The Astronomy MCP Server MCP server,
connected in one click.
Offline observational astronomy: positions, rise/set, moon phases, eclipses, and seasons. Connect the official Astronomy MCP Server MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.
Free to start · No credit card · No hosting needed
Add Astronomy MCP Server to your AI in one minute
Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.
claude mcp add --transport http astronomy-mcp-server https://astronomy.caseyjhand.com/mcpRun in your terminal, then restart Claude Code.
Astronomy MCP Server · https://astronomy.caseyjhand.com/mcp
What your AI can do with Astronomy MCP Server
Real prompts you can type the moment it's connected — no setup, no docs to read.
“Use “astronomy_get_sky_position”: Compute the apparent topocentric position of one solar-system body (sun, moon, mercury through neptune, pluto) or a named bright star for an.”
“Use “astronomy_get_rise_set”: Compute rise, set, and culmination (transit) times for a body at an observer location, plus the maximum altitude at culmination. For the Sun.”
“Use “astronomy_get_moon_phase”: Report the Moon phase for an instant: illuminated fraction, phase name, synodic age in days since the new moon, phase angle, and the next fo.”
“Use “astronomy_find_events”: Search forward from a start time for the next occurrences of one sky-event class, selected by the `event` enum: solar_eclipse, lunar_eclipse.”
How secure is the Astronomy MCP Server MCP server?
Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how Astronomy MCP Server holds up.
Security grade A
gate scanned 7 tools on Sep 22, 2026 for prompt injection and risky tool definitions — nothing to flag.
- lowastronomy_find_events: Unusually long tool description
- lowastronomy_get_ephemeris: Unusually long tool description
- lowastronomy_get_satellite_passes: Unusually long tool description
Official endpoint
Operated by Astronomy MCP Server (caseyjhand.com) at its documented MCP endpoint — not a third-party mirror or community re-host.
No sign-in needed
This server only exposes public data — no account and no credentials are involved when you connect.
Scanned before it goes live
gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.
Watched for drift
If Astronomy MCP Server adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.
Connected in three steps
Connect your gate
Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.
Pick Astronomy MCP Server
Choose Astronomy MCP Server in the gate directory. No sign-in needed.
Use it anywhere
Astronomy MCP Server's tools are live in every AI client you've connected — with rules and logging built in.
Free to start · No credit card · No hosting needed
The actual tools Astronomy MCP Server exposes
Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.
astronomy_get_sky_position — Compute the apparent topocentric position of one solar-system body (sun, moon, mercury through neptune, pluto) or a named bright star for an
astronomy_get_rise_set — Compute rise, set, and culmination (transit) times for a body at an observer location, plus the maximum altitude at culmination. For the Sun
astronomy_get_moon_phase — Report the Moon phase for an instant: illuminated fraction, phase name, synodic age in days since the new moon, phase angle, and the next fo
astronomy_find_events — Search forward from a start time for the next occurrences of one sky-event class, selected by the `event` enum: solar_eclipse, lunar_eclipse
astronomy_list_visible — The one-call "what is up right now" answer. For an observer location and instant, iterate every naked-eye solar-system body (and, with inclu
astronomy_get_ephemeris — Fetch a time-series ephemeris for a small body (asteroid or comet) or spacecraft from JPL Horizons — RA/Dec, distance, and apparent magnitud
astronomy_get_satellite_passes — Predict visible passes of a satellite (e.g. the ISS, NORAD 25544) over an observer in the next `days`. Identify the satellite by exactly one
Who runs the Astronomy MCP Server MCP server?
The Astronomy MCP Server MCP server at a glance
https://astronomy.caseyjhand.com/mcpQuestions, answered
Is there an official Astronomy MCP Server MCP server?
Yes — Astronomy MCP Server operates its own remote MCP server at astronomy.caseyjhand.com. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.
How do I connect Astronomy MCP Server to Claude or ChatGPT?
Add gate's gateway URL to your AI client once, then pick Astronomy MCP Server in the directory. No account or sign-in is needed. From then on, Astronomy MCP Server's tools are available in every client you've connected to gate.
Do I need to host anything?
No. Astronomy MCP Server runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.
Is the Astronomy MCP Server MCP server safe to connect?
It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.
Is it free?
Yes — you can get started with gate for free and connect Astronomy MCP Server in minutes. No credit card required.
Connect more than just Astronomy MCP Server
Every server below works through the same gateway URL — connect once, add tools anytime.
Squarespace DomainsDesignView →Set up Astronomy MCP Server in: Claude · Claude Code · ChatGPT · Cursor · VS Code
Give your AI Astronomy MCP Server — safely.
One URL. All MCPs. Full control. Free to start.
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