Astronomy MCP Server

by mrfentmen Your server? Claim it

local only

Astronomy MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 544 installs a week from npm. Last commit 2 Nov 2026.

Solar and lunar almanac offline: sunrise, sunset, twilight, sun position and moon phase

Installs per day peak 511 · avg 18

a month agotoday

544

Installs / week

npm · @mrfentmen/astronomy-mcp

Stars

0 open issues

2 Nov 2026

Last commit

3 releases in 90 days

—

License

TypeScript

Nothing serious here today

Today is the operative word: we check Astronomy MCP every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.

Connect this server

This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add astronomy-mcp -- npx -y @mrfentmen/astronomy-mcp

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

{
  "mcpServers": {
    "astronomy-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@mrfentmen/astronomy-mcp"
      ]
    }
  }
}

~/.codex/config.toml

[mcp_servers.astronomy-mcp]
command = "npx"
args = ["-y", "@mrfentmen/astronomy-mcp"]

.cursor/mcp.json

{
  "mcpServers": {
    "astronomy-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@mrfentmen/astronomy-mcp"
      ]
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "astronomy-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@mrfentmen/astronomy-mcp"
      ]
    }
  }
}

Alternatives to Astronomy MCP

same job, measured the same way

Astronomy MCP Server

by cyanheads

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

719 installs/wk 7 tools answering

Usno MCP

by mrfentmen

Sun rise and set, moon phases, twilight times and the seasons from the US Naval Observatory.

465 installs/wk local only

Thirdtrail

by thirdtrail

Elevation-corrected sun, moon, twilight, solar and tide data for any point on Earth

8 tools answering

Sunrise Sunset MCP

by mrfentmen

Sunrise, sunset, and twilight times for any location. No key required.

55 installs/wk local only

Sunrise & Sunset Times

by sunrise-sunset

Sunrise, sunset, twilight, golden hour and moon times for any place on Earth. Free, no API key.

2 tools answering

CycleCalcs Astronomy

by cyclecalcs

Read-only astronomy calculations: sun, moon, planets, eclipses, twilight and star positions.

12 tools answering

Earth & Sky

by sslip-13-62-217-51

Live earthquakes, ISS position, weather, moon phase, and true star visibility. No key.

9 tools answering

bazi-chart

by liyooh007

Chinese BaZi Four Pillars engine: precise solar terms, true-solar-time, lunar, patterns, offline.

398 installs/wk local only

Astronomy MCP — questions

Answers built from our own checks of this server.

Why is there no uptime for Astronomy MCP?

Astronomy MCP runs on your own machine over stdio — there is no network address to reach, so uptime cannot be measured for it by anyone. What can be measured is adoption: the npm package @mrfentmen/astronomy-mcp was installed 544 times last week.

How do I connect Astronomy MCP?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It runs locally, so the command pulls @mrfentmen/astronomy-mcp straight from npm; nothing to host, nothing to sign up for.

How many people use Astronomy MCP?

The npm package @mrfentmen/astronomy-mcp was installed 544 times in the last week. We show installs rather than GitHub stars on purpose: a star is a bookmark, an install is someone actually running it.

Is Astronomy MCP open source?

We cannot say either way: written in TypeScript and 0 stars on GitHub, but we could not determine the licence, and without one the code is not open source by default.