How do I know the server is connected?

A hammer icon appears in Claude Desktop when the MCP server is connected.

How do I troubleshoot a missing hammer icon?

Ensure Claude Desktop is up to date, verify the configuration file path is correct, check that Node.js is accessible, and review Claude Desktop logs (Windows: `%APPDATA%\Claude\logs\`, macOS: `~/Library/Logs/Claude/`).

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🍋 Lemonade Stand MCP Server

A simple, working example of a Model Context Protocol (MCP) server that lets you play the classic Lemonade Stand game through Claude Desktop.

Local serverstdio

What is the 🍋 Lemonade Stand MCP Server?

A simple, working example of a Model Context Protocol (MCP) server that lets you play the classic Lemonade Stand game through Claude Desktop.

The short version

Model Context Protocol (MCP) is an open standard that enables AI models like Claude to interact with external data sources and tools. This server demonstrates how MCP works by implementing the classic Lemonade Stand game as a set of tools that Claude can use.

🌤️ Dynamic weather system affecting sales
💰 Business simulation with supply and demand
📊 Strategic pricing and inventory management
🏁 14-day game cycle with profit tracking
🎮 Fully playable through Claude Desktop

What it needs from you

Node.js (v20.11.1 or higher recommended) - Claude Desktop - npm (comes with Node.js)

More MCP options

Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.

Maintainer setup documentation.

Recorded tools

Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.

Tool	What it does
start_game	Begin a new game session
get_game_state	Check current status, money, inventory, and weather
buy_supplies	Purchase cups, lemons, sugar, and ice
set_price	Set the price per cup of lemonade
sell_lemonade	Open for business and see daily results
next_day	Advance to the next day

How to install the 🍋 Lemonade Stand MCP Server

{
     "mcpServers": {
       "lemonade-stand": {
         "command": "node",
         "args": [
           "/absolute/path/to/Lemonade-Stand-MCP-Server/server.js"
         ]
       }
     }
   }

Configuration as documented by the project. Restart the client after saving.