Best APIs & Data Feeds Tools for Investing

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.

PortfoliosLab

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PortfoliosLab is a web-based portfolio analytics platform for backtesting, optimization, risk metrics, correlations, screeners, and AI-assisted portfolio workflows. It is useful for comparing stocks, ETFs, funds, crypto, and model portfolios, with more history, imports, exports, and MCP access gated by paid tiers.

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.

OpenBB

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OpenBB combines an open-source financial data layer with a hosted Workspace for dashboards, AI research, custom agents, and team workflows. It is best for analysts, quants, developers, and firms that want to connect their own market data, internal datasets, provider API keys, widgets, MCP tools, and AI workflows instead of buying a closed terminal. Community access is useful for individuals, while Pro adds collaboration, exports, Excel, RBAC, SSO, MFA, and private deployment options. OpenBB does not provide production market data itself; it orchestrates connectors, your data, and your vendor access.

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.

FRED (Federal Reserve Economic Data)

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FRED (Federal Reserve Economic Data) is the free macroeconomic time-series database from the Federal Reserve Bank of St. Louis, used by students, investors, analysts, quants, and product builders who need trusted economic data, charts, release calendars, Excel access, mobile apps, and a REST API. It is strongest for official macro context around inflation, rates, GDP, employment, exchange rates, credit, and market indicators rather than equity fundamentals or brokerage workflows. API users need a free API key, and usage remains subject to FRED terms and source-specific data restrictions.

Interactive Brokers (IBKR)

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Interactive Brokers (IBKR) is a global multi-asset brokerage platform for active investors, professionals, quants, and institutions who need broad market access, advanced order types, SmartRouting, APIs, paper trading, and portfolio analytics. It is strongest for serious execution and automation workflows, but commissions, market-data subscriptions, product availability, and API limits vary by market, account type, and jurisdiction.

ORTEX

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ORTEX is a market-data and analytics platform best known for short interest, securities lending, options flow, and trading-signal context. It fits active investors, analysts, and data teams that need more than a basic quote page, with deeper web-app and API access moving behind paid tiers.

Portfolio123

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Portfolio123 is a rules-based quant research and portfolio-management platform for investors who want stock and ETF screeners, ranking systems, factor research, realistic backtests, strategy simulations, portfolio tracking, broker connectivity, and API/DataMiner access. It is strongest for systematic investors who want point-in-time research workflows without building everything from code.

Roic AI

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Roic AI is a financial data, stock research, and API platform for investors and developers who want company financials, transcripts, news, screeners, exports, spreadsheet endpoints, AI research assistance, and MCP or ChatGPT workflows. It is strongest for fundamentals and agent-ready data access, with worldwide coverage on every plan, but plan differences matter for rate limits, history depth, transcript depth, and commercial API use.

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.

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.

Fintel

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Fintel is a market-signal research platform for investors who want short interest, off-exchange volume, institutional ownership, insider trades, ETF exposure, options sentiment, filings, screeners, dashboards, alerts, APIs, and AI-assisted research in one place. It is strongest for ticker-level signal pages and ownership/short-interest workflows that help explain positioning, crowding, and unusual activity before deeper fundamental work. Many premium datasets, AI workflows, exports, options flow, and portfolio tools are tier-gated, and the signals should be treated as research inputs rather than investment recommendations.

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.

Ghostfolio

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Ghostfolio is an open-source, privacy-focused portfolio and wealth tracker for investors who want self-hosted control, multi-account portfolio tracking, net-worth dashboards, imports, charts, risk views, and REST API access. It is strongest for technical users who prefer transparency and self-hosting over a closed portfolio app, with Ghostfolio Premium available for managed cloud hosting and professional data-provider access. The tradeoff is operational: free use requires running and maintaining your own instance, while cloud pricing and data-provider details should be checked before choosing Premium.

MesoSim

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MesoSim is an options strategy backtesting platform for traders who need low-code strategy definitions, multi-leg simulations, risk graphs, Greeks, volatility surfaces, margin models, and paper/live workflow paths. It is narrow by design: options research first, not broad stock research or portfolio accounting.

Office of Financial Research (U.S. Treasury)

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Office of Financial Research is a free U.S. Treasury source for official financial-stability monitors, stress indicators, short-term funding data, money-market fund transparency, bank systemic-risk views, and hedge-fund monitor datasets. It is useful for macro, risk, policy, and market-structure research where documented methodology and public JSON or CSV access matter more than a polished investing app. OFR data is generally monitor-specific and often end-of-day or lagged. It is not a real-time market-data feed, stock research terminal, broker, portfolio tracker, or broad trading dataset.

Quiver Quantitative

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Quiver Quantitative is an alternative-data platform for investors who want dashboards, screeners, alerts, backtests, and API access around political trading, insider activity, institutional holdings, lobbying, government contracts, patents, app data, ETF exposure, dark-pool activity, and related datasets. It is strongest when conventional fundamentals are not enough and users want differentiated public-disclosure signals. Web Premium and Quiver API are separate products with different prices, trials, dataset tiers, and commercial-use rules. Alternative data can be noisy and lagged, so it needs validation before being treated as a signal.

WhaleWisdom

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WhaleWisdom is a 13F, institutional ownership, insider, and hedge-fund holdings platform for investors who track filer activity, fund portfolios, watchlists, backtests, exports, and API workflows. It is useful for holdings research, but 13F data is delayed and the deeper history/API workflow is paid.

Wisesheets

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Wisesheets is a spreadsheet-first stock-analysis add-on for Excel and Google Sheets, built around formulas for company financials, key metrics, prices, dividends, analyst data, ETF/fund data, options chains, and broker-connected portfolio data. It is best for investors who want to build research models inside spreadsheets, with commercial use, faster data, and advanced screener workflows gated by plan.

ETF Insider

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ETF Insider is a web-based ETF, mutual fund, and stock portfolio visualization tool for investors who want to see holdings overlap, concentration, correlations, factor exposure, and efficient-frontier style portfolio tradeoffs. It is strongest for diagnosing hidden ETF overlap in U.S.-listed portfolios, with full holdings depth, Excel export, API access, and white-label options gated by Pro or Enterprise plans.

Charles Schwab

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Charles Schwab is a major U.S. brokerage with commission-free online stock and ETF trading, broad account types, research tools, screeners, tax workflows, and the thinkorswim platform suite for active traders. It is strongest for investors who want one regulated brokerage relationship for long-term investing, options, futures, forex, paper trading, alerts, market data, and developer-authorized Trader API workflows. Many core tools are free with an approved account. Schwab is a broker, not an open market-data API or generic portfolio app.

Trading Economics

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Trading Economics is a macro and markets data platform for browsing economic indicators, calendars, forecasts, market data, company financials, news, ratings, and corporate events, with paid REST API, WebSocket, spreadsheet, BI, and AI-assistant integrations. It is strongest for developers, analysts, and teams building dashboards, alerts, research apps, and macro data pipelines from one source. Guest credentials provide limited sample access, while Standard, Professional, and Enterprise plans govern real API use, streaming, rate limits, row limits, and commercial rights. It is data infrastructure, not a broker or investment-advice service.

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.

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.

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.

Global Factor Data (JKP Factors)

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Global Factor Data, often called JKP Factors, is a free academic research dataset and web interface for global equity factor returns, stock characteristics, and reproducible factor-construction code based on Jensen, Kelly, and Pedersen. It is best for quants, researchers, students, and factor-investing teams that need transparent evidence on global factor performance rather than marketing claims. The data is not a live trading feed, and the license is non-commercial unless separate permission is granted.

Insider Screener

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Insider Screener is a global insider-trading research platform for investors who want to screen, track, export, and alert on director and insider transactions across multiple markets. It is more structured than a simple Form 4 list because it standardizes activity across jurisdictions, supports saved screens and tracked stocks on paid plans, and offers a separate REST API for insider transaction data. It serves as an insider-activity signal layer, not as a complete investment thesis, broker, portfolio accounting system, or unrestricted bulk-data feed.

Kubera

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Kubera is a paid net-worth and portfolio tracker for high-net-worth households, founders, expats, advisors, and family-office style users who need one balance-sheet view across bank accounts, brokerages, crypto, real estate, private-company equity, alternatives, documents, beneficiaries, and multiple currencies. It supports global account aggregation, scenario modeling, document storage, estate handoff workflows, white-label advisor portals, and a first-party API. It is tracking and reporting software, not a broker, tax engine, trading/rebalancing execution system, or free personal-finance app.

Listen Notes

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Listen Notes is a podcast search engine, podcast API, alerts product, and dataset provider that can be useful for investors, analysts, and builders treating podcasts as alternative research inputs. It can be used to search podcast metadata, monitor keyword mentions, build podcast discovery workflows, or buy/export podcast datasets for analysis. Podcast mentions are indirect evidence, so Listen Notes should complement financial statements, filings, market data, and verified sources rather than replace them.

SentiSense

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SentiSense is a beta AI market-intelligence and data API platform for investors and developers who want stock data, sentiment, news clustering, social signals, institutional flows, insider trades, congressional trading disclosures, and AI-generated insights in one workflow. It serves as a signal layer for research, not as a broker or adviser.

Social Blade

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Social Blade is a social-channel analytics site and API for tracking public creator statistics across YouTube, TikTok, Twitch, Instagram, Facebook, and X/Twitter. It has large branded and YouTube analytics demand, making it useful as alternative data for creator-economy, media, advertising, influencer, and platform research. Free profiles are useful for quick checks, while Premium and Business API tiers expand history, favorites, top lists, report cards, exports, and API credits. It is not a source of private platform data, company fundamentals, portfolio analytics, broker execution, or investment recommendations.

StockAlert Pro

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StockAlert Pro is an alert-first stock and ETF monitoring platform with configurable alerts, watchlists, AI equity reports, API keys, webhooks, SDKs, and integrations. It is useful when investors or builders need notifications and automation around price, technical, volume, fundamental, dividend, and time conditions, but it is not a broker, full research terminal, or portfolio accounting system.

Visualping

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Visualping is a website-change monitoring and alerting platform that investors, compliance teams, and analysts can use to watch regulator pages, investor-relations pages, pricing pages, competitor pages, and other web sources. It is best treated as a web-native monitoring layer, not a market-data feed, normalized financial database, broker, or guarantee that every page change is investment-relevant.

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.

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.

Financial Datasets

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Financial Datasets is a developer-focused financial data API and official MCP server for teams building AI agents, stock screeners, portfolio tools, research apps, and quantitative workflows. It is strongest when you need simple programmatic access to U.S. equity fundamentals, prices, SEC filings, insider trades, institutional ownership, news, crypto prices, and screener endpoints without assembling many separate data vendors. The tradeoff is scope and licensing: coverage is centered on U.S. public companies, there is no permanent free tier, and redistribution is gated to Scale.

Masttro

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Masttro is an enterprise wealth operating system for UHNW families, single-family offices, multi-family offices, RIAs, private banks, and professional-services firms that need consolidated reporting across custodians, entities, currencies, alternatives, documents, compliance, client portals, and AI-assisted workflows. It is built for complex wealth operations, not self-directed retail portfolio tracking. Pricing is quote-based, fixed annual licensing rather than AUM-based, and evaluation normally requires a demo and implementation scoping.

QuantRocket

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QuantRocket is a Docker- and Jupyter-based quant research, backtesting, data, and live-trading platform for technical Python users. It is strongest when you want local infrastructure, Interactive Brokers integration, point-in-time research, and API/CLI workflows rather than a point-and-click retail app.

Similarweb

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Similarweb is a digital intelligence and website traffic analytics platform for researching web traffic, app usage, keywords, referrals, competitors, companies, technologies, and online market share. For investors, it provides alternative data for digital businesses such as marketplaces, ecommerce, SaaS, media, travel, and consumer internet, not reported financials. Meaningful API, history, exports, integrations, and enterprise workflows are paid or custom. It is not a broker, portfolio tracker, valuation model, fundamentals terminal, or direct source of company revenue.