LIFX MCP Server

Instructions

Implementation Reference

• src/index.ts:355-386 (handler)

  Handler function for 'breathe_effect' tool that constructs the request body from parameters and calls the LIFX API to start the breathe effect.

  case "breathe_effect": {
    const { token, selector = "all", ...effectParams } = args as {
      token: string;
      selector?: string;
      color: string;
      from_color?: string;
      period?: number;
      cycles?: number;
      persist?: boolean;
      power_on?: boolean;
      peak?: number;
    };
  
    const body = Object.fromEntries(
      Object.entries(effectParams).filter(([_, value]) => value !== undefined)
    );
  
    const result = await makeLIFXRequest(`/lights/${selector}/effects/breathe`, {
      method: "POST",
      body,
      token,
    });
  
    return {
      content: [
        {
          type: "text",
          text: `Breathe effect started for selector "${selector}". ${JSON.stringify(result, null, 2)}`,
        },
      ],
    };
  }

• src/index.ts:185-202 (schema)

  Tool definition including name, description, and JSON input schema for validation.

  {
    name: "breathe_effect",
    description: "Perform a breathe effect",
    inputSchema: {
      type: "object",
      properties: {
        token: { type: "string", description: "LIFX API token" },
        selector: { type: "string", description: "Selector for filtering lights (default: 'all')" },
        color: { type: "string", description: "Color to breathe" },
        from_color: { type: "string", description: "Starting color" },
        period: { type: "number", minimum: 0.1, description: "Duration of one cycle in seconds" },
        cycles: { type: "number", minimum: 1, description: "Number of cycles" },
        persist: { type: "boolean", description: "Persist the final color" },
        power_on: { type: "boolean", description: "Turn on if off" },
        peak: { type: "number", minimum: 0, maximum: 1, description: "Peak brightness (0.0 to 1.0)" },
      },
      required: ["token", "color"],
    },

• src/index.ts:72-114 (helper)

  Helper function used by the handler to make authenticated HTTP requests to the LIFX API.

  async function makeLIFXRequest(
    endpoint: string,
    options: {
      method?: string;
      body?: any;
      token: string;
    }
  ): Promise<any> {
    const { method = "GET", body, token } = options;
    
    const url = `${LIFX_API_BASE}${endpoint}`;
    const headers: Record<string, string> = {
      "Authorization": `Bearer ${token}`,
      "User-Agent": USER_AGENT,
    };
  
    if (body && (method === "POST" || method === "PUT")) {
      headers["Content-Type"] = "application/json";
    }
  
    try {
      const response = await fetch(url, {
        method,
        headers,
        body: body ? JSON.stringify(body) : undefined,
      });
  
      if (!response.ok) {
        const errorText = await response.text();
        throw new Error(`LIFX API error: ${response.status} ${response.statusText} - ${errorText}`);
      }
  
      // Some endpoints return empty responses
      const contentType = response.headers.get("content-type");
      if (contentType?.includes("application/json")) {
        return await response.json();
      }
      
      return await response.text();
    } catch (error) {
      throw new Error(`Failed to make LIFX API request: ${error instanceof Error ? error.message : String(error)}`);
    }
  }