QuiVad
Net short positions disclosed to 23 market regulators, fund by fund, since 2010
Finance · No auth · HTTPS
Finance APIs
Page 1 of 10
Ordered by reported HTTPS, CORS support, no-auth access, then changed/observed facts. Access signals are not a popularity or quality score.
Nigeria PAYE
Nigerian income tax (PAYE) and take-home pay under the Nigeria Tax Act 2025
Finance · No auth · HTTPS
Seiche
Free public funding, FX and capital-market evidence with source clocks
Finance · No auth · HTTPS
Undertow
Public market-depth and sized exit estimates, not executable quotes
Finance · No auth · HTTPS
CardBinCheck
Card BIN/IIN lookup: network, issuer, country and card type for the first 6-8 digits
Finance · No auth · HTTPS
India GST HSN & SAC
Indian GST HSN and SAC classification code lookup and search
Finance · No auth · HTTPS
TickerInside
Holdings of every US ETF, which ETFs hold a stock, and overlap between funds, each dated
Finance · No auth · HTTPS
FloorGuard
Sourced prop firm daily-loss and max-drawdown rules, plus a drawdown-room check
Finance · No auth · HTTPS
Brainy Prices
UAE living costs: KHDA fees, DLD rents, fuel, utilities, telecom and relocation, with dated sources
Finance · No auth · HTTPS
contix
Spain: IBAN validation with bank and BIC, EU VAT number check (VIES), Modelo 303 VAT sums
Finance · No auth · HTTPS
PolyKal Fees
Kalshi & Polymarket trading fee rates and formulas as verified JSON
Finance · No auth · HTTPS
Finance Clearly Tax Rates
Current UK and US tax rates, allowances and thresholds
Finance · No auth · HTTPS
aikstockdata
KOSPI/KOSDAQ/KONEX daily settled closes, DART filings with receipt times, quarterly earnings
Finance · No auth · HTTPS
AlphaSMO
SEC 13F institutional holdings, Form 4 insider trading, and smart money convergence signals
Finance · No auth · HTTPS
Congressional Stock Brain
AI-powered tool scoring U.S. STOCK Act lawmaker trade disclosures for retail investors
Finance · No auth · HTTPS
FilingFirehose
Structured SEC EDGAR filings with body-text-classified 8-Ks, activist-tagged 13D/G, and ATM-offering detection in S-3 / 424B5
Finance · No auth · HTTPS
KeepRule
Investment principles and quotes from Buffett, Munger & more
Finance · No auth · HTTPS
MyPayslip.lk
Sri Lanka APIT, EPF, ETF, stamp duty and net salary calculations
Finance · No auth · HTTPS
Open Economics
Normalized Brazilian economic series from BCB and IBGE
Finance · No auth · HTTPS
Polish Bank Branches
Polish bank branch lookup by 8-digit clearing number (Numer Rozliczeniowy) or full 26-digit IBAN, free, no API key
Finance · No auth · HTTPS
PredScope
Free prediction market odds and analytics data from Polymarket
Finance · No auth · HTTPS
The Gold Barometer
Daily gold buying-conditions score, 0-100, with open history back to 1971
Finance · No auth · HTTPS
ValueRay
Quantitative and sentiment data for stocks and ETFs
Finance · No auth · HTTPS
XOOMAR
US market data from SEC, FINRA, CFTC and the Fed: filings, insiders, earnings dates, short interest
Finance · No auth · HTTPS