Straightforward US stock market data via eng0's proxy API. You get OHLCV price bars at multiple intervals (1min to 1week), news articles with sentiment analysis, and company details for any US ticker. Data goes back 5 years with 15-minute delay on quotes. The Python examples are clean and the API is simple POST requests with JSON. Honestly the best part is the sentiment reasoning on news articles, which gives you the "why" behind the classification. No rate limits mentioned, so don't abuse it. If you need SEC filings or financial statements, you'll want the sec-edgar-skill instead, this is purely market data and news.
npx skills add https://github.com/eng0ai/eng0-template-skills --skill market-data