GrumpyDev MCP server

The Grumpy Senior Developer MCP server provides code reviews with a sarcastic, cynical tone mimicking a grumpy senior developer. It analyzes your code and highlights potential issues, making it useful for both experienced developers and those learning best practices.

Installation Requirements

Before installing, ensure you have Node.js 20+ installed on your system.

Integration Methods

GitHub Copilot Integration

To use this MCP server with GitHub Copilot:

Important: MCP support in VS Code requires either enabling Agent mode or using VS Code Insiders.

Option 1: Command Line Installation

# For VS Code
code --add-mcp '{"name":"grumpydev","command":"npx","args":["-y","grumpydev-mcp"]}'

# For VS Code Insiders
code-insiders --add-mcp '{"name":"grumpydev","command":"npx","args":["-y","grumpydev-mcp"]}'

Option 2: Manual Configuration

Add this to your .vscode/mcp.json file in your workspace:

{
  "servers": {
    "grumpydev-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "grumpydev-mcp"
      ]
      // Optional: "envFile": "${workspaceFolder}/.env"
    }
  }
}

Claude Desktop Integration

Add this to your claude_desktop_config.json:

{
  "mcpServers": {
    "grumpydev-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "grumpydev-mcp"
      ]
      // Optional model configuration:
      // "env": {
      //   "GENAISCRIPT_DEFAULT_MODEL": "<your_model_config>"
      // }
    }
  }
}

Testing with MCP Inspector

1. Start MCP Inspector:

   npx -y @modelcontextprotocol/inspector
   

2. Open the inspector interface by clicking the URL shown (typically http://127.0.0.1:6274)

3. Configure the connection:

   • Command: npx
   • Arguments: -y grumpydev-mcp
   • Click Connect

4. Go to the Tools tab, select List Tools, then click on a tool and select Run Tool

Model Configuration

You can customize the model used by setting the GENAISCRIPT_DEFAULT_MODEL environment variable:

GENAISCRIPT_DEFAULT_MODEL=github:gpt-4o

By default, the server uses GitHub Models with GPT-4o. You can use any provider/model supported by GenAIScript. Some models may require additional configuration through environment variables, such as API keys.

How to add this MCP server to Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > MCP and click "Add new global MCP server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

{
    "mcpServers": {
        "cursor-rules-mcp": {
            "command": "npx",
            "args": [
                "-y",
                "cursor-rules-mcp"
            ]
        }
    }
}

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explictly ask the agent to use the tool by mentioning the tool name and describing what the function does.