For AI agents: a documentation index is available at the root level at /llms.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
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IntroductionAccount ManagementTradingAPI ReferenceWeb API v1.0 DocumentationFlex Web ServiceChangelog
IntroductionAccount ManagementTradingAPI ReferenceWeb API v1.0 DocumentationFlex Web ServiceChangelog
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Changelog

November 18, 2025
November 18, 2025

IBKR WebAPI | Trading Web API

The /hmds/history endpoint has been removed from the documentation as it is now considered deprecated. Users interested in retrieving historical data from the WebAPI should instead use the /iserver/marketdata/history endpoint.

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