{
    "success": true,
    "message": "Success",
    "data": {
        "service": "Golden Area VoIP API",
        "version": "1.0",
        "description": "REST API for Yeastar TG800 GSM Gateway",
        "endpoints": {
            "GET  /api/health": "System health check",
            "POST /api/call": "Initiate new call",
            "GET  /api/call/{call_uuid}": "Get call details",
            "GET  /api/calls": "List calls (paginated)",
            "GET  /api/stats": "Get call statistics"
        }
    }
}