The original title is "Build a Stock Dashboard from Three Keyless Public Data Feeds"

Short summary

Three keyless public APIs—Nasdaq historical quotes, SEC company fundamentals (XBRL), and Nasdaq earnings calendar—provide all the data needed for a functional stock dashboard. Each returns structured JSON without authentication, keeping operational costs near zero and avoiding the headaches of scrapers and proxies. The tradeoff: endpoints occasionally return empty results, so validate against known tickers before trusting output.

• •Three public APIs (Nasdaq, SEC, Nasdaq calendar) provide free financial data without authentication
• •Keyless endpoints return structured JSON, eliminating proxy costs and complexity of browser-based scrapers
• •Validation required: endpoints may return empty results, so sanity-check against known dates before use

Generated with AI, which can make mistakes.