obs-mcp-server

Instructions

Implementation Reference

• obs-mcp-server.js:463-489 (handler)

  The handler logic for the 'list_audio_inputs' tool, which fetches audio inputs and outputs from OBS and formats their mute/volume status.

  case "list_audio_inputs": {
    const { inputs } = await obs.call("GetInputList", {
      inputKind: "wasapi_input_capture",
    });
    // Also grab output captures (desktop audio) — merge both
    const { inputs: outputs } = await obs.call("GetInputList", {
      inputKind: "wasapi_output_capture",
    });
    const all = [...inputs, ...outputs];
    const withMute = await Promise.all(
      all.map(async (input) => {
        const { inputMuted } = await obs.call("GetInputMute", {
          inputName: input.inputName,
        });
        const { inputVolumeMultiplier } = await obs.call("GetInputVolume", {
          inputName: input.inputName,
        });
        return {
          name: input.inputName,
          kind: input.inputKind,
          muted: inputMuted,
          volume: Math.round(inputVolumeMultiplier * 100) / 100,
        };
      })
    );
    return ok({ audio_inputs: withMute });
  }

• obs-mcp-server.js:139-143 (registration)

  The registration of the 'list_audio_inputs' tool including its description and schema.

  {
    name: "list_audio_inputs",
    description: "List all audio input sources (mics, desktop audio, etc.).",
    inputSchema: { type: "object", properties: {} },
  },