>_ best Free Data APIs tools
The 21 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.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.
- 04.Barchart— Provides real-time market data, charting tools, screeners, news, and analysis across equities, futures, options, ETFs, commodities, and currencies with customizable workflows.
- 05.Activ8 Insights— Tracks activist short seller reports, ranks investigators by verified stock impact, and provides forensic scoring on targeted companies with real-time alerts.
- 06.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.
- 07.Itô Research Grant— Provides free authenticated API access to prediction market data, basket analytics, and hosted backtesting infrastructure for researchers and academics.
- 08.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.
- 09.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
- 10.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.
- 11.StockMarketScan— Provides 24 curated stock screeners covering technical, momentum, fundamental, and dividend setups with unusual options activity data and API access.
- 12.Quiver Quantitative— Aggregates alternative data on congressional trading, insider transactions, hedge fund activity, lobbying, government contracts, and corporate political contributions for equity research.
- 13.CoinGecko— Provides real-time and historical cryptocurrency prices, market data, charts, and fundamental analysis across 17,000+ coins, NFT collections, and exchanges
- 14.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.
- 15.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.
- 16.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.
- 17.Quantcha— Provides options trade search, screening, analysis, portfolio management, and proprietary options data through a web platform and API.
- 18.Tiingo— Provides financial market data APIs covering equities, ETFs, crypto, forex, and fundamentals with historical and real-time access.
- 19.WhaleWisdom— Tracks institutional investor 13F filings, insider transactions, 13D/13G disclosures, and mutual fund holdings with backtesting and portfolio replication tools
- 20.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.
- 21.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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