Astronomy MCP server
online · 100% uptimeOffline observational astronomy: positions, rise/set, moon phases, eclipses, and seasons.
not scanned yet
3 stars696 downloads/wk
Reviews
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If you have run it, two minutes of your experience saves the next person an afternoon.
Astronomy tools
Tool list not cached yet. `describe` through the gateway fetches it live.
How Astronomy compares
Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.
- Safety score
- 93/100
- higher than 96% of 48,255 servers
- Uptime
- 100%
- of our recent checks; the typical remote server answers 100%
- Response time
- 229 ms
- faster than 59% of 30,031 servers
- GitHub stars
- 3
- more than 80% of 28,688 servers
- Downloads a week
- 696
- more than 91% of 12,191 servers with a package
Release history: 7 versions in the registry since 2026-08-25, latest 2026-10-28, typically one every 9 days.
Install Astronomy in Claude Code, Cursor or VS Code
claude mcp add --transport http astronomy-mcp-server https://astronomy.caseyjhand.com/mcp
What the publisher says
From the Astronomy repository's README, as published. We do not edit it. Read it on GitHub
@cyanheads/astronomy-mcp-server What's in the sky, computed offline — planet and moon positions, rise/set, phases, eclipses, and seasons for any place and time via MCP. STDIO or Streamable HTTP. 7 Tools • 1 Resource • 1 Prompt
Public Hosted Server: https://astronomy.caseyjhand.com/mcp
Overview
Observational astronomy computed in-process from astronomy-engine — sky positions, rise/set and twilight times, moon phases, and eclipse/conjunction/opposition events for any place and time, plus two optional network-backed extensions for small-body ephemerides and satellite passes. List what's visible right now, plan a dark-sky window, or search forward for the next sky event — deterministic and keyless for the five core tools, given the same body, time, and observer. Runs as a stdio process, a local Streamable HTTP server, or the public hosted endpoint above.
Tools
Shortened. The full README is on GitHub.
Nothing above is checked by us. What we check is on the safety report.
Astronomy: common questions
- Is Astronomy MCP server safe?
- Yes, by our scan: it is graded A (93/100). Read the Astronomy safety report
- How do I install Astronomy?
- It runs remotely at astronomy.caseyjhand.com. Add it to Claude Code, Cursor, VS Code or Claude Desktop with the snippets above, or call it through the mcp.market gateway without installing anything.
- Does Astronomy need an API key?
- No secret keys are declared. It reads 13 settings from the environment.
- Is Astronomy maintained?
- The last commit was 27 days ago (2026-10-08). The latest release is v0.5.0.
- Is Astronomy up?
- 100% of our last 28 checks got an answer. We check remote servers about four times a day.
- How does Astronomy compare with other MCP servers?
- safety score 93/100 (higher than 96% of 48,255 servers); uptime 100% (of our recent checks; the typical remote server answers 100%); response time 229 ms (faster than 59% of 30,031 servers). Full comparison.