TwelveTake REAPER MCP

A TwelveTake Studios project.

Setup guide, examples and FAQ -> twelvetake.com/tools/reaper-mcp

Listed in the MCP Registry as mcp-name: com.twelvetake/reaper-mcp.

A comprehensive Model Context Protocol (MCP) server that enables AI assistants to control REAPER DAW for mixing, mastering, MIDI composition, and full music production workflows.

Version: 1.8.0

Why This Server

Workflow Automation, Not Just API Wrappers

Most MCP servers just wrap REAPER's API and call it a day. This one includes production workflow helpers that handle multi-step operations in a single call:

Tool	What it does for you
setup_sidechain_compression()	Creates send, routes to channels 3-4, configures ReaComp's detector input — complete sidechain setup in one call
add_mastering_chain()	Adds ReaEQ → ReaComp → ReaEQ → ReaLimit to master track with proper signal flow
add_parallel_compression()	Creates a bus track, sets up the send, adds compressor — NY-style compression ready to blend
create_bus()	Creates a submix track and routes your specified tracks to it
get_project_summary()	Returns track count, all track names/volumes/pans/FX, markers, regions, tempo, time signature — everything your AI needs in one call

Zero Configuration

• File-based communication works immediately — no network setup, no ports to configure
• Stock REAPER only: the bridge is a plain Lua script and the analyzer is a JSFX plugin, so you don't install anything else in REAPER
• Copy the script, run it, connect your AI assistant

179 Tools Covering Real Production Needs

• Full FX control — add/remove plugins, get/set any parameter by index, manage presets, bypass
• FX parameter automation — automate any plugin knob (flanger depth, filter cutoff, etc.)
• Complete routing — sends, receives, sidechain routing to specific channel pairs
• Automation — create envelopes, add/edit points, set automation modes
• MIDI — create items, add notes individually or in batches, edit velocities
• MIDI editing — transpose, quantize with swing, humanize, snap to a scale, stretch, legato, strum, velocity ramps — each targetable by pitch range, beat window, or channel
• Audio items — import, split, duplicate, fade, position, mute
• Markers & regions — create, edit, navigate, render by region
• Measurement: loudness, loudness range, true peak, the octave-band spectrum and stereo correlation for the master, a track or an item. It passes the EBU's synthetic compliance signals for loudness, true peak and loudness range.
• Undoable edits: every change the AI makes is one named step in REAPER's undo history ("MCP: delete track"), so Ctrl+Z in REAPER reverses one tool call at a time

Requirements

• REAPER (any recent version; full live suite green through REAPER 7.79)
• Python 3.10+ (for the MCP server)
• An MCP-compatible AI assistant

Installation

1. Install the Bridge Script in REAPER

The bridge is a Lua script that runs inside REAPER. The MCP server works on your project through it. Install it one of three ways.

Option A: one command, then run it once in REAPER

uvx twelvetake-reaper-mcp --install-bridge