> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mcp-assistant.in/llms.txt
> Use this file to discover all available pages before exploring further.

# Gateway Configuration

> Configure the MCP Gateway to expose local MCP servers to cloud clients like ChatGPT and Claude, including server lists, auth, and connection settings.

The MCP Gateway reads its server definitions from a simple JSON configuration file.

### File Location

The configuration file is located at the following path based on your operating system:

* **Windows**: `%USERPROFILE%\.mcpassistant\mcp.json`
* **UNIX/macOS**: `~/.mcpassistant/mcp.json`

### mcp.json Structure

Add your local MCP servers to the `mcpServers` object. The Gateway will automatically discover these when you run the `/start` command.

```json theme={null}
{
  "mcpServers": {
    "my-local-server": {
      "command": "node",
      "args": ["C:/path/to/server/index.js"]
    }
  }
}
```

Once configured, these servers will be tunneled to secure remote URLs that can be used by cloud clients like **ChatGPT**, **Claude**, and the **MCP Assistant**.