How do I install astronomy-mcp-server?

Pick a client above and copy the generated config. Cursor and VS Code also have a deep link when the server can run locally or remotely.

Is astronomy-mcp-server official?

No. Registry-listed is not the same as vendor-official. Read the methodology for the difference.

How is the trust score calculated?

This listing scores 37 (Limited). The formula is published on the methodology page.

MCPpedia

astronomy-mcp-server MCP Server | MCPpedia

astronomy-mcp-server MCP Server

Name: astronomy-mcp-server MCP Server
Author: cyanheads

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

Tools Versions Alternatives

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37Limited

Install

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "cyanheads-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": ""
      }
    }
  }
}

Install guide

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Environment

Name	Required	Notes
MCP_LOG_LEVEL	No	Sets the minimum log level for output (e.g., 'debug', 'info', 'warn').
ASTRONOMY_ENABLE_HORIZONS	No	Register the astronomy_get_ephemeris tool, which fetches small-body and spacecraft ephemerides from JPL Horizons. Off by default; the core is keyless and offline.
ASTRONOMY_ENABLE_SATELLITES	No	Register the astronomy_get_satellite_passes tool, which predicts visible satellite passes from CelesTrak GP element sets propagated with SGP4. Off by default.
ASTRONOMY_DEFAULT_TIMEZONE	No	Fallback IANA timezone for observer-local output when a tool call omits `timezone`. Unset means UTC-only output.
MCP_TRANSPORT_TYPE	No	Selects the HTTP transport.
MCP_HTTP_HOST	No	The hostname for the HTTP server.
MCP_HTTP_PORT	No	The port to run the HTTP server on.
MCP_HTTP_ENDPOINT_PATH	No	The endpoint path for the MCP server.
MCP_AUTH_MODE	No	Authentication mode to use: 'none', 'jwt', or 'oauth'.
MCP_LOG_LEVEL	No	Sets the minimum log level for output (e.g., 'debug', 'info', 'warn').
ASTRONOMY_ENABLE_HORIZONS	No	Register the astronomy_get_ephemeris tool, which fetches small-body and spacecraft ephemerides from JPL Horizons. Off by default; the core is keyless and offline.
ASTRONOMY_ENABLE_SATELLITES	No	Register the astronomy_get_satellite_passes tool, which predicts visible satellite passes from CelesTrak GP element sets propagated with SGP4. Off by default.
ASTRONOMY_DEFAULT_TIMEZONE	No	Fallback IANA timezone for observer-local output when a tool call omits `timezone`. Unset means UTC-only output.

astronomy-mcp-server MCP Server

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