Connect Google Antigravity

Google's agentic IDE and CLI. Since 2.x the IDE, the agy CLI and the SDK read one shared MCP config.

Shared: ~/.gemini/config/mcp_config.json · Per workspace: .agents/mcp_config.json

Before you start

Create an API key in the app under Settings, then API Keys. Grant only the permissions this agent needs. The key is shown once. Replace pk_live_xxx in the snippets below with it.

Local install

Runs the MCP server on your own machine through npx, so your key never leaves it. Needs Node 18 or newer.

json

{
  "mcpServers": {
    "planpost": {
      "command": "npx",
      "args": ["-y", "planpost-mcp"],
      "env": { "PLANPOST_API_KEY": "${PLANPOST_API_KEY}" }
    }
  }
}

Things that catch people out

Antigravity substitutes ${VAR_NAME} from the environment, so export PLANPOST_API_KEY in your shell rather than pasting the key into the file.
In the IDE you can reach the same file via the agent panel: ... menu -> MCP Servers -> Manage MCP Servers -> View raw config.
Custom servers sit alongside the built-in MCP Store; a server added in the raw config appears with the store-installed ones.

Check it works

Ask the agent to list your connected accounts. If it comes back with them, all 47 tools are available.

prompt

Which social accounts do I have connected on planpo.st?

Google Antigravity MCP documentation All 47 tools REST API reference

← Docs