Top 76 Finance APIs For Developers
Finance
Abstract VAT Validation
Validate VAT numbers and calculate VAT rates.
Adanos
Stock and crypto sentiment from Reddit, X, financial news, and Polymarket.
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Learn moreSerpApi - Search API
SerpApi's Search API makes it easy and fast to scrape Google and other search engines.
Aegwah Actuals
Aegwah Actuals: as-filed GAAP EPS for S&P 500/400 with EDGAR accession on every row, plus BMO/AMC timing and Form 4. Free sample ZIP; REST API + bulk download.
Agent Toolbelt
AI-generated stock analysis (investment thesis, valuation, insider signal, earnings) from live fundamentals, as structured JSON.
Aletheia
Insider trading data, earnings call analysis, financial statements, and more.
Alpha Vantage
Realtime and historical stock data.
AlphaAI
AI-enriched financial & insider-trading news, scored for relevance.
AlphaSMO
SEC 13F institutional holdings, Form 4 insider trading, and smart money convergence signals. Free anonymous tier, no signup required.
AlQANAAS Gold Data
Live XAUUSD, country gold prices, and weekly gold research in JSON and CSV.
ArgentoFX
Real-time foreign exchange rates for Argentina.
Banco do Brasil
All Banco do Brasil financial transaction APIs.
Bargo Congress Trades
U.S. Congress STOCK Act stock trades with per-trade performance.
Billplz
Payment platform.
Binlist
Public access to a database of IIN/BIN information.
Boleto.Cloud
A api to generate boletos in Brazil.
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.
Casheva
Financial data for Argentina, Spain and Mexico: USD rates, inflation, Euribor, ICL.
Citi
All Citigroup account and statement data APIs.
DolarAPI
Real-time exchange rates for Latin American currencies.
Earnings Feed
SEC filings, insider transactions, institutional holdings.
Econdb
Global macroeconomic data.
eunormia E-Invoice API
Eunormia turns your invoice data into a ZUGFeRD/Factur-X PDF/A-3 per EN 16931 — and validates every result before it is delivered.
Fed Treasury
U.S. Department of the Treasury Data.
Finage
Finage is a stock, currency, cryptocurrency, indices, and ETFs real-time & historical data provider.
Financial Data
Stock market and financial data.
Financial Modeling Prep
Realtime and historical stock data.
FinFeedAPI
Developer-first market data API.
Finnhub
Real-Time RESTful APIs and Websocket for Stocks, Currencies, and Crypto.
FinSignals
Sentiment, direction & quality classification for Reddit financial social posts.
Guides
All guides- The State of Public APIs 2026: Data From 1,580 APIsWe measured all 1,580 public APIs in our directory. How many need a key, OAuth or nothing, which work from a browser, what is growing, and how many are down.
- REST API Naming Conventions: What 72 APIs DoWe read the OpenAPI specs of 72 public APIs and counted 3,852 endpoint paths. The naming conventions real APIs follow, where they disagree, and what to copy.
- API Rate Limiting: Handle 429s, Then Set Your OwnHow API rate limiting works from both sides: reading limit headers, backing off correctly from a 429 against real public APIs, and setting limits on your own.