About CycleCalcs Astronomy
Read-only astronomy calculations: sun, moon, planets, eclipses, twilight and star positions.
Configuration
Remote servers need no local install. Pick your client, then copy the config or install in one click.
https://www.cyclecalcs.com/mcpclaude mcp add --transport http com-cyclecalcs-astronomy https://www.cyclecalcs.com/mcp{"mcpServers":{"com-cyclecalcs-astronomy":{"type":"http","url":"https://www.cyclecalcs.com/mcp"}}}Open in Cursor{"servers":{"com-cyclecalcs-astronomy":{"type":"http","url":"https://www.cyclecalcs.com/mcp"}}}Open in VS Code{"mcpServers":{"com-cyclecalcs-astronomy":{"type":"http","url":"https://www.cyclecalcs.com/mcp"}}}{"mcpServers":{"com-cyclecalcs-astronomy":{"serverUrl":"https://www.cyclecalcs.com/mcp"}}}Run commands in a terminal; paste JSON into the client’s MCP config and restart. Servers that need sign-in will prompt on first connect.
https://www.cyclecalcs.com/mcpAuth requiredTools
11| Parameter | Type | Required | Description |
|---|---|---|---|
| tz | string | No | IANA timezone like "Europe/Lisbon" to render event times in local time. Optional; a resolved place supplies its own timezone. |
| lat | number | No | Latitude in decimal degrees, north positive. Send lat and lon together. |
| lon | number | No | Longitude in decimal degrees, east positive (Lisbon is about -9.14). Send lat and lon together. |
| date | string | No | ISO 8601 UTC date or datetime, e.g. "2026-08-06" or "2026-08-06T21:00:00Z". Or jd: followed by a Julian Day on the UT scale, e.g. "jd:2461000.5". On astro_positions, date may list up to 24 datetimes separated by commas, answered in the order sent. Omit for the current moment. Years 1700 to 2200 only; outside that range the API refuses with DATE_OUT_OF_RANGE because the ephemeris is not reliable there. |
| place | string | No | Place name instead of lat/lon, as "City" or "City,CC" with an ISO country code, e.g. "Lisbon,PT". Resolved server-side; the response then carries a required GeoNames CC BY 4.0 credit in its attribution field, which must be preserved when shown. |
Details
The maintainer has not added details yet. Check the README in the repository.
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