Ephemeris MCP Server: Install & Setup

Install Ephemeris in Claude Code

Claude Code

claude mcp add ephemeris -- npx -y @cosmosos/mcp-ephemeris

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

{
  "mcpServers": {
    "ephemeris": {
      "command": "npx",
      "args": [
        "-y",
        "@cosmosos/mcp-ephemeris"
      ]
    }
  }
}

NASA-validated computed planetary positions for your AI: 19 astrology tools, never hallucinated.

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

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

Run: claude mcp add ephemeris -- npx -y @cosmosos/mcp-ephemeris

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