SNCF Server

A Model Context Protocol (MCP) server for querying SNCF (French national railway) train schedules using the official Navitia API. Integrates seamlessly with Claude Desktop and other MCP-compatible clients.

Python 3.12+ FastMCP License: MIT

✨ Features

• 🔍 Search trains between any two French cities with real-time data
• 🚉 Find stations in any city across France
• 📅 Flexible date parsing - accepts ISO, European, and written date formats
• ⚡ Real-time data - uses official SNCF Navitia API with live timetables
• 🎯 Smart journey planning - shows transfers, duration, and route details
• 🌍 International routes - supports cross-border journeys (e.g., Paris-Munich)
• 🛠️ Claude Desktop ready - works out of the box with MCP clients

🚀 Quick Start

Prerequisites

• Python 3.12 or higher
• uv (recommended) or pip
• SNCF API key (free registration)

Installation

1. Clone the repository

   git clone https://github.com/belgrano9/sncf_mcp_server.git
   cd sncf_mcp_server
   

2. Install dependencies

   uv sync
   

3. Get your SNCF API key

   • Register at SNCF Digital API Portal
   • Request access to the Navitia API
   • Copy your API key

4. Configure environment variables

   Create a .env file in the project root:

   SNCF_API=your-api-key-here
   

   ⚠️ IMPORTANT: Never commit your .env file! It's already in .gitignore.

5. Test the server

   uv run server.py
   

📖 Usage

Standalone Testing

Test the search functionality directly in Python:

from server import search_trains, find_station

# Search for trains
result = search_trains("Paris", "Lyon", "2025-11-20 14:00")
print(result)

# Find a station
stations = find_station("Paris")
print(stations)

Or use the included Jupyter notebook (test_notebook.ipynb) for interactive testing.

Claude Desktop Integration

Add to your Claude Desktop config file:

Windows (%APPDATA%\Claude\claude_desktop_config.json):

{
  "mcpServers": {
    "sncf": {
      "command": "uv",
      "args": [
        "--directory",
        "C:\\Users\\YourName\\path\\to\\sncf_mcp_server",
        "run",
        "server.py"
      ]
    }
  }
}

macOS (~/Library/Application Support/Claude/claude_desktop_config.json):

{
  "mcpServers": {
    "sncf": {
      "command": "uv",
      "args": [
        "--directory",
        "/path/to/sncf_mcp_server",
        "run",
        "server.py"
      ]
    }
  }
}

Linux (~/.config/Claude/claude_desktop_config.json):

{
  "mcpServers": {
    "sncf": {
      "command": "uv",
      "args": [
        "--directory",
        "/path/to/sncf_mcp_server",
        "run",
        "server.py"
      ]
    }
  }
}

Restart Claude Desktop, and you can ask:

• "Show me trains from Paris to Lyon tomorrow at 2pm"
• "What's the earliest train from Paris Gare de l'Est to Munich tomorrow?"
• "Find all train stations in Paris"
• "How long does it take to get from Bordeaux to Marseille?"

🛠️ MCP Tools

1. search_trains

Find trains between two stations with real-time data.

Parameters:

• origin (string): Origin station/city name (e.g., "Paris", "Lyon", "Paris Gare de l'Est")
• destination (string): Destination station/city name (e.g., "München Hbf", "Barcelona")
• departure_datetime (string, optional): Travel date/time in flexible formats:
  • ISO: "2025-11-28 08:00" (recommended)
  • European: "28/11/2025 08:00"
  • Written: "November 28, 2025 8:00am"
  • Default: current time

Example Output:

═══════════════════════════════════
    SNCF JOURNEY SEARCH
═══════════════════════════════════

🔍 Searched for 'Paris Est':
  ✓ Paris Gare de l'Est (ID: stop_area:SNCF:...)
    Paris - Bercy (ID: stop_area:SNCF:...)
    Paris Montparnasse (ID: stop_area:SNCF:...)

→ Selected: Paris Gare de l'Est

🔍 Searched for 'München Hbf':
  ✓ München Hauptbahnhof (ID: stop_area:OCE:...)

→ Selected: München Hauptbahnhof

📅 Searching for trains departing after: 2025-11-28 08:00
🔄 API datetime format: 20251128T080000

─────────────────────────────────
🚄 AVAILABLE TRAINS
─────────────────────────────────

Found 5 journey option(s):

  1. Depart: 2025-11-28 08:55 → Arrive: 2025-11-28 14:54
     Duration: 5h 59min | Direct

  2. Depart: 2025-11-28 10:55 → Arrive: 2025-11-28 16:54
     Duration: 5h 59min | Direct

  3. Depart: 2025-11-28 12:55 → Arrive: 2025-11-28 19:18
     Duration: 6h 23min | 1 change(s)
     Route: Paris Gare de l'Est → Stuttgart Hbf | Stuttgart Hbf → München Hbf

═══════════════════════════════════

2. find_station

Search for train stations in a city or by name.

Parameters:

• station_name (string): Station/city name to search (e.g., "Paris", "Lyon Part-Dieu")

Example Output:

═══════════════════════════════════
    STATION SEARCH
═══════════════════════════════════

🔍 Searched for 'Paris':
  ✓ Paris Gare de Lyon (ID: stop_area:SNCF:87686006)
    Paris Montparnasse (ID: stop_area:SNCF:87391003)
    Paris Gare du Nord (ID: stop_area:SNCF:87271007)

→ Selected: Paris Gare de Lyon

✅ Best match: Paris Gare de Lyon
   ID: stop_area:SNCF:87686006

═══════════════════════════════════

3. get_train_prices ⚠️ EXPERIMENTAL

Educational Proof of Concept Only - May Not Work

Attempts to scrape price information from SNCF's booking system.

⚠️ IMPORTANT DISCLAIMERS:

• This is an experimental feature for educational purposes only
• May violate SNCF's Terms of Service
• Likely blocked by anti-scraping measures (403 Forbidden)
• NOT recommended for production use
• For real pricing, use commercial APIs (Lyko, Trainline) or SNCF Connect website

Parameters:

• origin (string): Origin station/city name
• destination (string): Destination station/city name
• departure_datetime (string, optional): Travel date/time (same formats as search_trains)
• page (integer, optional): Page number (default: 1)
• per_page (integer, optional): Results per page (default: 5, max: 20)

Example Output (if it worked):

═══════════════════════════════════
  SNCF PRICE CHECK (EXPERIMENTAL)
═══════════════════════════════════

⚠️  WARNING: Experimental feature
    May not work due to anti-scraping measures
    For educational purposes only

📍 Route: Paris Gare de Lyon → Marseille Saint-Charles
📅 Date: 2025-11-17

─────────────────────────────────
Attempting to fetch prices...
─────────────────────────────────

❌ Price check failed: Access forbidden - anti-scraping measures detected

This feature is experimental and may not work.
For real pricing, please visit:
- SNCF Connect: https://www.sncf-connect.com
- Or use commercial API providers

Why This Probably Won't Work:

• SNCF employs anti-scraping measures (403 Forbidden)
• Requires reverse-engineering their booking API
• API structure is proprietary and undocumented
• May violate Terms of Service

Recommended Alternatives for Production:

• Lyko SNCF Connect API - Commercial provider
• Trainline API - Multi-operator booking
• Official SNCF partnership programs

See sncf_scraper/README.md for technical details and ethical considerations.

🏗️ Architecture

sncf_mcp_server/
├── server.py              # FastMCP server implementation
├── price_checker.py       # Price scraping wrapper (experimental)
├── pyproject.toml         # Dependencies & project config
├── .env                   # API key (not committed)
├── .gitignore             # Git ignore rules
├── README.md              # This file
├── test_notebook.ipynb    # Jupyter notebook for testing
├── sncf_scraper/          # Price scraper module (experimental)
│   ├── __init__.py          # Module exports
│   ├── models.py            # TrainOffer, PriceSearchResult models
│   ├── scraper.py           # SNCFPriceScraper implementation
│   └── README.md            # Scraper documentation & disclaimers
└── tests/                 # Test suite
    ├── test_simple.py         # Simple train search test
    ├── test_pagination.py     # Pagination feature test
    ├── test_search.py         # MCP wrapper test
    ├── test_price_scraper.py  # Price scraper tests (experimental)
    ├── debug_*.py             # Debug/diagnostic scripts
    ├── run_all_tests.py       # Test runner
    └── README.md              # Test documentation

How It Works

1. Station Search: Queries Navitia API's /places endpoint with fuzzy matching
2. Journey Planning: Uses /journeys endpoint with origin, destination, and datetime
3. Date Parsing: Flexible parser handles multiple date/time formats
4. Response Formatting: Returns human-readable journey information with:
   • Departure and arrival times
   • Journey duration
   • Number of transfers
   • Route details for multi-leg journeys

Key Implementation Details

• ✅ Real-time data (no local database needed)
• ✅ Flexible date parsing with python-dateutil
• ✅ European date format support (day-first parsing)
• ✅ Automatic station ID resolution from city names
• ✅ Shows top 3 station matches for transparency
• ✅ Handles both domestic and international routes
• ✅ Transfer information with route breakdown
• ✅ Pagination support - Returns 10 results per page (up to 100 journeys)
• ✅ Comprehensive test suite - See tests/README.md

🌍 Supported Routes

The server supports any route in the SNCF/Navitia network:

• High-Speed (TGV): Paris-Lyon, Paris-Marseille, Paris-Bordeaux, Paris-Strasbourg
• International: Paris-London (Eurostar), Paris-Munich, Paris-Barcelona, Paris-Brussels
• Long-Distance (Intercités): Regional connections across France
• TER (Regional Express): Local services
• Cross-border: Connections to Germany, Italy, Spain, Switzerland, Belgium

Major Cities:

• Paris (multiple stations: Gare du Nord, Gare de Lyon, Montparnasse, Est, Austerlitz, Saint-Lazare, Bercy)
• Lyon, Marseille, Bordeaux, Toulouse
• Strasbourg, Nantes, Nice, Lille
• International: London, Munich, Barcelona, Brussels, Geneva, Milan
• 1000+ stations across France and Europe!

Use find_station to discover available stations in any city.

🔧 Development

Project Setup

# Clone and install
git clone https://github.com/belgrano9/sncf_mcp_server.git
cd sncf_mcp_server
uv sync

# Set up your API key in .env
echo "SNCF_API=your-api-key-here" > .env

# Run the server
uv run server.py

# Or use FastMCP dev mode
fastmcp dev server.py

Dependencies

• fastmcp - MCP server framework
• requests (>=2.32.5) - HTTP client for API calls
• python-dotenv (>=1.2.1) - Environment variable management
• python-dateutil - Flexible date/time parsing
• httpx (>=0.28.1) - Async HTTP client
• loguru (>=0.7.3) - Logging
• rich (>=14.2.0) - Terminal formatting

File Structure

• server.py - Main MCP server with search_trains and find_station tools
• .env - API key configuration (never commit!)
• test_notebook.ipynb - Interactive testing notebook
• tests/ - Test suite (see tests/README.md)

Testing

Run the test suite to verify everything works:

# Run all tests
uv run tests/run_all_tests.py

# Run individual tests
uv run tests/test_simple.py       # Simple train search
uv run tests/test_pagination.py   # Pagination feature
uv run tests/debug_env2.py         # Environment check

See tests/README.md for detailed test documentation.

📝 Data Source

Real-time data from SNCF Navitia API:

• API Base URL: https://api.sncf.com/v1
• Authentication: HTTP Basic Auth (API key as username)
• Coverage: SNCF network across France and international connections
• Update Frequency: Real-time (no manual updates needed)
• Format: JSON responses
• Documentation: Navitia API Docs

Getting an API Key

1. Visit SNCF Digital
2. Create an account
3. Request access to the Navitia API
4. Copy your API key to .env

🐛 Known Issues

• Windows console may show encoding errors with Unicode characters (functionality not affected)
• Station name matching uses first result - use find_station for ambiguous names
• International routes may have limited availability depending on API coverage

🤝 Contributing

Contributions welcome! Please:

1. Fork the repository
2. Create a feature branch (git checkout -b feature/amazing-feature)
3. Commit your changes (git commit -m 'Add amazing feature')
4. Push to the branch (git push origin feature/amazing-feature)
5. Open a Pull Request

Ideas for Contributions

• Add price information (if available in API)
• Support for train status/real-time delays
• Multi-leg journey optimization
• Visualization of routes on maps
• Additional query filters (train type, max transfers, etc.)
• Support for round-trip queries
• Save favorite routes

📄 License

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

🙏 Acknowledgments

• SNCF for providing the Navitia open API
• FastMCP by @jlowin for the excellent MCP framework
• Anthropic for Claude and the Model Context Protocol
• Navitia for powering the transit data API

📮 Support

• Issues: GitHub Issues
• API Documentation: Navitia API Docs
• MCP Docs: Model Context Protocol

🔗 Related Projects

• Renfe MCP Server - Similar server for Spanish railways
• FastMCP - The framework powering this server
• MCP Servers - Official MCP server implementations

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Built with ❤️ using FastMCP and Claude

Voyagez intelligent, voyagez en train! 🚄