Finance – Free-tier APIs
89 Free-tier APIs in the category Finance. Free public web APIs that developers and AI agents can call. Entries come from the open public-apis list; each link was checked automatically (HTTP status) on the date shown, which says the site responded, not that the API is good.
Aletheia
Insider trading data, earnings call analysis, financial statements, and more
Alpaca
Realtime and historical market data on all US equities and ETFs
Alpha Vantage
Realtime and historical stock data
Arkleon
Point-in-time SEC EDGAR fundamentals over /v1
Bank Data
Instant IBAN and SWIFT number validation across the globe
Banking Access Index
Which US business banking providers accept founders by country of residence, with sources
Billplz
Payment platform
Binlist
Public access to a database of IIN/BIN information
Boleto.Cloud
A api to generate boletos in Brazil
Brainy Prices
UAE living costs: KHDA fees, DLD rents, fuel, utilities, telecom and relocation, with dated sources
BriefTape
Real-time AI-summarized SEC filings, Fed, FDA and BLS data, ticker-tagged
CardBinCheck
Card BIN/IIN lookup: network, issuer, country and card type for the first 6-8 digits
Citi
All Citigroup account and statement data APIs
CongressInvests
Real-time U.S. congressional stock trade disclosures from Senate EFD and House Clerk
contix
Spain: IBAN validation with bank and BIC, EU VAT number check (VIES), Modelo 303 VAT sums
Degenscan Intel Macro
U.S. Treasury auctions, stablecoin supply, Brazil crypto-dollar premium vs BCB PTAX; free trial key
Drillr
Fundamentals, filings, earnings, ownership and events for US, China and Japan equities
Econdb
Global macroeconomic data
EconPulse
Live economic data — CPI, PPI, energy, treasury rates, BTC premium
EOD Historical Data
Real-time and historical stock market data with 150+ exchanges
EstimateTax
US federal, state and local income tax calculation for 2026, with the source of every figure
FarmDash
DeFi intelligence, protocol risk, yield simulation plus 84 MCP agent tools, free Scout tier
Fed Treasury
U.S. Department of the Treasury Data
Filingrail
SEC EDGAR filings, XBRL financials, Form 4 insider trades, 8-K events and 13F holdings
Finage
Finage is a stock, currency, cryptocurrency, indices, and ETFs real-time & historical data provider
Finance Clearly Tax Rates
Current UK and US tax rates, allowances and thresholds
Financial Modeling Prep
Realtime and historical stock data
FinBridge
Official-source financials, segments, valuation, peers and prices for KR, US, JP, TW companies
Finnhub
Real-Time RESTful APIs and Websocket for Stocks, Currencies, and Crypto
FloorGuard
Sourced prop firm daily-loss and max-drawdown rules, plus a drawdown-room check
FRED
Economic data from the Federal Reserve Bank of St. Louis
Front Accounting APIs
Front accounting is multilingual and multicurrency software for small businesses
Futures Clock
Trading hours and session windows for 65 futures products on 16 global exchanges
FXNewsBias
AI-scored news sentiment for the 8 major forex currencies, refreshed every 3 hours
Goldprice.dev
Cross-validated gold, silver & copper spot, futures & 30-year history in 13 currencies
Halal Terminal
Shariah-compliant stock and ETF screening across 5 methodologies, zakat and purification
Helious
US Treasury auction results with the tail and bidder split, plus scored economic releases
Helium
News with media bias scoring, balanced news synthesis, live market data, AI options pricing
Hotstoks
Stock market data powered by SQL
IBAN Analyzer
Resolve an IBAN to its bank name, BIC, city and address for 60+ countries
IBANforge
IBAN validation and BIC/SWIFT lookup for 89 countries with 121k+ BIC entries
IG
Spreadbetting and CFD Market Data
India GST HSN & SAC
Indian GST HSN and SAC classification code lookup and search
Indian Mutual Fund
Get complete history of India Mutual Funds Data
Intrinio
A wide selection of financial data feeds
Klarna
Klarna payment and shopping service
LiquiLens
Public-record bank and lender failure-risk evidence
Live SEC Form 4 Insider Trades
Latest SEC Form 4 insider trading filings from EDGAR, by ticker or market-wide
Marketstack
Real-Time, Intraday & Historical Market Data API
matchwire.win
Matched prediction-market games across Kalshi, Polymarket US/Intl and Predict.fun
MercadoPago
Mercado Pago API reference - all the information you need to develop your integrations
Mono
Connect with users’ bank accounts and access transaction data in Africa
Moov
The Moov API makes it simple for platforms to send, receive, and store money
Nigeria PAYE
Nigerian income tax (PAYE) and take-home pay under the Nigeria Tax Act 2025
NORTH7 Agent
Trading signals, market analysis and geopolitical intelligence
OpenFIGI
Equity, index, futures, options symbology from Bloomberg LP
Pink Agentic AI Payments
Approval layer for AI agent payments: per-agent budgets, rules, single-use credentials, sandbox
Plaid
Connect with user's bank accounts and access transaction data
Polygon
Historical stock market data
PolyKal Fees
Kalshi & Polymarket trading fee rates and formulas as verified JSON
Portfolio Optimizer
Portfolio analysis and optimization
Razorpay IFSC
Indian Financial Systems Code (Bank Branch Codes)
Real Time Finance
Websocket API to access realtime stock data
Sales Tax Calculator
Computes exact sales tax amounts and breakdowns for checkout and billing
SEC EDGAR Data
API to access annual reports of public US companies
Segmara
IPO calendars, filing stages and estimated lockup dates
Seiche
Free public funding, FX and capital-market evidence with source clocks
SmartAPI
Gain access to set of <SmartAPI> and create end-to-end broking services
Stanza VAT Validator
Validate EU and UK VAT numbers with country formats, checksums, and VIES status
StockData
Real-Time, Intraday & Historical Market Data, News and Sentiment API
StockFit
SEC filings, financial statements, earnings, ETF holdings and ownership data
Styvio
Realtime and historical stock data and current stock sentiment
Sugra
One API for market data, economics, commodities, climate, and global news. LLM-ready JSON
Tax Data
Instant VAT number and tax validation across the globe
TickerInside
Holdings of every US ETF, which ETFs hold a stock, and overlap between funds, each dated
TickerLayer
Real-time and historical market data for stocks, forex, crypto and more
Top 5 Stocks
Daily AI-ranked stock and crypto watchlists
Tradier
US equity/option market data (delayed, intraday, historical)
Twelve Data
Stock market data (real-time & historical)
Undertow
Public market-depth and sized exit estimates, not executable quotes
US Mortgage Calculator
Mortgage payment, amortization, affordability and 50-state property tax data
VAT Validation
Validate VAT numbers and calculate VAT rates
VoxOdds
Polymarket and Kalshi odds, all-in executable quotes, EV checks and audited forecast scores
WallstreetBets
WallstreetBets Stock Comments Sentiment Analysis
XFINLAB
Market events, sentiment, technical analysis and macro data for stocks
XOOMAR
US market data from SEC, FINRA, CFTC and the Fed: filings, insiders, earnings dates, short interest
YNAB
Budgeting & Planning
Zelothorn
Plain-English explanations of US public companies with SEC filings and earnings data
Zoho Books
Online accounting software, built for your business