ReaMCP

Instructions

Implementation Reference

• src/reaper_mcp/server.py:584-600 (handler)

  The tool handler for 'list_fx_presets' which is registered with FastMCP.

  @mcp.tool()
  def list_fx_presets(
      track_index: int, fx_index: int
  ) -> dict[str, Any]:
      """
      List available presets for an FX already on a track.
      Returns two lists:
      - factory_presets: presets exposed by the plugin itself (CLAP, VST3, VST2 banks).
        Each entry has {index, name, source='factory'}. These can be loaded by name
        with set_fx_preset().
      - file_presets: .ffp/.fxp files found on disk under standard vendor preset dirs.
        Each entry has {name, category, path, source='file'}. Load via the 'path' field.
      """
      try:
          return _wrap(adapter.list_fx_presets(track_index=track_index, fx_index=fx_index))
      except Exception as exc:
          return _err(exc)

• src/reaper_mcp/reaper_adapter.py:330-337 (handler)

  The underlying adapter method that calls the bridge client to list FX presets in REAPER.

  def list_fx_presets(
      self, track_index: int, fx_index: int
  ) -> dict[str, Any]:
      return self._client.call(
          "list_fx_presets",
          track_index=track_index,
          fx_index=fx_index,
      )