ReaMCP

Instructions

Implementation Reference

• src/reaper_mcp/reaper_adapter.py:266-277 (handler)

  The `add_fx` method in the `ReaperAdapter` class, which dispatches the call to the underlying bridge client.

  def add_fx(
      self,
      track_index: int,
      fx_name: str,
      input_fx: bool = False,
  ) -> dict[str, Any]:
      return self._client.call(
          "add_fx",
          track_index=track_index,
          fx_name=fx_name,
          input_fx=input_fx,
      )

• src/reaper_mcp/server.py:478-492 (registration)

  The MCP tool registration and handler wrapper for `add_fx` in `server.py`.

  def add_fx(
      track_index: int,
      fx_name: str,
      input_fx: bool = False,
  ) -> dict[str, Any]:
      """
      Add an FX plugin to a track.
      - track_index: 0-based track index, or -1 for the master track
      - fx_name: any string REAPER's FX browser accepts ("ReaComp", "VST: Serum", etc.)
      - input_fx: True to add to the input FX chain
      """
      try:
          return _wrap(adapter.add_fx(track_index=track_index, fx_name=fx_name, input_fx=input_fx))
      except Exception as exc:
          return _err(exc)