MCP SERVERS
Put your AI assistant to work inside the software you already use.
An MCP server connects an AI assistant to a program on your computer. Instead of telling you which menus to click, the assistant makes the change itself: ask it to set up sidechain compression from the kick to the bass, and it does it in your open REAPER project.
Our three servers are free, run on your own computer, and work with Claude Desktop, the ChatGPT desktop app and Codex, Gemini CLI, GitHub Copilot, Cursor and other AI apps.
For REAPER users
REAPER MCP
Ask your AI assistant to do the tedious work in your REAPER session, such as routing a sidechain, tightening MIDI timing or checking your master's loudness, and it does it in the project you have open.
"Set up sidechain compression from the kick to the bass"
Stable
Windows, macOS and Linux
For GIMP users and DTF print shops
GIMP Studio MCP
Your assistant edits images in GIMP 3: cutouts, layers, color, print sizing and transfer-ready PNGs.
"Knock out the white background but keep the white in the logo"
Beta: tools can still change
Windows, macOS and Linux
For Line 6 Helix Stadium players
Helix Stadium MCP
Your assistant reads, explains and edits your .hsp preset files, and keeps a backup of every change.
"Roll the cab's high cut back to 6 kHz to tame the fizz"
Alpha: expect changes
Windows (macOS in progress)
Supported AI apps
Any AI app that can start a local MCP server can use these three. That includes:
- + Claude Desktop
- + The ChatGPT desktop app, Codex CLI and the Codex IDE extension
- + Gemini CLI
- + GitHub Copilot in VS Code, Visual Studio, JetBrains IDEs and Copilot CLI
- + JetBrains AI Assistant
- + Cursor
- + Devin Desktop (formerly Windsurf)
- + Cline
- + Zed
- + LM Studio
- + Perplexity for Mac
ChatGPT in a web browser connects only to servers hosted online, so it can't start these. Use the ChatGPT desktop app or Codex instead.
Current as of September 28, 2026. AI apps add and change MCP support often, so if yours isn't listed, check its documentation for "MCP servers".
Setup
Setup takes a terminal, one settings file in your AI app and, for REAPER and GIMP, a one-time bridge that lets the server talk to the program. You paste a command or two, add a short block of settings, and restart the app. You don't write any code.
Each server's page walks through every step, including where the settings file lives for Claude Desktop, the ChatGPT desktop app and Codex, Gemini CLI, Cursor and VS Code.
Common features
They run on your own computer
The servers make no internet connections of their own. What your assistant reads from your project, image or preset goes to the AI model you use, the same as anything you type.
Changes can be undone
REAPER records each edit as one step in its undo history. GIMP Studio MCP can checkpoint an image and roll it back. Helix Stadium MCP keeps a .bak backup beside every preset it changes.
Free and open source
All three are released under the MIT license, with their source, tests and changelogs on GitHub.
Questions
What does MCP stand for?
Model Context Protocol. It's an open standard for connecting AI apps to other software, which is why one server works with so many different AI apps.
Do I need to know how to code?
No. You'll paste a couple of commands into a terminal and add one block to your AI app's settings file. Each server's page shows every step.
Do they cost anything?
The servers are free. The AI app you connect them to has its own pricing.
Is it safe to let an AI assistant change my work?
Each server keeps changes reversible: REAPER's undo history, checkpoints in GIMP, and a backup of every Helix preset it edits. Each server's page has a section on exactly what it can and can't undo.
Want an AI assistant working inside your own software?
GIMP Studio MCP was built for a working print shop's DTF pipeline, then released. We build the same kind of server for your application, your file formats or your internal tools.