Best Free APIs & Data Feeds Tools for Investors

SEC EDGAR - Company Filings (Full‑Text Search & Search Filings)

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SEC EDGAR Search is the official free source for U.S. public company, fund, insider, ownership, prospectus, and XBRL filing research. It is strongest as the source of truth for SEC filings, full-text search, latest filings, RSS feeds, CIK lookup, and data.sec.gov JSON APIs, but raw filings still require parsing and automated access must follow SEC fair-access rules.

SEC.gov (EDGAR)

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SEC.gov EDGAR is the official free source for U.S. public-company filings, fund filings, insider forms, 13F reports, full-text filing search, RSS feeds, bulk archives, and no-key public JSON APIs. It is the baseline source for filings research and data validation, but it is raw official infrastructure rather than a polished commercial research terminal.

TipRanks

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TipRanks is an investment research platform built around analyst ratings, price targets, expert rankings, Smart Score, AI stock analysis, news sentiment, insider signals, hedge-fund activity, and portfolio tools. It is strongest for investors who want to compare market opinions and stock forecasts quickly, with Premium and Ultimate unlocking more of the expert, portfolio, export, and AI workflow.

Uncle Stock

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Uncle Stock is a global fundamental stock screener and screener-backtesting platform for DIY and value investors who want many financial metrics, guru-style screens, watchlists, historical backtests, CSV export, and AI/MCP stock-search access. It is strongest for long-term fundamental screening and value research, while API access, advanced backtesting, exports, crypto coverage, and unlimited MCP usage are gated to higher plans.

Unusual Whales

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Unusual Whales is an options-flow and market-activity platform for traders who want real-time U.S. options trades, dark pool/off-exchange activity, alerts, screeners, news, congressional trading data, and developer API access. It is strongest for alert-driven options and order-flow research, with portfolio tracking, API, WebSocket streaming, and historical full-market options data handled through separate paid surfaces.

Ahrefs

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Ahrefs is an SEO and marketing intelligence platform that investors can use as alternative data for digital businesses, marketplaces, publishers, SaaS companies, and consumer brands where search visibility and web demand matter. It is strongest for website traffic estimates, keyword demand, backlinks, content visibility, API exports, and AI-brand visibility, but it is not an investing terminal, valuation model, portfolio tracker, or source of official company fundamentals.

Alpha Vantage

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Alpha Vantage is an API-first financial data provider for developers, students, quants, and analysts who need a simple API key for stock, ETF, mutual fund, FX, crypto, options, commodities, fundamentals, news, sentiment, and macroeconomic datasets. It is strongest for learning, prototypes, spreadsheets, and personal API workflows, but the free quota is small, premium endpoints require membership, and commercial use needs separate licensing.

AlphaResearch

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AlphaResearch is an AI-powered stock research platform for searching filings, transcripts, press releases, reports, notes, fundamentals, estimates, news, insider transactions, institutional ownership, and fund holdings. It is useful for document-heavy research and collaboration, but global coverage and spreadsheet add-ins are Enterprise features and the premium trial requires a credit card.

ApeWisdom

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ApeWisdom is a free social-sentiment and ticker-attention tracker for traders and researchers watching Reddit, WallStreetBets-style communities, crypto subreddits, and 4chan /biz. It is strongest for spotting retail attention and meme-stock chatter early, with public leaderboards and API endpoints, but ticker mentions are noisy and should not be treated as investment quality or price direction.

Autochartist

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Autochartist is an automated market-scanning and trader-engagement platform for active traders, brokers, and trading platforms that want chart-pattern detection, technical trade setups, economic-event analysis, news sentiment, alerts, position sizing, and API or MetaTrader integrations. It is strongest as a signal and workflow layer around technical trading, but pricing, modules, and access often depend on a broker or enterprise relationship rather than a simple public checkout.

Bank of England

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The Bank of England website is the official free source for UK monetary policy decisions, Bank Rate context, MPC calendars and minutes, Monetary Policy Reports, statistics, exchange-rate and interest-rate series, and UK yield-curve downloads. It is strongest as a primary-source macro and rates reference for analysts, students, investors, and developers, but it is not an investing app and some datasets, including yield curves, are delivered as files rather than a full API.

Bank of Japan (BOJ)

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The Bank of Japan website is the official free source for Japanese monetary policy releases, meeting schedules, BOJ statistics, release calendars, time-series downloads, charts, and API access. It is strongest for analysts, students, developers, and investors who need primary-source Japan rates, FX, money stock, TANKAN, balance-of-payments, and central-bank data, but it is a macro data source rather than an investing app or security-level research terminal.

BIS Data Portal

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BIS Data Portal is the official free statistics portal from the Bank for International Settlements for global macro-financial time series, exports, bulk downloads, release calendars, charts, tables, and SDMX API access. It is strongest for analysts, students, quants, and builders who need cross-country banking, credit, debt, derivatives, liquidity, property-price, exchange-rate, and central-bank statistics, but it is an official macro data source rather than an equity terminal or trading platform.

BizToc

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BizToc is a free business and finance news aggregator for investors who want a fast headline grid, real-time Wire feed, market snapshot, imagery view, search, RSS, mobile access, and a lightweight API route through RapidAPI. It is strongest for quick market-awareness and headline discovery before reading original sources, but it is an aggregator rather than original reporting, valuation research, portfolio analytics, or a full financial-data platform.

Börsdata

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Börsdata is a Nordic-first equity analytics, screening, and data platform for investors who want long-history fundamentals, thousands of ratios, strategy screens, ownership data, insider and short-selling context, technical charts, reports, watchlists, calendars, and API or spreadsheet access. It is strongest for Nordic stock research, while global coverage, holdings data, Excel/Sheets workflows, and REST API access depend on paid tiers and professional users are routed to Enterprise.

Business Quant

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Business Quant is a U.S. equities research, screening, KPI, and financial-data platform for investors who want fundamentals, operating metrics, segment data, analyst estimates, ratings, warnings, 13F ownership, insider trades, exports, and API access. It is strongest for U.S. stock research where business-driver KPIs matter, but free KPI depth is shallow and serious API, export, history, and commercial-use workflows require paid plans.

Calcbench

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Calcbench is a professional SEC filing, XBRL, financial statement, disclosure, and Excel research platform for analysts who need traceable as-filed numbers, standardized accounting metrics, footnotes, redlines, proxy data, compensation data, M&A details, and API access. It is strongest for accounting-heavy U.S. equity research and data workflows, but meaningful access is priced for professional users and API access is sold separately from standard subscriptions.

CFPB Consumer Complaint Database

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CFPB Consumer Complaint Database is the official free U.S. regulatory dataset for consumer financial complaints about banks, lenders, credit bureaus, fintechs, debt collectors, mortgage servicers, cards, payments, and other consumer-finance products. It is strongest for analysts who need complaint trends by company, product, issue, geography, response status, narrative availability, downloads, and API access, but complaints are submissions rather than verified findings.

Changeflow (Trackly)

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Changeflow, formerly reached through Trackly, is an AI website-change intelligence platform for monitoring filings, regulator pages, IR pages, competitor pages, PDFs, feeds, and other online sources. It is useful for investment and compliance teams that want relevant briefings rather than raw page diffs, but it is not market data, trade execution, or a substitute for human review.

CME FedWatch

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CME FedWatch is the widely used CME Group tool for tracking market-implied probabilities of Federal Reserve target-rate outcomes for upcoming FOMC meetings, derived from 30-Day Fed Funds futures. It is strongest for macro investors, rates teams, journalists, and dashboards monitoring Fed-rate expectations, with a free web tool plus paid EOD and intraday API options, but probabilities are market-implied estimates, not Fed guidance or investment advice.

Danelfin

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Danelfin is an AI stock and ETF scoring platform built around a 1-10 AI Score that estimates the probability of outperforming the market over the next three months. It serves as a ranking, screening, portfolio-alert, and API layer for idea generation, not as a standalone investment process.

Diffchecker

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Diffchecker is a document-comparison tool for text, Word files, PDFs, Excel files, images, folders, APIs, and desktop workflows. Use it in investing work when you need fast redlines for filings, research drafts, models, contracts, or disclosure changes, not when you need financial data itself.

Dune

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Dune is a crypto and onchain analytics platform for SQL dashboards, decoded blockchain data, APIs, alerts, uploads, teams, and AI-agent workflows. It is useful when you want to build or automate custom onchain analysis across many blockchains rather than consume a fixed market-data screen.

ECB Data Portal

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ECB Data Portal is the official free European Central Bank source for ECB statistics, euro area macro data, interest rates, exchange rates, yield curves, downloads, charts, and SDMX API access. It is useful when you need primary-source European macro data rather than a commercial terminal summary.

EDINET

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EDINET is Japan's official electronic corporate-disclosure system. It supports issuer, security, fund, stock-code, document-type, keyword, and date searches, with source filings, XBRL resources, taxonomy files, and an API for programmatic filing retrieval.

EIA Open Data

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EIA Open Data is the U.S. government source for statistical and operational energy data. Analysts and developers can browse energy series or retrieve them through a free API, bulk files, and spreadsheet tools for macro, commodity, utility, and energy-market research.

Estimize

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Estimize is a crowdsourced earnings and macro-estimates platform for investors and data teams that want alternative expectations data before company reports and economic releases. It supports EPS, revenue, and macro forecast context, not for broad portfolio management or trading execution.

ETF Action

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ETF Action is an ETF analytics platform for advisors, asset managers, and ETF-focused investors who need classification, look-through holdings, overlap, flows, model portfolios, 13F screening, exports, and enterprise data workflows. It is useful when ETF research and model construction need more depth than a free quote page.

European Central Bank (ECB) — Statistics & Data

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European Central Bank Statistics & Data is the official ECB source for euro-area statistics, policy rates, FX reference rates, yield curves, inflation, macro indicators, downloads, and SDMX API access. It is useful when you need primary-source European macro and rates data rather than investment-app commentary.

FactorsToday

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FactorsToday is a quantitative factor-investing platform with dashboards, screeners, portfolio factor analysis, attribution, hedge construction, factor portfolio building, downloads, and an open REST API. It is useful when you need factor exposure workflows without building every model and endpoint yourself.

FDIC BankFind Suite (BankFind)

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FDIC BankFind Suite is the official free FDIC source for looking up FDIC-insured banks, branches, histories, structure changes, failures, financials, Summary of Deposits data, APIs, and bulk downloads. It is useful when bank research needs primary-source U.S. government data rather than a commercial bank screener.

Federal Reserve Bank of New York - Data & Statistics

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Federal Reserve Bank of New York Data & Statistics is an official source for U.S. reference rates, markets operations data, SOMA holdings, primary dealer statistics, survey data, and research indicators. It is useful when investors, economists, and data teams need authoritative SOFR, EFFR, OBFR, funding-market, Treasury, agency MBS, and macro indicator data with exportable formats and public API access. It provides source data rather than an analytics product, stock screener, broker, portfolio tracker, alerting system, or full market-data terminal.

Federal Reserve Board (FRB.gov)

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Federal Reserve Board (FRB.gov) is the official U.S. central-bank source for policy materials, FOMC calendars, statistical releases, interest rates, balance sheet data, bank data, FX rates, industrial production, and Data Download Program files. It serves as a primary macro source, not a commercial investing terminal.

Financial Modeling Prep (FMP)

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Financial Modeling Prep (FMP) is a market-data API and spreadsheet-data provider for developers, analysts, quants, and product builders who need equities, ETFs, funds, FX, crypto, commodities, macro, ESG, ownership, news, calendars, transcripts, and fundamentals from one vendor. It is strongest when you want REST and WebSocket access plus Excel and Google Sheets add-ins at a lower entry price than enterprise terminals. The main buying questions are plan limits, geography, history depth, and dataset access: the free Basic tier is a limited EOD sandbox, while real-time, global, transcript, 13F, holdings, intraday, and bulk workflows require paid tiers.

FinancialData.Net

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FinancialData.Net is an API-first financial data platform for developers, analysts, spreadsheet users, and AI-agent builders who want broad market data, fundamentals, ownership, options, funds, ESG, calendars, news, Excel access, and MCP connectivity from one provider. It is strongest when breadth matters: stocks, ETFs, mutual funds, options, futures, crypto, forex, commodities, OTC securities, indices, filings-related datasets, and institutional/insider activity can sit behind one REST API. Serious use is paid, and compliance/security claims should be verified directly because no public audit reports were identified.

FinancialJuice

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FinancialJuice is a live market news and squawk service for traders who need fast audio headlines, real-time text updates, macro calendar context, and market-moving event alerts across equities, rates, FX, commodities, crypto, and futures. Developers can also consume news headlines and economic-calendar events as JSON through the documented WebSocket Stream API. It is strongest for time-to-awareness around economic releases, central-bank news, geopolitical headlines, and session prep rather than deep valuation work. Free access exists, but real-time web, mobile, and API workflows depend on the relevant paid plan.

FinancialReports.eu

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FinancialReports is a public-company filings database, filings API, and hosted MCP server for analysts, AI-agent builders, and data teams that need fast document ingestion, Markdown extraction, watchlist alerts, webhooks, and filing Q&A across global markets. It is strongest when the workflow starts with filings rather than price charts: company documents, insider trades, IPO references, filing feeds, and programmatic document access are the center of the product. The web index is free to browse, while serious API, MCP, webhook, redistribution, and production workflows are contact-sales.

Finatic

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Finatic is a broker-connectivity API for fintech builders who need user brokerage linking, normalized brokerage account data, webhooks, and consented trade execution across many brokers. It is useful infrastructure for portfolio apps, trading journals, automation products, copy-trading workflows, and AI/data systems, but it should be evaluated as an early-stage provider with meaningful security, compliance, and broker-specific permission due diligence.

Find and update company information (Companies House)

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Companies House Find and update company information is the official free UK company register for searching companies, filings, officers, ownership-control records, and document images. It supports UK due diligence, private-company checks, filing alerts, and developer workflows that need primary-source registry data rather than analyst commentary.

FINRA Fixed Income Data

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FINRA Fixed Income Data is an official source for U.S. bond security details, disseminated TRACE transactions, trade-activity history, and aggregate market reports. It is useful for researching executed prices and volumes, but TRACE is not a quote system, exchange, or execution venue.