Google Antigravity

Google Antigravity can use Memside as an MCP server while an agent works inside the IDE. This gives the agent access to selected Memories, checkpoints, Operating Rules, and other saved project context.

Antigravity currently uses an MCP configuration file for this setup. A native remote-server option can be used instead when it is available in the installed version.

Before starting

Sign in to Memside.
Open Settings > Developer & API.
Create an API key and copy it when shown.
Open Google Antigravity.

Open the MCP configuration

Open Settings.
Select Open Antigravity user settings.
Open Customizations.
Select Open MCP Config.
Confirm that mcp_config.json opens.

Add Memside

Add the following server entry and replace the placeholder with the Memside API key:

{
  "mcpServers": {
    "memside": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://api.memside.com/mcp/",
        "--header",
        "Authorization: Bearer mem_sk_your_memside_api_key"
      ]
    }
  }
}

Save the file, close the settings, and restart Antigravity.

Common configuration locations:

Windows: %USERPROFILE%\.gemini\antigravity\mcp_config.json
macOS: ~/.gemini/antigravity/mcp_config.json

If Antigravity offers a native OAuth remote-server flow, add Memside with https://api.memside.com/mcp/ and complete the Memside sign-in instead of placing an API key in the configuration.

Confirm the connection

Open the MCP server list and confirm that memside is running and its tools are visible.

Then start with a read-only request:

Use Memside to find the latest checkpoint and explain the next step.

Troubleshooting

Restart Antigravity after saving the configuration.
Check that mcp_config.json contains valid JSON.
Confirm that the API key is active.
Use the built-in MCP server interface if the raw configuration format has changed in the installed release.