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Free stock data APIs for Nordic markets: what actually works

Free APIs for Nordic equity data compared honestly: what each returns, Nordic coverage gaps, ticker conventions (.ST), and when a verified CSV beats an API.

Sources compared

SourceAccessPriceISINCoverageUpdate cadence
Yahoo Finance API Unofficial Free (unstable) no Global incl. .ST tickers 15-min
Finnhub Freemium API Free tier no Global; Nordic depth varies Real-time (tier)
Alpha Vantage Freemium API Free tier (25 req/day) no Global; Nordic sparse Daily
Nasdaq Nordic screener Web Free yes All Nordic listings Live

Yahoo Finance API: Works until it does not: TLS fingerprinting breaks naive clients.

Finnhub: Check symbol coverage for Small Cap before building.

Alpha Vantage: Rate limits make Nordic-wide pulls slow.

Nasdaq Nordic screener: The source of truth; no clean API, hence our verified CSV.

What our data adds

  • .ST ticker convention explained with 366 examples
  • ISIN support: screener yes, Yahoo no, freemium APIs partial
  • When to use a snapshot CSV vs a live API (stability vs freshness)

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Swedish Listed Companies 2026
$2
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