>_ best Free Data APIs tools
The 28 top free data apis tools in the index, ranked by upvotes.
- 01.TradeOdds— Analyzes historical patterns by matching current market conditions against 30+ years of data across 2,000+ stocks, ETFs, and crypto to calculate base rates for specific moves.
- 02.FRED MCP Server— Provides MCP server access to 800,000+ Federal Reserve Economic Data time series with built-in transformations, search, and browsing capabilities for AI assistants and developers.
- 03.Billionr— Provides authenticated CLI access to proprietary options signals, squeeze setups, ticker history, and a Risk-on/Risk-off gauge informed by The Tao of Trading philosophy.
- 04.CEOInterviews.AI— Provides 250,000+ verified, speaker-attributed transcripts of executive podcasts, TV interviews, and conference talks, joined to companies and tickers, from 2006 to present.
- 05.Finsheet— Provides 30+ years of market data, stock fundamentals, and ETF holdings via Excel and Google Sheets add-ons with real-time streaming capability.
- 06.FINRA Tools and Calculators— Provides free regulatory tools for verifying broker licenses, researching arbitration awards, analyzing fund fees, and accessing fixed income and equity market data alongside retirement and loan calculators
- 07.Arkolith— Provides SEC 13F institutional holdings, Form 4 insider trades, and congressional disclosures through MCP and REST API with per-datapoint provenance to primary SEC filings.
- 08.AltIndex— Aggregates alternative data signals including Reddit mentions, web traffic, app downloads, job postings, and sentiment across 2,527+ stocks, ETFs, and cryptocurrencies with AI-powered scoring and alerts.
- 09.AltIndex— Tracks social media mentions, sentiment, and alternative data signals across Reddit, Twitter, and other platforms for 2,500+ stocks, ETFs, and cryptocurrencies with historical time series and real-time alerts
- 10.Barchart— Provides real-time market data, charting tools, screeners, news, and analysis across equities, futures, options, ETFs, commodities, and currencies with customizable workflows.
- 11.Activ8 Insights— Tracks activist short seller reports, ranks investigators by verified stock impact, and provides forensic scoring on targeted companies with real-time alerts.
- 12.AskEdgar— Extracts structured data from SEC filings in real time, monitors dilution events, offerings, registrations, and compliance status, delivering proprietary datasets and alerts via API and web platform.
- 13.Itô Research Grant— Provides free authenticated API access to prediction market data, basket analytics, and hosted backtesting infrastructure for researchers and academics.
- 14.StockAInsights— Extracts financial data and metrics from SEC filings using multi-strategy AI trained on industry-specific patterns, delivering 12+ years of standardized statements, ratios, and AI-generated investment narratives.
- 15.EODHD— Provides REST and WebSocket financial data APIs covering 60+ exchanges, 150K+ tickers, 30 years of historical EOD/intraday prices, fundamentals, options, forex, crypto, and macroeconomic indicators
- 16.Twelve Data— Provides REST API and WebSocket access to real-time and historical market data for stocks, forex, crypto, ETFs, commodities, and fundamentals across 250+ exchanges.
- 17.StockMarketScan— Provides 24 curated stock screeners covering technical, momentum, fundamental, and dividend setups with unusual options activity data and API access.
- 18.Quiver Quantitative— Aggregates alternative data on congressional trading, insider transactions, hedge fund activity, lobbying, government contracts, and corporate political contributions for equity research.
- 19.CoinGecko— Provides real-time and historical cryptocurrency prices, market data, charts, and fundamental analysis across 17,000+ coins, NFT collections, and exchanges
- 20.Earnings API— Provides REST API access to historical and upcoming earnings calendar data for NYSE and NASDAQ stocks with date-based queries, post-earnings reactions, and structured JSON responses for automated workflows.
- 21.Alpha Vantage— Provides realtime and historical financial market data via REST APIs covering stocks, ETFs, mutual funds, options, forex, commodities, economic indicators, and technical indicators with 20+ years of historical depth
- 22.Homesage.ai— Provides AI-powered investment property search, property analysis reports, and real estate data APIs covering 150M+ US residential properties with computer vision-driven renovation estimates and investment scoring.
- 23.Zillow Research— Provides downloadable CSV datasets and interactive dashboards covering US home values, rental prices, inventory, sales, affordability, and market forecasts at national, metro, and county granularity.
- 24.Quantcha— Provides options trade search, screening, analysis, portfolio management, and proprietary options data through a web platform and API.
- 25.Tiingo— Provides financial market data APIs covering equities, ETFs, crypto, forex, and fundamentals with historical and real-time access.
- 26.WhaleWisdom— Tracks institutional investor 13F filings, insider transactions, 13D/13G disclosures, and mutual fund holdings with backtesting and portfolio replication tools
- 27.Jay R. Ritter IPO Data— Provides comprehensive historical IPO datasets covering US and international markets from 1975-2025, including underpricing statistics, underwriter rankings, founding dates, VC-backing status, and long-run returns for academic research.
- 28.Kwants— Provides a self-hosted Python library for downloading Polygon flat-file data, building point-in-time ticker universes with adjustments, and running backtests against 1m/5m/daily bars using a declarative DSL for entry/exit conditions.
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