# 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

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

## Open the MCP configuration

1. Open **Settings**.
2. Select **Open Antigravity user settings**.
3. Open **Customizations**.
4. Select **Open MCP Config**.
5. Confirm that `mcp_config.json` opens.

## Add Memside

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

```json
{
  "mcpServers": {
    "memside": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://api.memside.com/mcp/",
        "--header",
        "Authorization: Bearer mem_sk_example_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:

```text
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.

## Next steps

- [Connection overview](/connect/mcp-and-api/)
- [API keys](/developers/api-keys/)
- [Troubleshooting](/help/troubleshooting/)