PostFader MCP Server
PostFader runs on your own machine — the client starts it, so there is no endpoint to ping. 220 installs a week from pypi. Last commit 5 Oct 2026.
FL Studio MCP server: read, mix, compose, and edit your open FL Studio project from any MCP client.
What the code does
We read the source, 3 d ago · rules 995398eba69f
What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.
completed = subprocess.run(
self.path = os.path.join(self.root, filename)
environ=dict(os.environ),
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
This code can reach further than it looks
We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.
Connect this server
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add postfader-fl-studio-mcp -e 'FL_BRIDGE_ENABLE_MIDI=<FL_BRIDGE_ENABLE_MIDI>' -e 'FL_BRIDGE_MIDI_PORT=<FL_BRIDGE_MIDI_PORT>' -e 'FL_STUDIO_USER_DATA_DIR=<FL_STUDIO_USER_DATA_DIR>' -- uvx postfader-fl-studio-mcp{
"mcpServers": {
"postfader-fl-studio-mcp": {
"command": "uvx",
"args": [
"postfader-fl-studio-mcp"
],
"env": {
"FL_BRIDGE_ENABLE_MIDI": "<FL_BRIDGE_ENABLE_MIDI>",
"FL_BRIDGE_MIDI_PORT": "<FL_BRIDGE_MIDI_PORT>",
"FL_STUDIO_USER_DATA_DIR": "<FL_STUDIO_USER_DATA_DIR>"
}
}
}
}[mcp_servers.postfader-fl-studio-mcp]
command = "uvx"
args = ["postfader-fl-studio-mcp"]
env = { FL_BRIDGE_ENABLE_MIDI = "<FL_BRIDGE_ENABLE_MIDI>", FL_BRIDGE_MIDI_PORT = "<FL_BRIDGE_MIDI_PORT>", FL_STUDIO_USER_DATA_DIR = "<FL_STUDIO_USER_DATA_DIR>" }{
"mcpServers": {
"postfader-fl-studio-mcp": {
"command": "uvx",
"args": [
"postfader-fl-studio-mcp"
],
"env": {
"FL_BRIDGE_ENABLE_MIDI": "<FL_BRIDGE_ENABLE_MIDI>",
"FL_BRIDGE_MIDI_PORT": "<FL_BRIDGE_MIDI_PORT>",
"FL_STUDIO_USER_DATA_DIR": "<FL_STUDIO_USER_DATA_DIR>"
}
}
}
}{
"servers": {
"postfader-fl-studio-mcp": {
"type": "stdio",
"command": "uvx",
"args": [
"postfader-fl-studio-mcp"
],
"env": {
"FL_BRIDGE_ENABLE_MIDI": "<FL_BRIDGE_ENABLE_MIDI>",
"FL_BRIDGE_MIDI_PORT": "<FL_BRIDGE_MIDI_PORT>",
"FL_STUDIO_USER_DATA_DIR": "<FL_STUDIO_USER_DATA_DIR>"
}
}
}
}Put your own values in place of
<FL_BRIDGE_ENABLE_MIDI> (Set to 1 to build the MIDI SysEx transport. Without it the server cannot reach FL Studio), <FL_BRIDGE_MIDI_PORT> (Exact virtual MIDI endpoint name shared with FL Studio. PostFader does not install or configure a virtual MIDI provider), <FL_STUDIO_USER_DATA_DIR> (Absolute FL Studio user-data directory containing Settings/Hardware).
The author’s registry entry marks them as required.
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PostFader — questions
Answers built from our own checks of this server.