Offline observational astronomy: positions, rise/set, moon phases, eclipses, and seasons.
Astronomy-mcp-server is an MCP integration. Offline observational astronomy: positions, rise/set, moon phases, eclipses, and seasons.
The registry lists a streamable-http connection at https://astronomy.caseyjhand.com/mcp.
The published npm package is @cyanheads/astronomy-mcp-server, version 0.4.1. Its declared MCP transport is stdio.
The package declares MCP_LOG_LEVEL: Sets the minimum log level for output (e.g., 'debug', 'info', 'warn').; ASTRONOMY_ENABLE_HORIZONS: 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: 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: Fallback IANA timezone for observer-local output when a tool call omits timezone. Unset means UTC-only output..
The published npm package is @cyanheads/astronomy-mcp-server, version 0.4.1. Its declared MCP transport is streamable-http.
The package declares MCP_TRANSPORT_TYPE: Selects the HTTP transport.; MCP_HTTP_HOST: The hostname for the HTTP server.; MCP_HTTP_PORT: The port to run the HTTP server on.; MCP_HTTP_ENDPOINT_PATH: The endpoint path for the MCP server.; MCP_AUTH_MODE: Authentication mode to use: 'none', 'jwt', or 'oauth'.; MCP_LOG_LEVEL: Sets the minimum log level for output (e.g., 'debug', 'info', 'warn').; ASTRONOMY_ENABLE_HORIZONS: 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: 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: Fallback IANA timezone for observer-local output when a tool call omits timezone. Unset means UTC-only output..
Check the maintainer’s instructions for account access, authentication and the supported client configuration. Once connected, inspect the tools your client receives and try a small task that matches the server’s stated purpose. The registry description does not include a verified, complete tool list.
View the publisher’s registry entry · Project repository. This profile uses version 0.4.1 from the registry. Registration identifies the publisher namespace; it does not establish that this is a first-party integration for every service it connects.
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| Variable | Description | Required |
|---|---|---|
| MCP_LOG_LEVEL | Sets the minimum log level for output (e.g., 'debug', 'info', 'warn'). | Check documentation |
| ASTRONOMY_ENABLE_HORIZONS | 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. | Check documentation |
| ASTRONOMY_ENABLE_SATELLITES | Register the astronomy_get_satellite_passes tool, which predicts visible satellite passes from CelesTrak GP element sets propagated with SGP4. Off by default. | Check documentation |
| ASTRONOMY_DEFAULT_TIMEZONE | Fallback IANA timezone for observer-local output when a tool call omits timezone. Unset means UTC-only output. | Check documentation |
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