antigravity ignores url.

{
  "mcpServers": {
    "brain": { "serverUrl": "https://brain.levirge.com/mcp" }
  }
}

3 · Sign in

Open Agent Settings (⌘,) → Customizations, click Authenticate next to brain, sign in, paste the code back, and click Submit.

4 · Verify

Ask for a read-only call: kb_overview returns your workspace's knowledge summary.

Using a token instead

For machines that cannot open a browser (CI, a server). Get a token first, add a headers line, and skip the Authenticate step:

{
  "mcpServers": {
    "brain": {
      "serverUrl": "https://brain.levirge.com/mcp",
      "headers": { "Authorization": "Bearer <your-token>" }
    }
  }
}

Troubleshooting

The server is ignored. The field must be serverUrl. Antigravity does not read url or httpUrl.

Authenticate asks me for a code. That is normal: sign in in the browser, copy the code it shows, paste it into the Antigravity dialog and click Submit.

"401" or "Unauthorized" with a token. Check the header is exactly Authorization: Bearer <your-token>, and that the token has not been revoked on Profile → MCP Tokens.

Other clients

Every guide is listed under any MCP client. No workspace yet? Request access.