Banking Access Index
Finance
Which US business banking providers accept founders by country of residence, with sources
No keyCORSHTTPS
Free Finance APIs
Market data, company fundamentals, banking and payment services.
141 listed · 43 need no key · 47 work in the browser
Binlist
Finance
Public access to a database of IIN/BIN information
No keyCORSHTTPS
Congressional Stock Brain
Finance
AI-powered tool scoring U.S. STOCK Act lawmaker trade disclosures for retail investors
No keyCORSHTTPS
Econdb
Finance
Global macroeconomic data
No keyCORSHTTPS
EstimateTax
Finance
A REST API designed for calculating US federal, state, and local income taxes for the year 2026. It provides deterministic responses with source attribution, requires no API key, and allows up to 60 requests per minute from a single address.
No keyCORSHTTPS
FilingFirehose
Finance
Structured SEC EDGAR filings with body-text-classified 8-Ks, activist-tagged 13D/G, and ATM-offering detection in S-3 / 424B5
No keyCORSHTTPS
Futures Clock
Finance
Trading hours and session windows for 65 futures products on 16 global exchanges
No keyCORSHTTPS
Helious
Finance
US Treasury auction results with the tail and bidder split, plus scored economic releases
No keyCORSHTTPS
Helium
Finance
News with media bias scoring, balanced news synthesis, live market data, AI options pricing
No keyCORSHTTPS
LiquiLens
Finance
Public-record bank and lender failure-risk evidence
No keyCORSHTTPS
MyPayslip.lk
Finance
Sri Lanka APIT, EPF, ETF, stamp duty and net salary calculations
No keyCORSHTTPS
Portfolio Optimizer
Finance
Portfolio analysis and optimization
No keyCORSHTTPS
PredScope
Finance
Free prediction market odds and analytics data from Polymarket
No keyCORSHTTPS
The Gold Barometer
Finance
Daily gold buying-conditions score, 0-100, with open history back to 1971
No keyCORSHTTPS
US Mortgage Calculator
Finance
Mortgage payment, amortization, affordability and 50-state property tax data
No keyCORSHTTPS
Zelothorn
Finance
Plain-English explanations of US public companies with SEC filings and earnings data
No keyCORSHTTPS
aikstockdata
Finance
KOSPI/KOSDAQ/KONEX daily settled closes, DART filings with receipt times, quarterly earnings
No keyHTTPS
AlphaSMO
Finance
SEC 13F institutional holdings, Form 4 insider trading, and smart money convergence signals
No keyHTTPS
Brainy Prices
Finance
UAE living costs: KHDA fees, DLD rents, fuel, utilities, telecom and relocation, with dated sources
No keyCORSHTTPS
CardBinCheck
Finance
Card BIN/IIN lookup: network, issuer, country and card type for the first 6-8 digits
No keyCORSHTTPS
contix
Finance
Spain: IBAN validation with bank and BIC, EU VAT number check (VIES), Modelo 303 VAT sums
No keyCORSHTTPS
Fed Treasury
Finance
U.S. Department of the Treasury Data
No keyHTTPS
Finance Clearly Tax Rates
Finance
Current UK and US tax rates, allowances and thresholds
No keyHTTPS
FloorGuard
Finance
Sourced prop firm daily-loss and max-drawdown rules, plus a drawdown-room check
No keyCORSHTTPS
All 141 Finance APIs
- Banking Access Index
- Binlist
- Congressional Stock Brain
- Econdb
- EstimateTax
- FilingFirehose
- Futures Clock
- Helious
- Helium
- LiquiLens
- MyPayslip.lk
- Portfolio Optimizer
- PredScope
- The Gold Barometer
- US Mortgage Calculator
- Zelothorn
- aikstockdata
- AlphaSMO
- Brainy Prices
- CardBinCheck
- contix
- Fed Treasury
- Finance Clearly Tax Rates
- FloorGuard
- Goldprice.dev
- IBAN Analyzer
- India GST HSN & SAC
- Indian Bank Data API
- Indian Mutual Fund
- KeepRule
- KmalServico Gold Price Dataset
- Open Economics
- Polish Bank Branches
- PolyKal Fees
- Razorpay IFSC
- Razorpay IFSC
- SEC EDGAR Data
- TickerInside
- Top 5 Stocks
- ValueRay
- VoxOdds
- WallstreetBets
- XOOMAR
- Agent Toolbelt
- Aletheia
- Alpha Vantage
- AlphaAI
- ArgentinaDatos API
- Banco do Brasil
- Billplz
- BriefTape
- CongressInvests
- Drillr
- FarmDash
- Filingrail
- Finnhub
- IBANforge
- IEX Cloud
- IG
- Municipal Finance API
- NORTH7 Agent
- Sales Tax Calculator
- Stock Sentiment
- Tradier
- XFINLAB
- Yahoo Finance
- 2026 Tax Figures API
- Alpaca
- Aptologia Datos Abiertos
- Bank Data
- Bank Logos API
- Barchart OnDemand
- Boleto.Cloud
- Citi
- CommodityPriceAPI
- CoworkingView API
- Dino.markets
- Earnings Feed
- EconPulse
- EOD Historical Data
- Factoring Price Index
- Filingrail
- Finage
- Financial Data
- Financial Data API
- Financial Evidence API
- Financial Modeling Prep
- FinBridge
- FinSignals API
- FRED
- Front Accounting APIs
- FXMacroData API
- FXNewsBias
- GCC Corporate Tax
- Halal Terminal
- Hotstoks
- IBAN Validation API
- IEX
- Intrinio
- Invoice Extraction API
- Klarna
- Market Data API
- Mboum API
- MercadoPago
- Mono
- Moov
- Newswire Firehose API
- Nordigen
- Open Banking API
- OpenFIGI
- Pink Agentic AI Payments
- PIT Financial State
- Plaid
- Pokémon TCG API
- Polygon
- Polygon.io
- Real Time Finance
- Segmara
- Shodan EntityDB API
- SmartAPI
- Stanza VAT Validator
- StockData
- StockFit
- Styvio
- Sugra
- Tax Data
- The Bell API
- TickerLayer
- Twelve Data
- UK CGT Rates
- VAT Validation
- World Trading Data
- x402 List API
- YAML Yugi
- YNAB
- Yu-Gi-Oh! API
- Yugi Limit Regulation API
- Zoho Books
- Arkleon
- Live SEC Form 4 Insider Trades
- matchwire.win
Free Finance APIs — common questions
Counts and timings below come from our own scheduled checks of this category.
How many free finance APIs are there?
We track 141 in this category, of which 118 responded at our last check. 43 of them need no API key.
Which finance APIs work without an API key?
43 of the 141 entries here need no credential. Filter this page by "no key" to see them, or browse the no-key collection for every keyless API across all categories.
Can I use these finance APIs in a browser app?
22 entries in this category need no key and return CORS headers, which is the combination that lets you call them straight from client-side JavaScript. The rest need a server or a proxy in between.
Which is the fastest free finance API?
Of the keyless options that responded at our last check, Portfolio Optimizer was quickest at a median 354 ms. Speed is only one factor — coverage and licensing usually matter more — but it is measured here rather than claimed.
How do you know these APIs still work?
We call every listing on a schedule and record the status code, response time and whether CORS headers came back. Those results drive the badges on this page. Across the whole catalogue, 361 of 3,005 entries were not responding at the last full run, which is the sort of thing an unchecked list never tells you.