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

By the numbers

Everything both 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

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

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 →
Macro & finance · live

Econ Data Library

economic & financial series
Global economic & financial data: billions of individual series from 250+ sources — national accounts, prices, trade, labor, energy, markets — in one namespace, with per-series licensing and producer-first citations, auto-updated.
econdatalibrary.com →
Coming soon

The next library

The family keeps growing. Every future ElkassabgiData library plugs into the same account on day one — if you're registered, you already have access.

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. Forever.

Register once — here, on hfdatalibrary.com, or on econdatalibrary.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