Marketstack Marketstack is a real-time stock market data API. It provides financial data to developers and businesses for building applications that require up-to-date stock information. Official docs: https://marketstack.com/documentation Marketstack Overview - Stock Exchange - Ticker - EOD (End-of-Day) Data - Historical Data - Intraday Data - Tickers - Exchange Working with Marketstack This skill uses the Membrane CLI to interact with Marketstack. Membrane handles authentication and credentials refresh automatically — so you can focus on the integration logic rather than auth plumbing. Inst…