DDC-CI Control Bridge vs m1ddc
DDC-CI Control Bridge
github.comm1ddc
github.comSide by side
| Figure | DDC-CI Control Bridge | m1ddc |
|---|---|---|
| Price from | — | Free |
| Free plan | — | Yes |
| Free trial | — | — |
| Open source | — | — |
| Windows | Yes | — |
| macOS | Yes | Yes |
| Linux | Yes | — |
| API | Yes | — |
| Self-hosted | Yes | — |
| Plans published | 0 | 1 |
| Spec score · Monitor Control Software | 7.6 (#9) | 7.1 (#19) |
| Intended users | The project describes use by AI agents through MCP and automation platforms through MQTT. | The README presents m1ddc as a command-line tool for Apple Silicon Mac users who want to control external displays or use display controls in scripts. |
| License | The repository identifies the project as MIT licensed. | The repository includes an MIT License. |
| Purpose | The project controls monitor brightness, contrast, power, and input through DDC/CI. | m1ddc controls external displays with DDC/CI on Apple Silicon Macs. |
Plans
In their own words
DDC-CI Control Bridge
DDC-CI Control Bridge is a free project for controlling compatible monitors through DDC/CI. It can manage brightness, contrast, power, and input, and offers command-line or API access. Its Model Context Protocol server provides resources and tools for AI or agent integration, including reading and writing VCP codes, setting brightness from 0 to 100, and rescanning monitors and capabilities. An MQTT client connects it to automation systems. Listed integrations include Home Assistant auto-discovery, openHAB, Node-RED, Domoticz, and generic MQTT platforms. The project is available as an npm package or as standalone executables for Windows, Linux, and macOS. MCP can run locally over stdio or provide remote HTTP/SSE access to other machines on a network. Authentication requires the DDC_API_KEY environment variable. The project is MIT licensed and invites contributions through GitHub issues or pull requests. A monitor must support DDC/CI with the feature enabled in its on-screen settings. On Linux, access may require i2c-dev and membership in the i2c group. Some VCP codes are read-only, and supported codes vary by monitor.
m1ddc
m1ddc is a free command-line tool for controlling external displays from Apple Silicon Macs. Through DDC/CI, it can set or read luminance, contrast, RGB gain, volume, mute, and input source when a display supports those controls. Supported connections include USB-C, DisplayPort Alt Mode, and compatible built-in HDMI ports. Certain Dell displays also expose PIP, PBP, and KVM configuration. The command-line interface is intended for scripts, and the project links to a Hammerspoon example. A Raycast Display Input Switcher extension is also linked, although it does not cover every m1ddc feature. The tool is available for macOS on Apple Silicon and does not support Intel Macs. Building requires clang from Apple’s Command Line Tools; the README says those tools install automatically if absent. The repository includes an MIT License. Display behavior depends on the connected monitor’s supported controls.