Gearboy MCP Server

Gearboy is an accurate, cross-platform Game Boy / Game Boy Color / Super Game Boy emulator written in C++ that runs on Windows, macOS, Linux, BSD and RetroArch, with an embedded MCP server for AI debugging and development.

People who need gaming tools inside Claude, Cursor, VS Code, or another MCP client. The project is written in C++.

VERIFIED ACTIVE

LAST COMMIT 2026-08-24 · ★ 1,192 · #12 OF 35 MAINTAINED GAMING · VERIFIED 2026-08-25

GPL-3.0 · C++ · how we verify → /methodology

01 · Install Gearboy MCP Server

before you install - you'll need

Set SDL3_TAG, USE_CLANG before connecting.

Claude Desktop

Settings → Extensions → Install, then select the https://github.com/drhelius/gearboy/releases/download/3.8.13/Gearboy-3.8.13-mcpb-macos-arm64.mcpb .mcpb bundle

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as Claude Desktop extension (.mcpb bundle)

license GPL-3.0 - declared in the repository

registry namespace io.github.drhelius is GitHub-verified and matches the repo owner

03 · What Gearboy MCP Server can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

3.8.13 · 2026-08-22

Performance optimizations · Added no-sprite-limit option · Improved VGM recorder with precise timing · Added Sharp Bilinear shaders · Improved MCP server · Improved Trace Logger in debugger · Updated Game Controller DB…

3.8.12 · 2026-08-07

Added command-line option for portable mode · Improved MCP Server implementation · libretro VFS support · Improved compatibility in Dev Containers · Updated Game Controller DB · Many bug fixes and improvements

3.8.11 · 2026-07-24

[mcp] Hardened server protocol compliance with version negotiation and validation · [mcp] Added tool behavior annotations · [mcp] Improved HTTP transport reliability and error handling · Many bug fixes and improvements

04 · Who maintains Gearboy MCP Server

Gearboy MCP Server is maintained by drhelius. We track 4 MCP servers from drhelius - 4 actively maintained, 1,944 combined GitHub stars, oldest repo from Jul 2012. Full record: all servers from drhelius.

  1. Gearsystem MCP Server MCP server for Gearsystem Sega Master System / Game Gear / SG-1000 emulator ★ 384
  2. Geargrafx MCP Server MCP server for Geargrafx PC Engine / TurboGrafx-16 emulator ★ 230
  3. Gearcoleco MCP Server MCP server for Gearcoleco ColecoVision emulator ★ 138

05 · Facts

repository
github.com/drhelius/gearboy
category
gaming - ranked #12 of 35 actively-maintained gaming servers as of 2026-08-25.
release cadence
8 releases in the last 90 days (latest 2026-08-22)
registry
io.github.drhelius/gearboy (active, first published 2026-03-26 · 14 versions)
packages
mcpb:https://github.com/drhelius/gearboy/releases/download/3.8.13/Gearboy-3.8.13-mcpb-macos-arm64.mcpb · mcpb:https://github.com/drhelius/gearboy/releases/download/3.8.13/Gearboy-3.8.13-mcpb-macos-x64.mcpb · mcpb:https://github.com/drhelius/gearboy/releases/download/3.8.13/Gearboy-3.8.13-mcpb-windows-arm64.mcpb · mcpb:https://github.com/drhelius/gearboy/releases/download/3.8.13/Gearboy-3.8.13-mcpb-windows-x64.mcpb · mcpb:https://github.com/drhelius/gearboy/releases/download/3.8.13/Gearboy-3.8.13-mcpb-linux-x64.mcpb · mcpb:https://github.com/drhelius/gearboy/releases/download/3.8.13/Gearboy-3.8.13-mcpb-linux-arm64.mcpb

06 · Gearboy MCP Server FAQ

What is Gearboy MCP Server?

Gearboy is an accurate, cross-platform Game Boy / Game Boy Color / Super Game Boy emulator written in C++ that runs on Windows, macOS, Linux, BSD and RetroArch, with an embedded MCP server for AI debugging and development.

Is Gearboy MCP Server still maintained?

Yes - as of 2026-08-25, its last commit was 2026-08-24 and it shipped 8 releases in the last 90 days. We re-verify nightly.

07 · Alternatives to Gearboy MCP Server

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