Free academic US equity 1-minute bar data and global economic time series (ElkassabgiData).

The server provides access to free 1-minute OHLCV bars for U.S. stocks and ETFs, updated daily, plus global economic time series via ElkassabgiData.

🛠️ Key Features

1-minute OHLCV data for 1,391 U.S. stocks and ETFs, December 2002 to present
Daily updates to ensure current coverage
Multiple data sources (PiTrading, IEX) for historical depth
Free academic time-series access

🚀 Use Cases

Research backtesting with high-frequency 1-minute bars
Academic studies on US equity markets and economic indicators
Trend analysis using hourly/daily follow-up data
Time-series analyses spanning 2002–present

⚡ Developer Benefits

Clear data excerpts and source references in the readme
API and website links for data downloads and integration
DOI reference for citation in academic work

⚠️ Limitations

IEX data covers only a portion of the full tape (~2–3% of volume) as of Mar 2022–present
Coverage primarily US equities; global economic time series may vary by source
Data availability is subject to source updates and licensing terms

HF Data Library

Free 1-minute OHLCV bars for 1,391 U.S. stocks and ETFs, December 2002 → present, updated daily.

Website / downloads: https://hfdatalibrary.com · API: https://api.hfdatalibrary.com · DOI: 10.5281/zenodo.19501605

Data sources

Period	Source	Coverage
Dec 2002 – Mar 2022	PiTrading (consolidated tape, CTA/UTP)	All U.S. equity exchanges
Mar 2022 – present	IEX Exchange market data (HIST pcap files)	IEX exchange only, ~2–3% of consolidated volume — a reference point, not the full tape

Post–March 2022 bars reflect IEX-only trading activity. Some tickers have no IEX trades on a given day. See Known Issues before using the post-2022 segment for research.

Upstream source attribution (required)

Bars dated 2022-03-07 onward are derived from IEX market data. If you redistribute or provide access to this data, include:

Data provided for free by IEX. By accessing or using IEX Historical Data, you agree to the IEX Historical Data Terms of Use.

IEX retains all rights in the underlying securities information.

License

The compilation, documentation, and pre-2022 portion are licensed CC BY 4.0 — cite Elkassabgi, A. (2026). HF Data Library: Free 1-Minute Intraday U.S. Equity Data. Zenodo. https://doi.org/10.5281/zenodo.19501605. Post–March 2022 bars additionally remain subject to the IEX Historical Data Terms of Use above.

Repository contents

This repo holds the website (index.html, pages/), the Cloudflare Worker API (api/), and the daily data pipeline (pipeline/ — IEX HIST pcap download, Go TOPS parser, bar building, 9-step cleaning, R2 upload). The data itself is distributed from https://hfdatalibrary.com, not from this repository.

query	string	required	Free-text search, e.g. 'germany inflation' or 'GDP per capita'
source	string	optional	Restrict to one source id, e.g. 'worldbank', 'ecb', 'imf_weo'
limit	integer	optional

series_id	string	required	Exact catalog id from search_econ_series, e.g. 'worldbank:NY.GDP.MKTP.CD:DEU'
date_from	string	optional
date_to	string	optional
max_rows	integer	optional

ticker	string	required	e.g. AAPL, SPY
dataset	string	optional
version	string	optional
format	string	optional	csv only applies to bars

ElkassabgiData

🛠️ Key Features

🚀 Use Cases

⚡ Developer Benefits

⚠️ Limitations

search_econ_series

get_econ_series

get_econ_series_metadata

list_econ_sources

get_data_freshness

get_hf_download_link

get_hf_variables_dictionary

get_family_status

get_auth_status

HF Data Library

Data sources

Upstream source attribution (required)

License

Repository contents

Install

Remote endpoint