MCP server for Gearcoleco ColecoVision emulator
Most developer tooling work still happens through a UI a human drives. Gearcoleco MCP server moves it into the conversation instead. MCP server for Gearcoleco ColecoVision emulator.
Gearcoleco is a very accurate, cross-platform ColecoVision emulator written in C++ that runs on Windows, macOS, Linux, BSD and RetroArch, with an embedded MCP server for debugging and tooling.
The server publishes 8 tools. What each one is for:
BIOS — Gearcoleco needs a BIOS to run. It is possible to load any BIOS but the original one with md5 2c66f5911e5b42b8ebe113403548eee7 is recommendedSpinners — When using any kind of spinner it is useful to capture the mouse by pressing F12. It is also recommended to disable spinners for software that don'tRewind — Hold the configured rewind hotkey (Backspace by default) or a mapped gamepad shortcut to step backwards through recent gameplayOverscan — For a precise representation of the original image, select Overscan Top+Bottom and Aspect Ratio Standard (4:3 DAR) in the Video menuWindows — The Windows tool exposed by this servermacOS — The macOS tool exposed by this serverLinux — If you are using Ubuntu 25.04 or later, you can install SDL3 directly. Use the following commands to build:Libretro — The Libretro tool exposed by this serverskills on npm is all you need. Most clients run it directly, so configuration is a few lines and a restart.
Plenty of developer tooling servers cover similar ground. The differences that matter in practice are scope of access and how much setup stands between you and a working tool call. Gearcoleco's toolset — BIOS, Spinners, Rewind and 5 more — is a fair guide to whether it matches your workflow. It is maintained by drhelius; worth a glance at recent repository activity before you build anything load-bearing on it.
SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.
| Tool | What it does |
|---|---|
| BIOS | Gearcoleco needs a BIOS to run. It is possible to load any BIOS but the original one with md5 2c66f5911e5b42b8ebe113403548eee7 is recommended. |
| Spinners | When using any kind of spinner it is useful to capture the mouse by pressing F12. It is also recommended to disable spinners for software that don't use them. |
| Rewind | Hold the configured rewind hotkey (Backspace by default) or a mapped gamepad shortcut to step backwards through recent gameplay. |
| Overscan | For a precise representation of the original image, select **Overscan** Top+Bottom and **Aspect Ratio** Standard (4:3 DAR) in the **Video** menu. |
| Windows | The Windows tool exposed by this server. |
| macOS | The macOS tool exposed by this server. |
| Linux | If you are using Ubuntu 25.04 or later, you can install SDL3 directly. Use the following commands to build: |
| Libretro | The Libretro tool exposed by this server. |
{
"mcpServers": {
"gearcoleco": {
"command": "npx",
"args": ["-y", "skills"]
}
}
}Add to claude_desktop_config.json, then restart Claude Desktop.
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