Best Free Finance APIs (June 2026)
Ranked by uptime + speed + free-tier quality. Updated every hour.
Looking for a free finance API that works today? The list below is ranked by our composite score — weighted 60% uptime, 30% response speed, and 10% free-tier accessibility, recalculated every hour from live checks. See our methodology for how the score is computed.
We track 14 free finance APIs with live hourly checks. The current top pick is European Central Bank Rates (100% 30-day uptime) — and it needs no API key. 2 of the 14 require no API key at all, and 4 hold 99%+ uptime.
- #1 European Central Bank Rates — 🟢 Online
Official ECB foreign exchange reference rates in XML format. Covers 30+ currencies with daily updates. No key required.
Unlimited, no key, no credit card
- #2 Frankfurter — 🟢 Online
Free currency exchange rates from the European Central Bank. No key required.
Unlimited, no key, no credit card
- #3 Twelve Data — 🟢 Online
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
- #4 Fixer.io — 🟢 Online
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
- #5 Alpha Vantage — 🟢 Online
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
- #6 Finnhub — 🔴 Offline
Real-time stock prices, company fundamentals, economic data, and sentiment analysis for global markets.
60 calls/min, free key, no credit card
- #7 ExchangeRate-API — 🔴 Offline
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
- #8 Polygon.io — 🔴 Offline
Real-time and historical stock, options, forex, and crypto market data with WebSocket streaming support.
Unlimited delayed data, free key, no credit card
- #9 Financial Modeling Prep — 🔴 Offline
Stock fundamentals, financial statements, DCF models, and market data for 25,000+ stocks globally.
250 calls/day, free key, no credit card
- #10 Marketstack — 🔴 Offline
Real-time and historical stock market data covering 125,000+ tickers from 70+ global stock exchanges.
100 calls/month, free key, no credit card
- #11 Currency API (currencyapi.com) — 🔴 Offline
Currency conversion and exchange rate API with 170+ currencies and historical rates going back to 1999.
300 calls/month, free key, no credit card
- #12 Open Exchange Rates — 🔴 Offline
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
- #13 FRED Economic Data API — 🔴 Offline
Official Federal Reserve Bank of St. Louis API with 800,000+ US and international economic time-series datasets.
Unlimited, free key, no credit card
- #14 IEX Cloud — 🔴 Offline
Financial data platform with real-time stock prices, fundamentals, forex, and economic indicators.
50,000 credits/month (Starter plan), free key, no CC
Compare Finance APIs
Side-by-side comparisons of the top Finance APIs — free tier, uptime, and response time:
Frequently Asked Questions
What is the best free currency exchange rate API in 2026?
Frankfurter is the standout choice: no API key, no rate limits on reasonable usage, and data sourced directly from the European Central Bank. Open Exchange Rates and ExchangeRate-API both offer free tiers but cap hourly or monthly requests.
Do free finance APIs provide real-time stock prices?
Most free finance APIs focus on currency exchange rates, which update daily from central banks. Real-time stock data is expensive and rarely available for free. Alpha Vantage provides free stock data but with a 5 calls/minute limit and a 15-minute delay.
Is Frankfurter reliable for production use?
Frankfurter has strong uptime in our monitoring. It sources data from the European Central Bank, which publishes rates on business days. For production use, note that ECB rates update once per day — if you need intraday rates you'll need a commercial provider.
Which free finance APIs don't require an API key?
Frankfurter requires no key at all. Most other finance APIs require at minimum a free account and API key. Check our live rankings on this page to see current uptime data for each provider.
Can I use free finance APIs in a fintech product?
For display purposes, most free tiers permit commercial use. However, if your product makes financial decisions based on the data, check the provider's terms carefully — some restrict use in automated trading or financial advisory contexts. Always attribute your data source.