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@interstellar Tools MCP

by @interstellar-tools

Exposes orbital mechanics equations and celestial body datasets to AI assistants through MCP tools.

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Install @interstellar Tools MCP

Pick your client, then add it in one click or paste the config.

STDIONode.js
~/Library/Application Support/Claude/claude_desktop_config.json
claude_desktop_config.json
{
  "mcpServers": {
    "interstellar-tools-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@interstellar-tools/mcp"
      ]
    }
  }
}

Settings → Developer → Edit Config, merge this into mcpServers, then fully quit and reopen Claude Desktop.

Automated check passed— started and listed 29 tools correctly (Today).

Overview

@interstellar-tools/mcp exposes the interstellar-tools orbital mechanics equations and celestial body datasets through the Model Context Protocol. AI assistants can call calculation tools instead of estimating values, with units included in field names. Install it as an npm package and run it through npx for orbital mechanics learning, prototyping, simulation support, or mission-tool development. It belongs in the Aerospace & Astrodynamics category, but is not intended for flight-certified or safety-critical work.

Use cases

  • Calculate orbital speeds and energies during an AI-assisted analysis
  • Build educational orbital mechanics examples with an MCP client
  • Prototype simulator or mission-dashboard calculations
  • Query celestial body data from an AI coding workflow

Key features

  • Orbital mechanics equation tools
  • Celestial body datasets
  • SI-unit-explicit tool fields
  • MCP access through npm and npx
  • Calculations for speed, energy, angular momentum, and apsides

Tools29

What @interstellar Tools MCP lets your agent do. Expand a tool for its parameters.

Verified live~7.5k tokens of context

Security & health

What it can reach and how reliably it runs — from our own checks, not the maintainer’s claims.

ActiveLast checked Today

Recent health check succeeded.

What it can do

From the 29 tools this server returned when we ran it; 29 declare their own safety hints.

Makes network requests · 1Read-only tools · 29
Network at startup3 connections
Files written at startupNone
Install scriptsNone
npm provenanceSigned build
Package age26 days
Maintainers1

Observed 2026-11-11 in an isolated sandbox. A description of reach, not a security audit.

Supply-chain signal

No high-severity advisories surfaced by our automated scan.

Critical 0High 0Medium 0Low 0

Scanned 9h ago via OSV.dev · @interstellar-tools/mcp (npm)

Adoption & maintenance

Factual signals from GitHub, npm, and our automated checks — not a rating.

GitHub stars1Stargazers on the source repository.
npm downloads4.3kPackage downloads in the last 30 days.
Last commitTodayMost recent push to the default branch.
Availability100%Our rolling endpoint + install checks that succeeded.
Install checkPassedOur sandbox started it and listed its tools.
Tools exposed29Callable tools this server registers over MCP.

How @interstellar Tools MCP works

What @interstellar-tools/mcp does

@interstellar-tools/mcp makes selected functionality from the interstellar-tools TypeScript monorepo available to MCP-compatible AI assistants. Its focus is orbital mechanics and related space-software calculations, backed by equation utilities and celestial body data.

The server is useful when an assistant needs to calculate or explain common orbital quantities with explicit units rather than produce an unsupported estimate. Typical users include developers building simulators, visualizations, mission dashboards, educational examples, and other Node or web applications involving spaceflight concepts.

How it works

The package runs as an MCP server and presents the toolkit’s equations and body datasets as callable tools. An MCP client starts the package as a subprocess, allowing an assistant to request calculations during a conversation or workflow.

The underlying toolkit uses SI units. Tool field names spell out their units, which helps distinguish values such as metres, metres per second, and cubic metres per second squared. The exposed equation set covers established orbital-mechanics operations including gravitational parameter calculations, vis-viva speed, Kepler’s third law, escape and circular velocity, specific orbital energy, specific angular momentum, and periapsis or apoapsis radii.

Setup and configuration

Install and launch the server with an MCP client that can run npm packages through npx:

Terminal
claude mcp add interstellar-tools -- npx -y @interstellar-tools/mcp

The project targets Node.js 22.9 or later. The same MCP package can be configured for clients such as Claude, ChatGPT, Mistral Le Chat, Gemini, GitHub Copilot, Cursor, and JetBrains using each client’s MCP setup flow.

No environment variables are required by the documented launch command. The package is distributed through npm under the @interstellar-tools/mcp name.

Tools and capabilities

The server exposes a curated subset of the broader interstellar-tools packages rather than every monorepo feature. Its supported scope includes:

  • Orbital mechanics and dynamics equations.
  • Physical and astronomical body datasets.
  • Unit-explicit inputs and outputs.
  • Calculations involving gravity, orbital speed, orbital energy, angular momentum, and apsides.
  • MCP access for AI-assisted explanations, calculations, and coding workflows.

The broader project also contains packages for time utilities, mapping, tracking, shared types, and constants, but the MCP package is described specifically in terms of selected equations and body datasets.

Limitations and notes

Equation tests use internal reference values, but the project has not been systematically cross-validated against operational flight software or high-fidelity ephemerides. Treat results as suitable for learning, prototyping, and general software tooling rather than mission-critical or flight-certified applications.

The server is not presented as a replacement for high-fidelity astrodynamics systems such as tools that model full gravity fields, Earth orientation, precise ephemerides, or complete planetary N-body dynamics. Its scope is a curated set of reusable orbital calculations and datasets.

Read the full README View source on GitHub

Reviews

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Frequently Asked Questions about @interstellar Tools MCP

@interstellar-tools/mcp is an MCP server that connects AI assistants to interstellar-tools orbital mechanics equations and celestial body datasets. Its main tools expose calculations for gravity, orbital speed, Kepler’s law, escape and circular velocity, specific energy, angular momentum, and periapsis or apoapsis values with units.

Run it through npx with your MCP client, such as `claude mcp add interstellar-tools -- npx -y @interstellar-tools/mcp`. Node.js 22.9 or later is the documented runtime target, and no environment variables are needed for this launch command.

Yes, @interstellar-tools/mcp can be configured for Cursor through its MCP setup flow. The server runs as an npm package over a standard subprocess launch, using `npx -y @interstellar-tools/mcp`.

Yes, it exposes orbital velocity calculations including vis-viva speed, escape velocity, and circular velocity. Inputs and outputs use SI units, with units spelled out in tool field names.

No, it is intended for learning, prototyping, and general space-software tooling rather than flight-certified or safety-critical use. Its equations are unit-tested against internal reference values but have not been systematically checked against operational flight software or high-fidelity ephemerides.

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