mcp-server-ascom 0.2.3

MCP server for ASCOM astronomy equipment control

MCP Server for ASCOM

Control astronomy equipment through AI. MCP 2025-06-18 compliant.

Features

• Latest Protocol - Structured outputs. Version negotiation.
• Any ASCOM Device - Telescopes. Cameras. Focusers. More.
• Natural Language - "Point at M31" just works.
• Auto-Discovery - Finds devices. No configuration.
• Fast - Async everywhere. Never blocks.
• Secure - OAuth ready. Off by default.
• Extensible - Add new device types easily.
• Tested - Full coverage. Type safe.

Installation

Option 1: pip install (Simplest)

pip install mcp-server-ascom

Option 2: uvx (No install needed)

uvx mcp-server-ascom

Option 3: From source

git clone https://github.com/stellarpunk/mcp-server-ascom.git
cd mcp-server-ascom
pip install -e .

Note: The alpyca package (ASCOM library) imports as alpaca in Python code.

Configuration

Claude Desktop

Quick Setup (Recommended)

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "ascom": {
      "command": "uvx",
      "args": ["mcp-server-ascom"]
    }
  }
}

This uses uvx to automatically handle Python environments and dependencies.

Alternative: Direct Installation

pip install mcp-server-ascom

Then use:

{
  "mcpServers": {
    "ascom": {
      "command": "mcp-server-ascom"
    }
  }
}

Running the Server

# Make sure virtual environment is activated
source .venv/bin/activate

# Run the server
python -m ascom_mcp

MCP Inspector (Testing)

npm install -g @modelcontextprotocol/inspector

# With virtual environment
mcp-inspector .venv/bin/python -m ascom_mcp

# Or if mcp-server-ascom is in PATH
mcp-inspector mcp-server-ascom

Usage

You: Connect to my telescope
AI: Found Seestar S50. Connected.

You: Point at the Orion Nebula
AI: Slewing to M42... Done.

Supported Equipment

ASCOM Alpaca devices: Telescopes. Cameras. Focusers. Filter wheels. Domes.

Tools

Find devices: discover_ascom_devices
Control telescope: connect goto goto_object park
Use camera: connect capture get_status

Development

Setup

git clone https://github.com/stellarpunk/mcp-server-ascom.git
cd mcp-server-ascom

# Create virtual environment (choose one)
uv venv                    # Using uv
python -m venv .venv       # Using standard venv

# Activate
source .venv/bin/activate  # On Windows: .venv\Scripts\activate

# Install with dev dependencies
pip install -e ".[dev]"    # or: uv pip install -e ".[dev]"

Testing

# Run all tests
pytest

# Run with coverage
pytest --cov=ascom_mcp

# Run specific test file
pytest tests/test_device_manager.py

See CONTRIBUTING.md for guidelines.

Security

Off by default. Enable OAuth:

cp .env.example .env
# Edit .env: ASCOM_MCP_OAUTH_ENABLED=true
# Restart server

Done. See security.py for options.

Troubleshooting

ModuleNotFoundError: No module named 'alpyca'

The alpyca package installs as alpaca. Use:

from alpaca import discovery  # NOT from alpyca

Virtual Environment Issues

Always activate your virtual environment before running:

source .venv/bin/activate  # Linux/macOS
.venv\Scripts\activate     # Windows

No ASCOM devices found

1. Ensure devices are powered on and connected to network
2. Check firewall settings (UDP port 32227 for discovery)
3. Try manual discovery at known IP:

   curl http://device-ip:11111/api/v1/description
   

License

MIT - see LICENSE

See Also

• Seestar S50 Integration Guide
• ASCOM Standards
• Alpaca API Reference