Astronomy MCP Server: Install & Setup

Install Astronomy in Claude Code

Remote URL

Claude Code

claude mcp add --transport http astronomy https://astronomy.caseyjhand.com/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "astronomy": {
      "url": "https://astronomy.caseyjhand.com/mcp"
    }
  }
}

npm

Claude Code

claude mcp add astronomy -- npx -y @cyanheads/astronomy-mcp-server

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "astronomy": {
      "command": "npx",
      "args": [
        "-y",
        "@cyanheads/astronomy-mcp-server"
      ]
    }
  }
}

Frequently asked questions

What does the Astronomy MCP server do?

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

Is the Astronomy MCP server free?

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Does Astronomy run locally or remotely?

Local + Remote. Can run locally or be used as a hosted remote server.

How do I add Astronomy to Claude Code?

Run: claude mcp add --transport http astronomy https://astronomy.caseyjhand.com/mcp

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