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io.github.christerso/celestial-node

Official registry Maps, travel and weather

Real-time space data — ISS tracking, rocket launches, space news, Mars weather, and more

Source code Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package celestialnode-mcp
Claude Code 
claude mcp add celestial-node -e 'CELESTIAL_NODE_API_KEY=<CELESTIAL_NODE_API_KEY>' -- npx -y celestialnode-mcp@1.1.0
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "celestial-node": {
            "command": "npx",
            "args": [
                "-y",
                "celestialnode-mcp@1.1.0"
            ],
            "env": {
                "CELESTIAL_NODE_API_KEY": "<CELESTIAL_NODE_API_KEY>"
            }
        }
    }
}

Environment variables

  • CELESTIAL_NODE_API_KEY Optional API key for higher rate limits (100/day vs 25/hr). Get yours at https://celestialnode.com/register

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. Celestial Node MCP
  2. About Celestial Node
  3. Quick Start
  4. Rate Limits
  5. Tools
  6. Data Sources
  7. Security
  8. License

Celestial Node MCP

An MCP server for real-time space data from Celestial Node.

Gives AI assistants access to 18 read-only tools covering ISS/Tiangong tracking, crew in space, rocket launches, space news, Mars missions, a 1M+ star catalog, near-Earth asteroids, satellites, and more.

About Celestial Node

Celestial Node is a comprehensive space data platform that aggregates real-time information from space agencies worldwide. It offers:

  • Space Station Tracking - Real-time positions of the ISS and Tiangong space station
  • Crew Information - Current astronauts, cosmonauts, and taikonauts in orbit
  • Rocket Launches - Upcoming launches from providers worldwide
  • Space News - Curated news from NASA, ESA, CNSA, JAXA, Roscosmos, and ISRO
  • Mars Missions - All 18 Mars missions with instruments and discoveries
  • Mars Weather - Surface conditions including temperature, pressure, and wind
  • Star Catalog - 1M+ stars from the ESA Gaia mission
  • Near-Earth Objects - Asteroid tracking and close approaches
  • Satellites - Search and track satellites with re-entry predictions
  • Space Encyclopedia - Comprehensive database of spacecraft, missions, and engines

Quick Start

Without API Key

Anonymous usage is limited to 25 requests per hour.

Claude Desktop

Add to ~/.config/claude/claude_desktop_config.json:

{
  "mcpServers": {
    "celestial-node": {
      "command": "npx",
      "args": ["-y", "celestialnode-mcp"]
    }
  }
}

Claude Code

claude mcp add celestial-node -- npx -y celestialnode-mcp
With API Key

Register at celestialnode.com/register for higher rate limits.

Claude Desktop

{
  "mcpServers": {
    "celestial-node": {
      "command": "npx",
      "args": ["-y", "celestialnode-mcp"],
      "env": {
        "CELESTIAL_NODE_API_KEY": "your-api-key-here"
      }
    }
  }
}

Claude Code

claude mcp add celestial-node --env CELESTIAL_NODE_API_KEY=your-api-key-here -- npx -y celestialnode-mcp

Rate Limits

TierLimitAuthentication
Anonymous25 requests/hourNone
Registered (free)100 requests/dayAPI key
Paid500 requests/dayAPI key

Register for a free API key at celestialnode.com/register.

Tools

ToolDescription
get_iss_positionReal-time ISS position (lat, lon, altitude, velocity)
get_tiangong_positionReal-time Tiangong station position
get_crew_in_spaceAstronauts/cosmonauts/taikonauts currently in orbit
get_upcoming_launchesUpcoming rocket launches worldwide
get_space_newsCurated space news from NASA, ESA, CNSA, JAXA, Roscosmos, ISRO
get_mars_missionsAll 18 Mars missions with instruments and discoveries
get_mars_roversMars rovers with instruments, discoveries, and status
get_mars_weatherMars surface weather (temperature, pressure, wind)
search_starsSearch 1M+ stars from ESA Gaia catalog
get_star_detailsFull astronomical data for a star by Gaia source ID
get_constellationsAll 88 IAU constellations
get_near_earth_objectsUpcoming asteroid close approaches
get_hazardous_asteroidsPotentially hazardous asteroids with orbital data
get_space_agenciesSpace agencies worldwide
search_encyclopediaSearch space encyclopedia (spacecraft, missions, engines)
get_satellite_categoriesSatellite categories with counts
search_satellitesSearch tracked satellites by name
get_upcoming_reentriesPredicted satellite/rocket stage re-entries

Data Sources

All data is served from celestialnode.com which aggregates from NASA, ESA, CNSA, JAXA, Roscosmos, ISRO, SpaceX, and other global space agencies. Data is updated in real-time by background workers.

Security

All 18 tools are read-only GET requests. No write operations, no user data access.

License

MIT

Frequently asked questions

What is io.github.christerso/celestial-node?

Real-time space data — ISS tracking, rocket launches, space news, Mars weather, and more

How do I install io.github.christerso/celestial-node?

It runs on your machine. In Claude Code: claude mcp add celestial-node -e 'CELESTIAL_NODE_API_KEY=<CELESTIAL_NODE_API_KEY>' -- npx -y celestialnode-mcp@1.1.0. For other clients, paste the JSON configuration from this page into their MCP settings.

Does io.github.christerso/celestial-node need an API key?

Its registry entry lists no required key or secret. Some features may still need an account with the service it connects to.

Is io.github.christerso/celestial-node open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains io.github.christerso/celestial-node?

It is published by christerso. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.