Finance APIs cover market data, payments, banking, and accounting — from stock tickers and crypto rates to full payment rails like Stripe. Free tiers on market-data APIs typically delay quotes by 15 minutes; real-time access is where paid plans start. Verify authentication style early, since broker and banking APIs often require OAuth flows rather than simple API keys.
| API | Pricing | Auth | CORS | Health | |
|---|---|---|---|---|---|
| ATM Locator API ATM Locator API public API. | Paid | Unknown | Yes | Profile | |
| Abstract VAT Validation Validate VAT numbers and calculate VAT rates | Freemium | API Key | No | Profile | |
| Accounting API A flexible API for pulling accounting data, normalized and aggregated from 20 accounting integrations. Standardize how you connect to your customers’ accounting software. View, create, update, and delete data in the same | Unknown | Unknown | Yes | Profile | |
| Advicent.FactFinderService API An API for accessing the NaviPlan Fact Finder. | Unknown | Unknown | Yes | Profile | |
| Afterbanks API La estandarización de la conexión con cualquier banco en tiempo real. | Paid | Unknown | Yes | Profile | |
| Aletheia Insider trading data, earnings call analysis, financial statements, and more | Freemium | API Key | Yes | Profile | |
| Alpaca API Alpaca Market Data and Trading APIs for commission-free stock and crypto trading with REST and WebSocket streaming for algorithmic strategies. | Freemium | OAuth | No | Profile | |
| Alpaca API 2 Realtime and historical market data on all US equities and ETFs | Unknown | API Key | Yes | Profile | |
| Alpha Vantage Realtime and historical stock data | Freemium | API Key | Yes | Profile | |
| Apidapp ApiDapp API Apidapp ApiDapp API public API. | Paid | API Key | Yes | Profile | |
| ArgentoFX Real-time foreign exchange rates for Argentina | Free | No | No | Profile | |
| Assess API Codat's Assess API enable you to make smarter credit decisions on your small business customers. Assess enriches your customer's accounting, commerce and banking data to surface actionable insights you didn't have before | Unknown | Unknown | Yes | Profile | |
| Banco do Brasil All Banco do Brasil financial transaction APIs | Free | OAuth | Unknown | Profile | |
| Banco do Brasil API All Banco do Brasil financial transaction APIs | Unknown | Unknown | Yes | Profile | |
| Bank Data API Instant IBAN and SWIFT number validation across the globe | Free | API Key | Unknown | Profile | |
| Big Red Cloud API <div style='line-height: 30px;'> <strong>Welcome to the Big Red Cloud API</strong><br/> This API enables programmatic access to Big Red Cloud data.<br/> We have used Swagger to auto generate the API documentation on this | Unknown | Unknown | Yes | Profile | |
| Binlist Public access to a database of IIN/BIN information | Free | No | Yes | Profile | |
| BriefTape API Real-time AI-summarized SEC filings, Fed, FDA and BLS data, ticker-tagged | Free | API Key | Yes | Profile | |
| Bullbear Advisors See strong buy and sell signals the day they occur. Get today's stocks that closed with a strong Bullish or Bearish candlestick. | Paid | No | No | Profile | |
| Citi All Citigroup account and statement data APIs | Paid | API Key | No | Profile | |
| Cnab Online API Processe arquivos de retorno CNAB | Unknown | Unknown | Yes | Profile | |
| Codat Expense API The API for Sync for Expenses. Sync for Expenses is an API and a set of supporting tools. It has been built to enable corporate card and expense management platforms to provide high-quality integrations with multiple acc | Unknown | Unknown | Yes | Profile | |
| DolarAPI Real-time exchange rates for Latin American currencies | Free | No | Yes | Profile | |
| EODHD API EOD Historical Data API for end-of-day and intraday stock prices across 60+ exchanges, fundamentals, dividends, splits, and macro indicators. | Paid | API Key | No | Profile | |
| Econdb Global macroeconomic data | Free | No | Yes | Profile | |
| FRED Economic data from the Federal Reserve Bank of St. Louis | Free | API Key | No | Profile | |
| Fed Treasury U.S. Department of the Treasury Data | Free | No | No | Profile | |
| FinFeedAPI Developer-first market data API | Freemium | API Key | No | Profile | |
| Finage Finage is a stock, currency, cryptocurrency, indices, and ETFs real-time & historical data provider | Freemium | API Key | No | Profile | |
| Financial Data Stock market and financial data API with real-time quotes, historical data, and fundamentals | Freemium | API Key | No | Profile | |
| Financial Modeling Prep Realtime and historical stock data | Freemium | API Key | No | Profile | |
| Finnhub Real-Time RESTful APIs and Websocket for Stocks, Currencies, and Crypto | Freemium | API Key | Yes | Profile | |
| Front Accounting APIs Front accounting is multilingual and multicurrency software for small businesses | Free | OAuth | No | Profile | |
| IBANAPI OpenApi Documentation API IBANAPI OpenApi documentation | Paid | API Key | Yes | Profile | |
| IBKR 3rd Party Web API Interactive Brokers Web API for 3rd Party Companies | Paid | Unknown | Yes | Profile | |
| IG Spreadbetting and CFD Market Data | Paid | API Key | Yes | Profile | |
| IIN API IIN API allows you to accurately identify the issuing bank, card type, country of origin, and other details from a credit or debit card number. This is essential for fraud prevention, payment processing, and customer verification. | Freemium | API Key | No | Profile | |
| Indian Mutual Fund Get complete history of India Mutual Funds Data | Free | No | No | Profile | |
| Intrinio A wide selection of financial data feeds | Freemium | API Key | No | Profile | |
| KYC API Documentation API API Interface to retrieve company data and products from business registers | Paid | Unknown | Yes | Profile | |
| Kite Connect Stock market investment and trading platform | Freemium | API Key | No | Profile | |
| Marketstack API Real-Time, Intraday & Historical Market Data API | Unknown | API Key | Unknown | Profile | |
| Modern Treasury API Payment operations API for ledgers, payments, counterparties, accounts, and reconciliation. | Freemium | API Key | Yes | Profile | |
| Mono Connect with users’ bank accounts and access transaction data in Africa | Freemium | API Key | No | Profile | |
| Nordigen Account Information Services API Nordigen Account Information Services API public API. | Unknown | Unknown | Yes | Profile | |
| OpenFIGI Equity, index, futures, options symbology from Bloomberg LP | Free | API Key | No | Profile | |
| ParityVend Globalize your business by auto-adapting pricing for each visitor with Purchasing Power Parity | Freemium | API Key | No | Profile | |
| Plaid Connect with user's bank accounts and access transaction data | Paid | API Key | No | Profile | |
| PocketSmith API The PocketSmith API | Unknown | Unknown | Yes | Profile | |
| Polygon Historical stock market data | Paid | API Key | No | Profile | |
| Polygon.io API Polygon.io APIs for US stocks, options, forex, and crypto: real-time and historical aggregates, tickers, trades, quotes, and reference data. | Freemium | API Key | No | Profile | |
| Portfolio Optimizer Portfolio analysis and optimization | Free | No | Yes | Profile | |
| Ramp API Spend management API for cards, transactions, reimbursements, vendors, bills, and accounting. | Freemium | API Key | Yes | Profile | |
| Razorpay IFSC Indian Financial Systems Code (Bank Branch Codes) | Free | No | Yes | Profile | |
| Real Time Finance Websocket API to access realtime stock data | Free | API Key | No | Profile | |
| Realie Property Data API Realie's property data is directly sourced from local municipalities and contains over 100 data fields. Realie covers the entire USA with 180 million parcels. | Freemium | API Key | No | Profile | |
| Reimbursements API Reimbursements API public API. | Unknown | Unknown | Yes | Profile | |
| SEC EDGAR Data API to access annual reports of public US companies | Free | No | No | Profile | |
| Sinao API Sinao API for account management, apps administration and network exploration | Unknown | Unknown | Yes | Profile | |
| SmartAPI Indian stock broking API for automated trading, market data, and portfolio management via Angel Broking | Paid | API Key | No | Profile | |
| StockData Real-Time, Intraday & Historical Market Data, News and Sentiment API | Freemium | API Key | No | Profile | |
| Storecove API Storecove API | Unknown | Unknown | Yes | Profile | |
| The Consumer Financial Protection Bureau API Learn more about home mortgage data, download the data yourself, or build new tools using our API. | Unknown | Unknown | Yes | Profile | |
| TokenJay API services API Please see usage policies on tokenjay.app | Unknown | Unknown | Yes | Profile | |
| TradeWatch Real time financial market data | Paid | API Key | No | Profile | |
| Tradier US equity/option market data (delayed, intraday, historical) | Freemium | OAuth | Yes | Profile | |
| Trading View Market price, charting, and technical analysis platform for stocks, forex, and crypto traders | Paid | OAuth | No | Profile | |
| Twelve Data Stock market data (real-time & historical) | Freemium | API Key | No | Profile | |
| Twelve Data API Twelve Data financial market data API covering stocks, ETFs, forex, and crypto with real-time and historical time series plus technical indicators. | Freemium | API Key | No | Profile | |
| Up Com Au Up API The Up API gives you programmatic access to your balances and transaction data. You can request past transactions or set up webhooks to receive real-time events when new transactions hit your account. It’s new, it’s exci | Unknown | API Key | Yes | Profile | |
| Validate IBAN API This API lets you quickly validate IBAN bank codes | Freemium | API Key | No | Profile | |
| Validate Swift/BIC Validates BIC/SWIFT code | Free | API Key | No | Profile | |
| Vatapi VAT API A developer friendly API to help your business achieve VAT compliance | Paid | Unknown | Yes | Profile | |
| WallstreetBets WallstreetBets Stock Comments Sentiment Analysis | Freemium | No | No | Profile | |
| Xero Payroll AU API This is the Xero Payroll API for orgs in Australia region. | Paid | Unknown | Yes | Profile | |
| YNAB Personal budgeting and financial planning API for tracking expenses, managing budgets, and achieving financial goals | Paid | OAuth | No | Profile | |
| Zoho Books Online accounting software, built for your business | Paid | OAuth | No | Profile | |
| xChangeApi Exchange rates & real time market data | Freemium | API Key | No | Profile |
Start with pricing and auth: free tiers and no-auth APIs are fastest to prototype with. Then check CORS if your app calls the API from the browser, and health before you commit — a great API that's been down for a week will block your launch. Each profile below shows all of these signals plus rate limits where documented.