Install PostFader in Zed

What you need first

• Zed, installed.
• uv, which gives the uvx command the server starts with.
• Your own values for YOUR_FL_BRIDGE_ENABLE_MIDI,YOUR_FL_BRIDGE_MIDI_PORT,YOUR_FL_STUDIO_USER_DATA_DIR.

Steps

1. Open Zed's settings file, ~/.config/zed/settings.json (on Windows %APPDATA%\Zed\settings.json), or .zed/settings.json for one project.
2. Add this block. If the file already has context_servers, add only the entry inside it.

{
  "context_servers": {
    "postfader-fl-studio-mcp": {
      "command": "uvx",
      "args": ["postfader-fl-studio-mcp==12.0.3"],
      "env": { "FL_BRIDGE_ENABLE_MIDI": "YOUR_FL_BRIDGE_ENABLE_MIDI", "FL_BRIDGE_MIDI_PORT": "YOUR_FL_BRIDGE_MIDI_PORT", "FL_STUDIO_USER_DATA_DIR": "YOUR_FL_STUDIO_USER_DATA_DIR" }
    }
  }
}

3. Replace YOUR_FL_BRIDGE_ENABLE_MIDI,YOUR_FL_BRIDGE_MIDI_PORT,YOUR_FL_STUDIO_USER_DATA_DIR with your own values.
4. Save the file. Zed starts the server, and Settings › AI › MCP Servers lists it.

Check it worked

Ask Zed: List the tools of postfader-fl-studio-mcp.

If it does not start

spawn uvx ENOENT

uv is not on the PATH that Zed sees. Install it, or write the full path of uvx in the config.

The server starts, but its tools fail

A YOUR_… placeholder is still in the config, or its value is wrong.

Nothing changes after a restart

The file is not valid JSON any more. Look for a missing comma where the block was added.