About HistoricalData.net

What we provide

Stock data

The stock archive contains daily and 1-minute bars for US stocks and ETFs since October 2003, including active and delisted securities. Per-security historical files include raw and split- and dividend-adjusted values. Coverage varies by security.

Options data

The options archive contains end-of-day chains for US stocks, ETFs and indices, with history dating to February 2002. The files include quotes, trading activity, computed Greeks and implied volatility. Coverage and field availability vary by date and contract.

Archives are one-time purchases with an included update period. Separate subscriptions provide continued updates. Downloaded files remain usable under the purchased license after updates end.

How we prepare the data

Stock bars use consolidated trade data from US exchanges and reporting venues, including off-exchange reporting and OTC markets. The options archive combines historical end-of-day records with ongoing daily capture.

We organize market records into documented CSV files, calculate stock price adjustments and option Greeks and implied volatility, and check files before publication. The methodology explains the calculations, session conventions and differences between historical periods.

Independent verification

HistoricalData.net checks published values against records it did not produce. Sample values are reconciled with Cboe official index closes and public quote records, and a fixed panel of stocks, ETFs and option chains is checked against quotes published by Cboe Global Markets after every US trading session.

The method, dated results and every disagreement are published under independent source reconciliation, and reconcile.py repeats the sample comparison on local files.

Cboe Global Markets and the public quote sources are independent reference records. HistoricalData.net is not affiliated with or endorsed by them.

Inspecting the files

The free stock and options samples contain real records from July–December 2022, with all columns in the paid archives' format, so buyers can test the files in their own workflows before purchasing.

Both sample packages include a file manifest and a verification script for the documented checks. The stock field definitions and options field definitions explain each column and its availability. Coverage notes document historical availability and measured comparisons.

Access for AI agents and tools

Coverage and product metadata are available without an account through the coverage API and public MCP server, the OpenAPI specification and llms.txt. A local MCP tool analyzes downloaded files without network access. These endpoints expose metadata and, through the MCP preview_sample tool, a few fixed rows of the free samples; they do not return purchased data or download credentials.