How to add MCP servers to Antigravity CLI

Add a local server

Edit ~/.gemini/config/mcp_config.json (all projects) or .agents/mcp_config.json (this project):

{
  "mcpServers": {
    "my-server": {
      "command": "npx",
      "args": ["-y", "some-mcp-package"],
      "env": { "API_KEY": "your-key" }
    }
  }
}

Add a remote server

Use serverUrl. The old Gemini CLI keys url and httpUrl need renaming.

{ "mcpServers": { "my-server": { "serverUrl": "https://example.com/mcp" } } }

Skills

Put skill folders (each with a SKILL.md) in ~/.gemini/antigravity-cli/skills/, or .agents/skills/ for one project. Skills in an old .gemini/skills/ folder need moving to .agents/skills/.

Coming from Gemini CLI

The first time you run agy, it detects your old Gemini CLI settings. Old extensions, now called Antigravity plugins, are converted with:

agy plugin import gemini