Perigee

Name: Perigee
Author: dlamarre-dev

by dlamarre-devversion 1.9.5i★ –iComputer or cloud

Registry nameio.github.dlamarre-dev/perigee

Install

Overview

Description from the maker (original English)

Positions, distances, mission facts and 3D views of objects orbiting the Earth, Moon, Mars and Sun.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Computer or cloud
Transport: stdio, Streamable HTTP
Category: Design, images & audio

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
You fill in yourself: PERIGEE_SITE, PERIGEE_MCP_CACHE

You need

Runs in the cloudNothing to install; it connects over the internet
npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://perigee-mcp.perigeeinfo.workers.dev/mcp

Or run it on your computer

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "perigee": {
      "command": "npx",
      "args": [
        "-y",
        "perigee-mcp"
      ],
      "env": {
        "PERIGEE_SITE": "your-value",
        "PERIGEE_MCP_CACHE": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add --transport http perigee https://perigee-mcp.perigeeinfo.workers.dev/mcp

Or run it on your computer

claude mcp add perigee --env PERIGEE_SITE=your-value --env PERIGEE_MCP_CACHE=your-value -- npx -y perigee-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "perigee": {
      "url": "https://perigee-mcp.perigeeinfo.workers.dev/mcp"
    }
  }
}

Or run it on your computer

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "perigee": {
      "command": "npx",
      "args": [
        "-y",
        "perigee-mcp"
      ],
      "env": {
        "PERIGEE_SITE": "your-value",
        "PERIGEE_MCP_CACHE": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "perigee": {
      "type": "http",
      "url": "https://perigee-mcp.perigeeinfo.workers.dev/mcp"
    }
  }
}

Or run it on your computer

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "perigee": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "perigee-mcp"
      ],
      "env": {
        "PERIGEE_SITE": "your-value",
        "PERIGEE_MCP_CACHE": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://perigee-mcp.perigeeinfo.workers.dev/mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

PERIGEE_SITE env
Base URL of the Perigee site to query (default: https://perigee.info/)
PERIGEE_MCP_CACHE env
Directory for the on-disk cache (default: OS user cache directory)

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account dlamarre-dev, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Design, images & audioi

More stars than 0% of the other 2169 servers in this category
Published to the registry more recently than 84% of the other 2169 servers in this category
Basic checks equal to or better than 100% of the other 2169 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Perigee safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

Either way works: install it on your computer or connect to the cloud version.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.9.5) reached the registry 6 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Figma Context MCP, Claude Real Video, Figma MCP Server

Alternatives

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Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

perigee-mcp

An MCP server for Perigee, the open-source 3D viewer of the artificial objects orbiting the Earth, the Moon and Mars and of the spacecraft crossing the solar system. It lets an AI assistant (a teaching assistant, for example) answer questions such as “how far is Mars from the Earth on 1 December 2026?”, “where is the ISS now?” or “what is Lucy's mission?”, and hand the student a live 3D view, with how each number was obtained, from which data, how fresh and how accurate.

Educational use only: not for navigation, collision avoidance or conjunction assessment.

Use it

Claude Desktop (claude_desktop_config.json) or any MCP client that starts servers over stdio:

"mcpServers": { "perigee": { "command": "npx", "args": ["-y", "perigee-mcp"] } } }

Claude Code: claude mcp add perigee -- npx -y perigee-mcp. Node.js 20 or later.

Hosted, nothing to install: the same tools at https://perigee-mcp.perigeeinfo.workers.dev/mcp (Streamable HTTP, no account, a budget of 60 units a minute per address, a tool call costing 1 to 4). Claude.ai: Settings → Connectors → Add custom connector with that URL; Claude Code: claude mcp add --transport http perigee https://perigee-mcp.perigeeinfo.workers.dev/mcp. Distance series are limited to 100 samples, pass searches to 3 days and event searches to 31 days there. The hosted endpoint keeps a short usage log (tool, object asked about, outcome; never your address or place coordinates; see the privacy page).

Tools

Tool	What it returns
`perigee_find`	Ids of objects matching a name (English or French): planets, moons, missions, any active Earth satellite (name, NORAD or COSPAR id), sites, stars, comets, asteroids
`perigee_object`	Facts: agency, country, launch, status, mission goals, identifiers, official website, sources and verification date, image with credit and licence
`perigee_state`	Position and velocity at a date relative to a centre, distance, altitude, speed, light time, sunlight; the ground point below (country or sea on the Earth)
`perigee_orbit`	Perigee and apogee altitudes, period, inclination, eccentricity; regime (LEO, MEO, GEO, HEO) for Earth satellites
`perigee_passes`	When an Earth satellite passes over a place: rise, highest point and set with direction and elevation, naked-eye visibility, local times
`perigee_sky`	The sky from a place at a date: day, twilight or night, the Sun and its next rise and set, the Moon's phase, the planets and bright stars with direction, brightness and naked-eye visibility
`perigee_events`	Moon phases (super and micro full Moons), eclipses (also as seen from a place), equinoxes, solstices, perihelion, planet oppositions, conjunctions and elongations, mission milestones
`perigee_tonight`	What to see tonight from a place: the night's start and end, the Moon, the planets visible to the naked eye, the visible passes of the ISS, Tiangong and Hubble, close pairings and events, with short highlights
`perigee_sky_conjunctions`	Close pairings in the sky from a place: the Moon and planets with each other and with bright stars near the ecliptic, or a satellite passing near them
`perigee_shadow`	Whether an object is in sunlight, penumbra or umbra of the body it orbits, and when it next enters or leaves the shadow
`perigee_ground_track`	The path on the ground below an Earth satellite over one or two orbits: points and a GeoJSON line split at the antimeridian
`perigee_close_approach`	The closest distance between two objects in space over a period, timed precisely, with the relative speed of two satellites (education only, never collision avoidance)
`perigee_stats`	Counts of active satellites by owner, operator, constellation, orbit regime, object type, launch year and altitude band
`perigee_distance`	Distance between two objects at a date (km, au) and light time
`perigee_distance_series`	Distances over a period, with the closest and farthest samples
`perigee_view`	Link to the 3D view, and an of the live view for a lesson page (the page can drive it and take PNG snapshots with the `perigee:v1` messages); for a star, its 3D map with the Sun (`star_map`, `compare`)
`perigee_describe_view`	A Perigee link or embed in words: one-sentence alternative text and a description for lesson notes (view, object and reliability of its position, date, speed of time, frame, filters)
`perigee_define`	Student-level definitions (EN/FR) of apogee, inclination, NORAD number, ephemeris window…
`perigee_about`	Data sources and fetch times, models and their typical accuracy, attribution

Every computed answer has a provenance list: the model (SGP4 from CelesTrak GP or supplemental GP elements, Hermite interpolation of JPL Horizons vectors, two-body extrapolation, VSOP87 for planets, analytical or mean-element moons), the data state (fresh, interpolated, stale, extrapolated, hidden, modelled, none), when the data were fetched, the age of the orbital elements, the ephemeris window, and a typical accuracy with its basis.

Data

Positions are computed on your machine with the same code as the web app, from the data Perigee publishes at https://perigee.info/data/ (CelesTrak elements refreshed every 4 hours, JPL Horizons ephemerides daily). Each dataset version is downloaded once and kept in a cache (%LOCALAPPDATA%\perigee-mcp, ~/Library/Caches/perigee-mcp or ~/.cache/perigee-mcp; PERIGEE_MCP_CACHE overrides it). The server never contacts CelesTrak or Horizons. PERIGEE_SITE points it to another Perigee deployment.

Credits: CelesTrak (T.S. Kelso) / 18th & 19th SDS via Space-Track, NASA/JPL-Caltech Horizons, astronomy-engine (MIT), satellite.js (MIT); catalogue images under the licence given with each. Code: MIT, https://github.com/dlamarre-dev/Perigee.

Perigee

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Or run it on your computer

Or run it on your computer

Or run it on your computer

Or run it on your computer

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Design, images & audioi

Common questions

Alternatives

Figma Context MCP

Claude Real Video

Figma MCP Server

README from the maker

perigee-mcp

Use it

Tools

Data