Lunar Calendar MCP Server

中文 | English

A Model Context Protocol (MCP) server for Chinese traditional calendar functions, built with Python 3.12 and lunar-python.

🚀 Quick Start (Recommended)

One-Command Launch with UVX

uvx bach-lunar-mcp

That's it! No installation, no virtual environment setup, no dependencies to manage. UVX will automatically download and run the server.

Configure in Your MCP Client

Cursor IDE

{
  "mcpServers": {
    "lunar-calendar": {
      "command": "uvx",
      "args": ["bach-lunar-mcp"]
    }
  }
}

Claude Desktop

{
  "mcpServers": {
    "lunar-calendar": {
      "command": "uvx",
      "args": ["bach-lunar-mcp"]
    }
  }
}

Cherry Studio

{
  "mcpServers": {
    "lunar-calendar": {
      "command": "uvx",
      "args": ["bach-lunar-mcp"]
    }
  }
}

📦 PyPI Package: https://pypi.org/project/bach-lunar-mcp/
📖 Quick Start Guide: QUICKSTART_UVX.md

Features

🎋 BaZi Calculation - Calculate eight characters for fortune telling
📅 Calendar Conversion - Convert between solar and lunar calendars
🌙 Huangli Query - Chinese almanac with daily recommendations
🔮 Daily Fortune - Daily fortune and recommendations
⭐ Solar Terms - Query 24 solar terms for any year
🧮 Wu Xing Analysis - Five elements analysis from birth info

Installation

Prerequisites

• Python 3.12+

• uv package manager

Setup

1. Clone the repository:

git clone <repository-url>
cd lunar-mcp-server

2. Install uv (if not already installed):

curl -LsSf https://astral.sh/uv/install.sh | sh

3. Install project with dependencies:

uv sync

This will automatically:

• Create a virtual environment with Python 3.12

• Install all dependencies from pyproject.toml

• Generate uv.lock for reproducible builds

Usage

As MCP Server

Configure in your MCP client (e.g., Claude Desktop):

{
  "mcpServers": {
    "lunar-calendar": {
      "command": "uv",
      "args": ["run", "python", "-m", "src.server"],
      "cwd": "/path/to/lunar-mcp-server"
    }
  }
}

Direct Usage

You can also use the helper functions directly:

# Run with uv
uv run python -c "
from src.utils import LunarHelper
result = LunarHelper.solar_to_lunar(2024, 1, 1)
print(result['lunar_date_chinese'])  # 二〇二三年冬月二十
"

# Calculate BaZi
uv run python -c "
from src.utils import LunarHelper
result = LunarHelper.get_bazi(1990, 1, 1, 8, 30)
print(result['bazi_string'])  # 己巳 丙子 丙寅 壬辰
"

Available Tools

1. bazi_calculate

Calculate BaZi (Eight Characters) for fortune telling.

Parameters:

• birth_date: Birth date in YYYY-MM-DD format

• birth_time: Birth time in HH:MM format

Example:

{
  "birth_date": "1990-01-01",
  "birth_time": "08:30"
}

2. calendar_convert

Convert between solar and lunar calendars.

Parameters:

• date: Date in YYYY-MM-DD format

• convert_to: "lunar" or "solar"

• is_leap: Is leap month (optional)

Example:

{
  "date": "2024-01-01",
  "convert_to": "lunar"
}

3. huangli_query

Query Chinese almanac information for a specific date.

Parameters:

• date: Date in YYYY-MM-DD format

Example:

{
  "date": "2024-01-01"
}

4. fortune_daily

Get daily fortune and recommendations.

Parameters:

• date: Date in YYYY-MM-DD format

Example:

{
  "date": "2024-01-01"
}

5. jieqi_query

Query 24 solar terms for a specific year.

Parameters:

• year: Year to query

Example:

{
  "year": 2024
}

6. wuxing_analyze

Analyze Wu Xing (Five Elements) from birth information.

Parameters:

• birth_date: Birth date in YYYY-MM-DD format

• birth_time: Birth time in HH:MM format

Example:

{
  "birth_date": "1990-01-01",
  "birth_time": "08:30"
}

Development

Running Tests

# Quick functionality test
uv run python quick_test.py

# Run MCP server
uv run python run_server.py

# Test specific functionality
uv run python -c "from src.utils import LunarHelper; print('✅ Import works!')"

# Install dev dependencies (optional)
uv add --dev pytest black mypy

Code Formatting

# Format code
black src/
isort src/

# Type checking
mypy src/

Dependencies

• mcp: Model Context Protocol implementation

• lunar-python: Chinese lunar calendar library

• pydantic: Data validation and settings management

Contributing

1. Fork the repository

2. Create your feature branch

3. Commit your changes

4. Push to the branch

5. Create a Pull Request

License

This project is licensed under the MIT License - see the LICENSE file for details.

Acknowledgments

• lunar-python - Excellent Chinese lunar calendar library

• MCP - Model Context Protocol specification

Note: This is a traditional calendar tool for educational and entertainment purposes. Please use responsibly.