Finance APIs deliver stock prices, market data, banking information, and financial analytics. Build trading dashboards, portfolio trackers, or fintech applications with real-time financial data.
Last verified: April 1, 2026
| Name | Description | Auth | HTTPS | CORS | Status |
|---|---|---|---|---|---|
| Aletheia | Insider trading data, earnings call analysis, financial statements, and more | apikey | Yes | yes | alive |
| Alpaca | Realtime and historical market data on all US equities and ETFs | apikey | Yes | yes | alive |
| apilayer marketstack | Real-Time, Intraday & Historical Market Data API | apikey | Yes | unknown | alive |
| Banco do Brasil | All Banco do Brasil financial transaction APIs | oauth | Yes | yes | alive |
| Bank Data API | Instant IBAN and SWIFT number validation across the globe | apikey | Yes | unknown | alive |
| Banking Access Index | Which US business banking providers accept founders by country of residence, with sources | none | Yes | yes | unknown |
| Billplz | Payment platform | apikey | Yes | unknown | alive |
| Boleto.Cloud | A api to generate boletos in Brazil | apikey | Yes | unknown | alive |
| Citi | All Citigroup account and statement data APIs | apikey | Yes | unknown | alive |
| Dino.markets | Matched Kalshi and Polymarket prediction-market data, cross-venue spreads | apikey | Yes | no | unknown |
| Drillr | Fundamentals, filings, earnings, ownership and events for US, China and Japan equities | apikey | Yes | no | unknown |
| Econdb | Global macroeconomic data | none | Yes | yes | alive |
| Edgrapi | Clean SEC EDGAR company financials, ratios, filings and 10-K/10-Q sections as normalized JSON | apikey | Yes | unknown | unknown |
| EstimateTax | US federal, state and local income tax calculation for 2026, with the source of every figure | none | Yes | yes | unknown |
| FarmDash | DeFi intelligence, protocol risk, yield simulation plus 84 MCP agent tools, free Scout tier | apikey | Yes | yes | unknown |
| Fed Treasury | U.S. Department of the Treasury Data | none | Yes | unknown | alive |
| Filingrail | SEC EDGAR filings, XBRL financials, Form 4 insider trades, 8-K events and 13F holdings | apikey | Yes | unknown | unknown |
| Finance Clearly Tax Rates | Current UK and US tax rates, allowances and thresholds | none | Yes | yes | unknown |
| Financial Modeling Prep | Realtime and historical stock data | apikey | Yes | unknown | alive |
| FinBridge | Official-source financials, segments, valuation, peers and prices for KR, US, JP, TW companies | apikey | Yes | yes | unknown |
| Finnhub | Real-Time RESTful APIs and Websocket for Stocks, Currencies, and Crypto | apikey | Yes | unknown | alive |
| FRED | Economic data from the Federal Reserve Bank of St. Louis | apikey | Yes | yes | alive |
| Front Accounting APIs | Front accounting is multilingual and multicurrency software for small businesses | oauth | Yes | yes | alive |
| Futures Clock | Trading hours and session windows for 65 futures products on 16 global exchanges | none | Yes | yes | unknown |
| FXNewsBias | AI-scored news sentiment for the 8 major forex currencies, refreshed every 3 hours | apikey | Yes | yes | unknown |
| Goldprice.dev | Cross-validated gold, silver & copper spot, futures & 30-year history in 13 currencies | none | Yes | unknown | unknown |
| Halal Terminal | Shariah-compliant stock and ETF screening across 5 methodologies, zakat and purification | apikey | Yes | yes | unknown |
| Helious | US Treasury auction results with the tail and bidder split, plus scored economic releases | none | Yes | yes | unknown |
| Hotstoks | Stock market data powered by SQL | apikey | Yes | yes | dead |
| IBAN Analyzer | Resolve an IBAN to its bank name, BIC, city and address for 60+ countries | none | Yes | yes | unknown |
| IBANforge | IBAN validation and BIC/SWIFT lookup for 75+ countries with 121K+ bank entries | none | Yes | yes | unknown |
| IEX Cloud | Realtime & Historical Stock and Market Data | apikey | Yes | yes | dead |
| IG | Spreadbetting and CFD Market Data | apikey | Yes | unknown | alive |
| Indian Mutual Fund | Get complete history of India Mutual Funds Data | none | Yes | unknown | alive |
| Klarna | Klarna payment and shopping service | apikey | Yes | unknown | dead |
| KmalServico Gold Price Dataset | Current gold price per gram at 6 purities for 188 countries, JSON, no auth | none | Yes | no | unknown |
| LiquiLens | Public-record bank and lender failure-risk evidence | none | Yes | yes | unknown |
| Marketstack | Real-Time, Intraday & Historical Market Data API | apikey | Yes | unknown | alive |
| MercadoPago | Mercado Pago API reference - all the information you need to develop your integrations | apikey | Yes | unknown | alive |
| Moov | The Moov API makes it simple for platforms to send, receive, and store money | apikey | Yes | unknown | alive |
| Nordigen | Connect to bank accounts using official bank APIs and get raw transaction data | apikey | Yes | unknown | dead |
| NORTH7 Agent | Trading signals, market analysis and geopolitical intelligence | apikey | Yes | yes | unknown |
| OpenFIGI | Equity, index, futures, options symbology from Bloomberg LP | apikey | Yes | yes | alive |
| PIT Financial State | Point-in-time quarterly revenue for 20 U.S. issuers | apikey | Yes | unknown | unknown |
| Plaid | Connect with user's bank accounts and access transaction data | apikey | Yes | unknown | unknown |
| PolyKal Fees | Kalshi & Polymarket trading fee rates and formulas as verified JSON | none | Yes | yes | unknown |
| Razorpay IFSC | Indian Financial Systems Code (Bank Branch Codes) | none | Yes | unknown | alive |
| Real Time Finance | Websocket API to access realtime stock data | apikey | No | unknown | alive |
| Sales Tax Calculator | Computes exact sales tax amounts and breakdowns for checkout and billing | apikey | Yes | yes | unknown |
| SEC EDGAR Data | API to access annual reports of public US companies | none | Yes | yes | alive |
| SmartAPI | Gain access to set of <SmartAPI> and create end-to-end broking services | apikey | Yes | unknown | alive |
| StockData | Real-Time, Intraday & Historical Market Data, News and Sentiment API | apikey | Yes | yes | alive |
| StockFit | SEC filings, financial statements, earnings, ETF holdings and ownership data | apikey | Yes | yes | unknown |
| Sugra | One API for market data, economics, commodities, climate, and global news. LLM-ready JSON | apikey | Yes | yes | unknown |
| Tax Data API | Instant VAT number and tax validation across the globe | apikey | Yes | unknown | alive |
| Top 5 Stocks | Daily AI-ranked stock and crypto watchlists | none | Yes | unknown | unknown |
| Tradier | US equity/option market data (delayed, intraday, historical) | oauth | Yes | yes | alive |
| US Mortgage Calculator | Mortgage payment, amortization, affordability and 50-state property tax data | none | Yes | yes | unknown |
| VAT Validation | Validate VAT numbers and calculate VAT rates | apikey | Yes | yes | alive |
| VoxOdds | Polymarket and Kalshi odds, all-in executable quotes, EV checks and audited forecast scores | none | Yes | no | unknown |
| WallstreetBets | WallstreetBets Stock Comments Sentiment Analysis | none | Yes | unknown | alive |
| XFINLAB | Market events, sentiment, technical analysis and macro data for stocks | apikey | Yes | unknown | unknown |
| XOOMAR | US market data from SEC, FINRA, CFTC and the Fed: filings, insiders, earnings dates, short interest | none | Yes | yes | unknown |
| Yahoo Finance | Real time low latency Yahoo Finance API for stock market, crypto currencies, and currency exchange | apikey | Yes | yes | dead |
| YNAB | Budgeting & Planning | oauth | Yes | yes | alive |
| Zelothorn | Plain-English explanations of US public companies with SEC filings and earnings data | none | Yes | yes | unknown |
| Zoho Books | Online accounting software, built for your business | oauth | Yes | unknown | alive |
22 of these APIs require no authentication — you can start making requests immediately without signing up for an account. Just pick one from the table above, check its documentation, and send your first request.
40 APIs in this category require a free API key. This usually means creating a free account on the provider's website and copying your key from the dashboard. The process typically takes less than a minute.
Not sure where to start? Look for APIs marked as "alive" in the status column — these were recently verified as working. For browser-based projects, check that the API supports CORS.
Yes, all APIs listed on API Bouncer have a free tier. Some are completely open (no sign-up needed), while others require a free account to get an API key. Free tiers typically have rate limits — check each API's documentation for specifics.
It depends on your needs. Consider: Do you need authentication or prefer no-auth? Does your project need CORS support for browser access? How many requests will you make? Start with a no-auth API to prototype quickly, then switch to a more feature-rich option if needed.
We run periodic health checks on all listed APIs. The "Status" column shows whether each API was responding at our last check. APIs marked as "alive" were recently verified. You can also test any API yourself using curl or our guides on testing APIs.
Most free APIs allow commercial use, but terms vary by provider. Always check the specific API's terms of service. Some APIs have separate free and commercial tiers with different rate limits.
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