How to Scrape Stock Market Data with Free APIs (Yahoo Finance, Alpha Vantage)

Financial data scraping powers trading bots, dashboards, and research tools.

Yahoo Finance (Unofficial, Free)

async function getStockQuote(symbol) {
  const url = `https://query1.finance.yahoo.com/v8/finance/chart/${symbol}?interval=1d&range=1mo`;
  const res = await fetch(url, { headers: { "User-Agent": "StockBot/1.0" } });
  const data = await res.json();
  const result = data.chart.result[0];
  return {
    symbol,
    currency: result.meta.currency,
    price: result.meta.regularMarketPrice,
    previousClose: result.meta.previousClose,
    timestamps: result.timestamp,
    prices: result.indicators.quote[0].close
  };
}

Alpha Vantage (Free, Key Required)

https://www.alphavantage.co/query?function=TIME_SERIES_DAILY&symbol=AAPL&apikey=YOUR_KEY

Free: 25 requests/day.

Other Free Sources

Source	Data	Key
Yahoo Finance	Quotes, charts	None
Alpha Vantage	Historical, forex	Free
Finnhub	Real-time	Free
IEX Cloud	US stocks	Free tier
CoinGecko	Crypto	None

Use Cases

1. Trading bot data feeds
2. Portfolio tracking dashboards
3. Market research reports
4. Price alert systems
5. Historical backtesting

Resources

• Crypto Data APIs
• Price Monitor
• 77 Free Scrapers

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