Connects Claude to LS Securities' OpenAPI for Korean and international stock market data. You get real-time quotes, multi-timeframe charts with technical indicators (MA, RSI, MACD, Bollinger), market screeners by price/volume/fundamentals, sector and theme tracking, program trading flows, and ETF composition analysis. It also manages a local paper portfolio with multi-broker position tracking and average-cost calculations. As of v1.6, it includes read-only access to live LS brokerage accounts for balance, orders, and P&L. Responses are intentionally compact with summary-first formats to keep token usage low during extended screening and chart analysis sessions. Requires LS Securities API credentials and .NET SDK 10 or higher.