Best Free Finance APIs (May 2026)
Ranked by uptime + speed + free-tier quality. Updated every hour.
- #1 Frankfurter — 🟡 Unknown
Free currency exchange rates from the European Central Bank. No key required.
Unlimited, no key, no credit card
- #2 European Central Bank Rates — 🟡 Unknown
Official ECB foreign exchange reference rates in XML format. Covers 30+ currencies with daily updates. No key required.
Unlimited, no key, no credit card
- #3 Alpha Vantage — 🟡 Unknown
Stock market, forex, and cryptocurrency data API with 20+ years of historical data and real-time quotes.
25 calls/day, free key, no credit card
- #4 Twelve Data — 🟡 Unknown
Financial market data API covering stocks, forex, ETFs, and mutual funds with real-time and historical data.
800 calls/day, free key, no credit card
- #5 Financial Modeling Prep — 🟡 Unknown
Stock fundamentals, financial statements, DCF models, and market data for 25,000+ stocks globally.
250 calls/day, free key, no credit card
- #6 Polygon.io — 🟡 Unknown
Real-time and historical stock, options, forex, and crypto market data with WebSocket streaming support.
Unlimited delayed data, free key, no credit card
- #7 Finnhub — 🟡 Unknown
Real-time stock prices, company fundamentals, economic data, and sentiment analysis for global markets.
60 calls/min, free key, no credit card
- #8 Open Exchange Rates — 🟡 Unknown
Foreign exchange rates and currency conversion API with hourly updates and 200+ currencies supported.
1,000 calls/month, USD base only, free key, no CC
- #9 ExchangeRate-API — 🟡 Unknown
Simple and reliable currency exchange rate API with 160+ currencies and daily updates, free plan available.
1,500 calls/month, free key, no credit card
- #10 Fixer.io — 🟡 Unknown
Foreign exchange rate API with daily rates from ECB and 170+ currencies, widely used for financial apps.
100 calls/month, EUR base only, free key, no CC
- #11 Marketstack — 🟡 Unknown
Real-time and historical stock market data covering 125,000+ tickers from 70+ global stock exchanges.
100 calls/month, free key, no credit card
- #12 IEX Cloud — 🟡 Unknown
Financial data platform with real-time stock prices, fundamentals, forex, and economic indicators.
50,000 credits/month (Starter plan), free key, no CC
- #13 Currency API (currencyapi.com) — 🟡 Unknown
Currency conversion and exchange rate API with 170+ currencies and historical rates going back to 1999.
300 calls/month, free key, no credit card
- #14 FRED Economic Data API — 🟡 Unknown
Official Federal Reserve Bank of St. Louis API with 800,000+ US and international economic time-series datasets.
Unlimited, free key, no credit card