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io.github.cyanheads/astronomy-mcp-server

Offline observational astronomy: positions, rise/set, moon phases, eclipses, and seasons.

Install

Add the config to your client settings. Replace values in <angle brackets> with your own.

claude_desktop_config.json

{
  "mcpServers": {
    "astronomy-mcp-server": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/astronomy-mcp-server@0.4.2"
      ],
      "env": {
        "MCP_LOG_LEVEL": "info",
        "ASTRONOMY_ENABLE_HORIZONS": "false",
        "ASTRONOMY_ENABLE_SATELLITES": "false",
        "ASTRONOMY_DEFAULT_TIMEZONE": "<ASTRONOMY_DEFAULT_TIMEZONE>"
      }
    }
  }
}

Details

Name: io.github.cyanheads/astronomy-mcp-server
Version: 0.4.2
Updated: Oct 15, 2026
Source: Official MCP Registry
Repository: https://github.com/cyanheads/astronomy-mcp-server