FreeAPI.watch

Best Free Finance APIs (July 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.

Quick answer:

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. #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. #2 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

  3. #3 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

  4. #4 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

  5. #5 Frankfurter — 🟢 Online

    Free currency exchange rates from the European Central Bank. No key required.

    Unlimited, no key, no credit card

  6. #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. #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. #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. #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. #10 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

  11. #11 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

  12. #12 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

  13. #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. #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

The free finance API landscape in 2026

Finance APIs cover three overlapping categories: real-time market data (stocks, forex, futures), fundamentals and reference data (earnings, filings, ratios), and macroeconomic series (rates, inflation, GDP). Each has a different free-tier reality. Real-time equity data is essentially never free — the exchanges charge for it and API providers pass the cost through. Fundamentals and macro are frequently free from government or nonprofit sources.

The 2026 landscape has been shaped by two forces. First, the Yahoo Finance v7 endpoint that indie developers relied on for a decade has become increasingly unstable — Yahoo aggressively blocks scrapers, and the unofficial libraries that wrapped it break monthly. Second, StLouisFed's FRED API has become the de-facto standard for macro data (200,000+ series, unlimited free calls, sub-second response). For personal projects and prototypes, FRED plus a delayed-quote source (AlphaVantage, FMP free tier) covers most cases.

This category page ranks the survivors: AlphaVantage, FMP, Twelve Data, Finnhub, StLouisFed FRED, ECB Rates, Frankfurter, and Fixer.io. Rankings weight uptime and the honesty of the free tier (many providers advertise 'unlimited' free quotes but throttle aggressively past a few dozen per minute).

How to choose a free finance API

Start with data class. Do you need equity quotes (AlphaVantage, FMP, Twelve Data), forex (Frankfurter, ECB, Fixer), crypto (see the /category/cryptocurrency page), fundamentals (FMP, Finnhub), or macro (FRED, ECB)? Each class has a different free-tier ecosystem and mixing calls across classes in a single provider is usually more expensive than picking a specialist for each.

Then check delay tolerance. Real-time equity quotes on the free tier are effectively 15-20 minute delayed at all providers because that's the licensing tier that costs the provider nothing. If your app needs true real-time (trading, alerting) you must pay. If your app is a research tool, portfolio tracker, or educational demo, delayed data is usually fine — say so on the page so users understand.

Finally, check coverage. Most free finance APIs cover US equities well, EU equities passably, and emerging markets thinly or not at all. FMP covers the deepest set of tickers. Twelve Data has the strongest FX coverage. Frankfurter is the cleanest for daily forex historical series against ECB reference rates.

Common pitfalls when integrating finance APIs

The most common mistake is caching without respecting market-hours semantics. Weekend and holiday quotes are the previous close, and caching them for hours is fine — but caching an intraday quote for an hour turns your 'real-time' feature into a lie. Cache TTL should be seconds during market hours, minutes overnight.

The second is timezone confusion around exchange sessions. NYSE trades 9:30 AM to 4:00 PM Eastern. LSE trades 8:00 AM to 4:30 PM London. Free APIs usually return timestamps in UTC and expect you to know the exchange schedule. Do not display a quote from 8:00 PM UTC as 'now' when the market closed six hours ago.

The third is trusting free-tier fundamentals coverage. Free tiers of fundamentals APIs often give you the last 4 quarters — enough for a screener demo, not enough for real analysis. Verify the historical depth before you build a chart component that assumes 10 years of data.

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.

See Finance APIs that died →

Last verified: July 7, 2026 · Rankings recomputed hourly from live uptime data. Editorial content reviewed monthly against provider docs.