Install MRVN DE Open Data MCP in Devin Desktop

What you need first

• Devin Desktop, installed.
• Nothing else: the server runs on its publisher's machines and Devin Desktop connects to it.
• Your own value for YOUR_X_RAPIDAPI_KEY.

Steps

1. Open ~/.config/devin/mcp_config.json, or create it. On Windows it is %APPDATA%\devin\mcp_config.json.
2. Add this block. If the file already has mcpServers, add only the entry inside it.

{
  "mcpServers": {
    "mrvn-de-opendata-mcp": {
      "url": "https://de-opendata-mcp.pages.dev/mcp",
      "headers": { "X-RapidAPI-Key": "YOUR_X_RAPIDAPI_KEY" }
    }
  }
}

3. Replace YOUR_X_RAPIDAPI_KEY with your own value.
4. Save the file and restart Devin Desktop.

Check it worked

Ask Devin Desktop: List the tools of mrvn-de-opendata-mcp.

If it does not start

401 Unauthorized

The endpoint wants a sign-in or a key. Sign in when Devin Desktop asks, or check the value in place of the placeholder.

The server starts, but its tools fail

A YOUR_… placeholder is still in the config, or its value is wrong.

Nothing changes after a restart

The file is not valid JSON any more. Look for a missing comma where the block was added.