Free APIs
Free Finance & crypto APIs
| API | Free tier | Auth | Docs |
|---|---|---|---|
| CoinGecko API Crypto prices, market caps, exchanges and history Catch: Demo key needed; attribution required; limited history | Demo plan: 100 calls/minute, 10,000 calls/month | API key | docs |
| CoinPaprika API Crypto market data, coin and exchange info Catch: Free plan has limited history and endpoints | Free plan: 20,000 calls/month | No key | docs |
| CoinMarketCap API Crypto listings, quotes and metadata Catch: Basic plan: limited endpoints and no historical data | Free Basic plan with monthly call credits | API key | docs |
| Binance Spot Market Data API Public crypto order book, trades and candlesticks Catch: IP-based weight limits; some regions blocked | Public market data endpoints are free, no key | No key | docs |
| mempool.space API Bitcoin blocks, transactions, fees and addresses Catch: Rate limited; self-host for volume | Free public API, no key | No key | docs |
| Etherscan API Ethereum blocks, transactions, balances and logs Catch: Personal and research use; subset of chains | Free plan: 3 calls/second, up to 100,000 API calls/day | API key | docs |
| Alpha Vantage Stock, forex and crypto time series and indicators Catch: 25/day; premium needed for more or real-time US data | Free key: 25 API requests per day | API key | docs |
| Finnhub Real-time stock quotes, company data and news Catch: Some endpoints are premium-only | Free plan: 60 API calls/minute | API key | docs |
| Twelve Data Stocks, forex, crypto and ETFs, time series and indicators Catch: Free plan has per-minute and daily credit limits | Free Basic plan (key required) | API key | docs |
| Financial Modeling Prep Stock prices, financial statements and ratios Catch: Free plan: limited symbols and history | Free plan: 250 requests/day | API key | docs |
| SEC EDGAR APIs US company filings and XBRL financial data Catch: Must declare a User-Agent; 10 requests/second limit | Free, no key; max 10 requests/second | No key | docs |
| FRED API Hundreds of thousands of US and international economic series Catch: Subject to Federal Reserve Bank of St. Louis terms of use | Free key | API key | docs |
| Alpaca Market Data US stock and crypto historical and real-time data Catch: Basic plan: IEX data only; SIP data delayed 15 minutes | Free Basic plan: 200 historical API calls/minute | API key | docs |
FAQ
What is the best free finance & crypto API?+
CoinGecko API, CoinPaprika API, CoinMarketCap API are good places to start. Compare the free tiers and catches in the table; they differ mostly in limits and whether commercial use is allowed.
Is there a finance & crypto API without an API key?+
Yes: CoinPaprika API, Binance Spot Market Data API, mempool.space API, SEC EDGAR APIs work without a key.
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