MCP Servers

OpenRocket is a free, fully featured model rocket simulator that allows you to design and simulate your rockets before actually building and flying them.

OpenRocket MCP Support Fork

This repository is a modified OpenRocket fork that adds MCP-based AI control on top of the original simulator.

• Original OpenRocket repository: openrocket/openrocket
• Official OpenRocket website: openrocket.info
• Official documentation: OpenRocket ReadTheDocs

What this fork adds

• core automation APIs for reading and mutating rocket documents programmatically
• swing live bridge support so an AI client can control an open OpenRocket GUI session
• mcp/ stdio MCP server for Codex and other MCP-compatible clients
• launcher scripts for starting the live OpenRocket session and the MCP server
• an AI activity console that tails the automation log while OpenRocket is running

Quick start for the MCP-enabled version

1. Install Java 17 or newer.
2. Clone this repository.
3. Start the OpenRocket live session:

.\run-openrocket-live.cmd

4. Start the MCP server in a second terminal:

.\mcp\run-openrocket-mcp.cmd

5. Point your MCP client to mcp\run-openrocket-mcp.cmd.

For Codex, use mcp\run-openrocket-mcp.cmd as the server command.

What the launchers do

• run-openrocket-live.cmd
  • builds installDist when needed
  • starts OpenRocket with the localhost live bridge enabled
  • opens an OpenRocket AI Console window that tails %USERPROFILE%\.openrocket\ai-automation.log
• mcp\run-openrocket-mcp.cmd
  • builds :mcp:installDist
  • starts the stdio MCP server
  • forwards automation activity to the same OpenRocket log file

Project layout

• core/: OpenRocket core plus automation layer
• swing/: OpenRocket GUI plus live bridge integration
• mcp/: MCP server that exposes OpenRocket control to AI clients
• run-openrocket-live.cmd / run-openrocket-live.ps1: local launcher for the live GUI bridge

Notes

• This repo keeps OpenRocket's original source tree and adds MCP support inside the same project.
• Custom motor files are not bundled in this standalone repo; import your own .eng files if needed.
• This project remains under OpenRocket's GPL licensing terms. See LICENSE.TXT.

🛠️ Design, Visualize, and Analyze

1. Design your rockets using a rich selection of built-in components:

2. Visualize your masterpiece in 3D:

3. Plot & Analyze your simulation results for precision and improvements:

🌟 Features

• Six-degree-of-freedom flight simulation
• Automatic design optimization
• Realtime simulated altitude, velocity, and acceleration display
• Staging and clustering support
• Export to other simulation programs (RockSim, RASAero II)
• Export component(s) to OBJ file for 3D printing or SVG for laser cutting
• Cross-platform (Java-based)

... plus many more

📖 Read more on our website.

💾 Installers

You can find the OpenRocket installers here.

Release notes are available on each release's page or on our website.

📖 Documentation

You can find our documentation on ReadTheDocs.

🚀 Getting started

Check out our documentation for a detailled guide on how to get started.

The easiest way to get familiar with OpenRocket is to open one of our in-program example designs:

Dive into the essentials: adjust component dimensions, plot a simulation, swap out motors, ... Explore the impact of your changes and, most importantly, enjoy the process! 😊

📐 OpenRocket-related Projects & Tools

Note: If you have an OpenRocket-related project you would like included in the list, you can file a new issue for it.

Core Projects

| Project | Type | Description | |---------------------------------------------------------------------------------------|------------------|----------------------------------------------------------------| | openrocket/openrocket | Core project | Main simulator (Java) | | openrocket/openrocket.github.io | Website source | Website content (Jekyll) | | openrocket/openrocket-database | Data enhancement | Expanded parts catalog (originally dbcook/openrocket-database) |

Integration & Scripting

| Project | Type | Description | |-----------------------------------------------------------------------------------------|----------------------------|-------------------------------------------------------------------------------------| | openrocket/orhelper | Integration (Python) | Python scripting/module for OpenRocket (via JPype) (forked from SilentSys/orhelper) | | RocketPy-Team/RocketSerializer | Integration (Python) | Convert .ork files to RocketPy-compatible formats | | SpaceTeam/ortools | Integration Tools (Python) | Scripts like 6DOF landing scatter visualization | | schrum2/OpenRocketQD | Optimization tool (Python) | Quality Diversity optimization for rocket designs | | waterloo-rocketry/or-monte-carlo | Simulation tool (Java) | Monte Carlo simulation wrapper for OpenRocket |

Engine & Aerodynamics Extensions

| Project | Type | Description | |----------------------------------------------------------------------|--------------------------|----------------------------------------| | SpaceTeam/ORLEG | Engine modeling (Python) | Liquid-engine generator for OpenRocket | | WPI-HPRC/ORBrake (archived) | Plugin (Java) | Active drag control (air-brakes) |

Wind & Atmospheric Data

| Project | Type | Description | |--------------------------------------------|--------------------------|--------------------------------------------------------------------------------------| | ORWind | Atmospheric data utility | Fetches/imports multi-level wind data for OpenRocket | | Aloft | Weather data utility | Retrieves weather/atmospheric profiles (winds, temp, pressure) for flight simulation |

Design & CAD Integration

| Project | Type | Description | |-----------------------------------------------------------------------|---------------|-------------------------------------------------------------------------------| | FreeCAD Rocket Workbench | CAD workbench | A rocket design workbench for FreeCAD that can import OpenRocket .ork files |

Example Designs / Showcase

| Project | Type | Description | |-----------------------------------------------------------------------------------|-----------------|-------------------------| | TrinetraOne-OpenRocket | Example designs | Showcase rocket project |

💪 Contribute

Help us soar higher! Whether it's implementing features, writing documentation, or creating design examples, every contribution matters. Interested? Check out how to get involved and the practicalities of contributing.

✨ Contributors

• Sampo Niskanen - Original developer
• Doug Pedrick - RockSim designs, printing
• Kevin Ruland - Android version
• Bill Kuker - 3D visualization
• Richard Graham - Geodetic computations
• Jason Blood - Freeform fin set import
• Boris du Reau - Internationalization
• Daniel Williams - Pod support, maintainer
• Joe Pfeiffer - Maintainer
• Billy Olsen - Maintainer
• Sibo Van Gool - RASAero file format, 3D OBJ export, dark theme, maintainer
• Neil Weinstock - Tester, icons, forum support
• H. Craig Miller - Tester

You can view the full list of contributors here.

🌍Translators

• Tripoli France
• Tripoli Spain
• Stefan Lobas / ERIG
• Mauro Biasutti
• Sky Dart Team / Ruslan V. Uss
• Vladimir Beran
• Polish Rocketry Society / Łukasz & Alex Kazanski
• Sibo Van Gool
• Mohamed Amin Elkebsi
• Oleksandr Hladin
• taotieren Simplified Chinese

Want to help us translate OpenRocket into your language? Join our Crowdin project and contribute!

📜 License

OpenRocket is proudly open-source under the GNU GPL license. Feel free to use, study, and extend.