Free, research-grade data — one account, every library.

A family of free, documented, citable data libraries built for researchers, students, and practitioners. Register once; the same key unlocks every library, now and forever.

—Economic Observations

—Economic Series

—1-Minute Equity Bars

1,391U.S. Stocks & ETFs

Create your free account HF Data Library Econ Data Library IP Data Library

By the numbers

Everything the libraries hold today — the big counts are pulled live from each library, never hand-typed.

Equities · live

HF Data Library

1,391: U.S. stocks & ETFs
—: 1-minute OHLCV bars (raw)
5,847: trading days covered
25: academic variables per ticker-day
2002 → today: daily-updated history (23 years)

Macro & finance · live

Econ Data Library

—: economic & financial observations
—: individual series
250+: official sources & agencies
6: interface languages
Year 1 CE → today: span of historical data

One free ElkassabgiData account unlocks every figure above — and every library still to come.

The libraries

Three today, more on the way — every one free, documented, and citable.

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Equities · live

HF Data Library

1-minute OHLCV bars

Research-grade 1-minute OHLCV bars for 1,391 U.S. stocks and ETFs back to 2002 — raw and cleaned versions, 25 pre-computed academic variables per ticker/day, updated every trading day. A free, citable TAQ/CRSP alternative.

hfdatalibrary.com →

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Macro & finance · live

Econ Data Library

economic & financial series

Global economic & financial data: billions of individual series from the worlds statistical sources — national accounts, prices, trade, labor, energy, markets — in one namespace, with per-series licensing and producer-first citations, auto-updated.

econdatalibrary.com →

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Patents & innovation · live

IP Data Library

9.4M+ patents · innovation measures

Research-grade innovation measures computed from the complete US patent record — citations, originality & generality, firm patent panels — free, citable, reproducible, with honest methodology. US patent data is public domain.

ipdatalibrary.com →

Works inside Claude & other AI assistants

Every library is also available through the ElkassabgiData MCP server — connect https://elkassabgidata-mcp.elkassabgi.workers.dev/mcp in Claude or any MCP client and your assistant can search, fetch, and analyze the data with citations attached. Setup guide →

One account. Every library.

Register once — here, on hfdatalibrary.com, econdatalibrary.com, or ipdatalibrary.com — and you're an ElkassabgiData registered user: the same free API key downloads data from every current and future library. No re-registration, ever.

Create your free account