MCP Community Tools - Model Context Protocol Server

A professional-grade MCP (Model Context Protocol) server that provides tools for querying community and world databases. Designed with clean architecture patterns and ready for integration with GitHub Copilot.

🎯 Quick Start

1. Connect to GitHub Copilot (3 steps)

See QUICK_START.md for instant setup.

TL;DR:

1. Open VS Code Settings (Cmd+,)
2. Add this to settings.json:

{
  "github.copilot.mcp": [
    {
      "name": "mcp-community-tools",
      "command": "${workspaceFolder}/.venv/bin/python3",
      "args": ["${workspaceFolder}/hello_mcp.py"],
      "env": {"PYTHONPATH": "${workspaceFolder}"}
    }
  ]
}

3. Restart VS Code

2. Ask Copilot

Now you can ask Copilot to use your tools:

• "Get the top 10 highest comments"
• "Show me 5 countries from Europe"
• "Generate a random name"

---

📚 Available Tools

Tool	Description	Example
get_random_name()	Generate a random name	get_random_name()
get_top_10_highest_comments()	Get top 10 users by message count	Returns: Top 10 chatters
fetch_countries()	Query countries by region and limit	fetch_countries(region="Asia", limit=5)

---

🏗️ Project Structure

mcp-course/
├── hello_mcp.py                    # Main entry point (50 lines - clean!)
├── setup-copilot.sh               # Auto-generate config helper
├── QUICK_START.md                 # 3-step Copilot integration
├── SETUP_COPILOT.md              # Detailed setup guide
├── ARCHITECTURE.md                # Design patterns & structure
├── INTEGRATION_DIAGRAM.md         # Visual flow diagrams
├── REFACTORING_SUMMARY.md         # Before/after comparison
│
├── db_connection/
│   └── connection.py              # Database Connection Factory
│
├── repositories/
│   ├── base_repository.py         # Abstract Base Class
│   ├── chatters_repository.py     # Community data queries
│   └── countries_repository.py    # World data queries
│
├── tools/
│   └── tools.py                   # Tool implementations (DI)
│
└── db/
    ├── community.db               # Chatters data (251 records)
    └── world.db                   # Countries data (250 records)

---

✨ Key Features

🎯 Clean Architecture

• Repository Pattern: Database access abstraction
• Dependency Injection: Loose coupling between layers
• Factory Pattern: Centralized connection management
• SOLID Principles: All five principles applied

🛡️ Professional Code

• ✅ Type hints throughout
• ✅ Comprehensive error handling
• ✅ Well-documented with docstrings
• ✅ Easy to test and extend

🚀 Ready for Production

• ✅ Works with GitHub Copilot
• ✅ Works with Claude Desktop
• ✅ Works with any MCP-compatible client
• ✅ Secure local execution

---

📖 Documentation

Document	Purpose
QUICK_START.md	Get Copilot working in 3 steps
SETUP_COPILOT.md	Detailed setup & troubleshooting
ARCHITECTURE.md	Design patterns & principles
INTEGRATION_DIAGRAM.md	Visual flows and connections
REFACTORING_SUMMARY.md	Before/after code comparison

---

🚀 Running Locally

Prerequisites

• Python 3.11+
• Virtual environment (venv)

Setup

# Clone and enter directory
cd /Users/souravkumar/WebstormProjects/mcp-course

# Activate virtual environment
source .venv/bin/activate

# Install dependencies (if needed)
pip install -r requirements.txt

Run Server

python3 hello_mcp.py

Output should show:

Server started on stdio

---

🔌 Integration Options

Option 1: GitHub Copilot in VS Code ✅ RECOMMENDED

See QUICK_START.md

Option 2: Claude Desktop App

See SETUP_COPILOT.md - Claude Desktop section

Option 3: Manual Testing

# Terminal 1: Start server
python3 hello_mcp.py

# Terminal 2: Test tools
curl -X POST http://localhost:3000/call \
  -H "Content-Type: application/json" \
  -d '{"tool": "get_top_10_highest_comments"}'

---

💾 Databases

community.db

SELECT * FROM chatters;
-- id, name, messages, last_message_at

251 community members with activity tracking

world.db

SELECT * FROM countries;
-- id, name, iso2, iso3, capital, region, subregion, currency, currency_symbol, phonecode, emoji

250 countries with detailed information

---

🛠️ Example Usage with Copilot

Example 1: Get Top Commenters

You: "Who are the top 10 most active community members?"

Copilot:
✓ Calls: get_top_10_highest_comments()
✓ Returns: Top 10 users with message counts
✓ Shows: Their last activity timestamps

Example 2: Find Countries

You: "Show me all European countries and their capitals"

Copilot:
✓ Calls: fetch_countries(region="Europe")
✓ Returns: All 50 European countries
✓ Shows: Capital, currency, phone code, flag emoji

Example 3: Generate Names

You: "Give me 5 random names"

Copilot:
✓ Calls: get_random_name() (5 times)
✓ Returns: 5 random names from the list

---

🏛️ Architecture at a Glance

┌─────────────────────────────────────────┐
│      GitHub Copilot / Claude            │
└──────────────────┬──────────────────────┘
                   │ MCP Protocol (JSON-RPC)
                   ▼
┌─────────────────────────────────────────┐
│  hello_mcp.py (Tool Registration)       │
│  ├─ @mcp.tool() decorators             │
│  └─ Dependency injection setup          │
└──────────────────┬──────────────────────┘
                   │
                   ▼
┌─────────────────────────────────────────┐
│  tools/tools.py (Business Logic)        │
│  ├─ TopCommentsTool                    │
│  ├─ CountriesTool                      │
│  └─ RandomNameTool                     │
└──────────────────┬──────────────────────┘
                   │
                   ▼
┌─────────────────────────────────────────┐
│  repositories/ (Data Access)            │
│  ├─ ChattersRepository                 │
│  ├─ CountriesRepository                │
│  └─ BaseRepository (Abstract)          │
└──────────────────┬──────────────────────┘
                   │
                   ▼
┌─────────────────────────────────────────┐
│  db_connection/ (Connection Factory)    │
└──────────────────┬──────────────────────┘
                   │
                   ▼
┌─────────────────────────────────────────┐
│  db/ (SQLite Databases)                 │
│  ├─ community.db                       │
│  └─ world.db                           │
└─────────────────────────────────────────┘

---

📊 SOLID Principles Applied

✅ Single Responsibility: Each class has one reason to change
✅ Open/Closed: Open for extension, closed for modification
✅ Liskov Substitution: Repositories are interchangeable
✅ Interface Segregation: Minimal required interfaces
✅ Dependency Inversion: Depend on abstractions, not concretions

---

🔐 Security

• ✅ Local Execution: Runs on your machine only
• ✅ No Data Upload: All data stays local
• ✅ No Authentication: Local database access
• ✅ Read-Only: Tools only query, don't modify data

---

🧪 Testing

Run Tests (when available)

pytest tests/

Manual Testing

from repositories.chatters_repository import ChattersRepository
from db_connection.connection import DatabaseConnection

conn = DatabaseConnection.get_connection("community.db")
repo = ChattersRepository(conn)
results = repo.get_top_highest_comments(10)
print(results)
repo.close()

---

🤝 Contributing

To add a new tool:

1. Create a Repository (if needed):

   # repositories/my_data_repository.py
   class MyDataRepository(BaseRepository):
       def get_data(self): 
           return self.execute_query("SELECT * FROM my_table")
   

2. Create a Tool:

   # In tools/tools.py
   class MyDataTool:
       def __init__(self, repository):
           self.repository = repository
       def execute(self):
           return self.repository.get_data()
   

3. Register in hello_mcp.py:

   @mcp.tool()
   def my_data_tool() -> list[dict]:
       conn = DatabaseConnection.get_connection("my_db.db")
       repo = MyDataRepository(conn)
       tool = MyDataTool(repo)
       return tool.execute()
   

---

📞 Troubleshooting

Common Issues

Issue	Solution
"Tool not found" in Copilot	Restart VS Code completely (Cmd+Q)
"ModuleNotFoundError"	Check PYTHONPATH in config
Connection timeout	Verify hello_mcp.py runs without errors
Tools not available	Wait 10 seconds after restart for extension load

For detailed troubleshooting, see SETUP_COPILOT.md

---

📝 License

MIT License - Feel free to use, modify, and distribute.

---

🎓 Learning Resources

• MCP Protocol Documentation
• Design Patterns
• SOLID Principles
• Repository Pattern

---

✅ Quick Checklist

• [ ] Read QUICK_START.md
• [ ] Copy configuration to settings.json
• [ ] Restart VS Code
• [ ] Test with Copilot
• [ ] Read ARCHITECTURE.md to understand design
• [ ] Check INTEGRATION_DIAGRAM.md for visuals

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🚀 You're Ready!

Your MCP server is production-ready. Enjoy using it with GitHub Copilot! 🎉

Questions? Check the documentation files or the troubleshooting section above.