https://openbrokerapi.com/brokers/ibkr Dated changes, each with the page it was read on. Independent and unofficial. en-GB Mon, 12 Oct 2026 00:00:00 +0000 https://openbrokerapi.com/changes IBKR's Web API pacing page and its Campus Web API documentation both now state a penalty box of 10 minutes for an IP address that breaks a rate limit. This site previously recorded 15 minutes, and that the two pages disagreed. Source: IBKR Web API, pacing limitations, https://www.interactivebrokers.com/docs/web-api/trading/usage-and-availability/pacing-limitations Mon, 12 Oct 2026 00:00:00 +0000 Documentation urn:openbrokerapi:change:ibkr-2026-10-12-81 https://openbrokerapi.com/changes TWS API pacing is stated as market data lines divided by two per second, not a flat 50 per second. The familiar 50 is what the formula returns at the default line count. Read 23 September 2026. Source: IBKR: TWS API pacing limitations, https://www.interactivebrokers.com/docs/tws-api/doc/pacing-limitations/introduction Wed, 23 Sep 2026 00:00:00 +0000 Ecosystem urn:openbrokerapi:change:ibkr-2026-09-23-1 https://openbrokerapi.com/changes Web API OAuth 2.0 is in beta and now covers first and third party access including account management. OAuth 1.0a remains trading only. Read 23 September 2026. Source: IBKR Campus: Web API documentation, https://www.interactivebrokers.com/campus/ibkr-api-page/webapi-doc/ Wed, 23 Sep 2026 00:00:00 +0000 Addition urn:openbrokerapi:change:ibkr-2026-09-23-2 https://openbrokerapi.com/changes Two corrections from today's re-read. The penalty box is recorded as 15 minutes, the figure the Client Portal Web API page served today, with repeated breaches able to bring a permanent block; IBKR's own pages have disagreed on this and the earlier 10 minute reading stays on the record. And TWS pacing is not a flat 50 a second: it is market data lines divided by two, per second, so 200 lines gives 100 a second. Source: IBKR TWS API: pacing limitations, https://www.interactivebrokers.com/docs/tws-api/doc/pacing-limitations/introduction Wed, 23 Sep 2026 00:00:00 +0000 Change urn:openbrokerapi:change:ibkr-2026-09-23-3 https://openbrokerapi.com/changes Agentic trading with Claude was announced on 1 Jun 2026 with a human in the middle: AI instructions land in an AI Instructions tab on the Orders and Trades page for client approval, with ChatGPT, Gemini and Grok in certification. On 28 Jul 2026 IBKR opened AI connectivity to any MCP-compatible tool, still draft only, with the client reviewing each instruction and converting it to an order before submission and clients controlling what the AI can access. Execution authority on this site: draft then human confirms. Source: IBKR media release, 28 Jul 2026, https://www.interactivebrokers.com/en/general/about/mediaRelations/7-28-26.php Sun, 20 Sep 2026 00:00:00 +0000 Change urn:openbrokerapi:change:ibkr-2026-09-20-1 https://openbrokerapi.com/changes IBKR's Web API documentation states it is "merging our web-based API products into a single, comprehensive IBKR Web API", folding in Client Portal Web API, Digital Account Management and the Flex Web Service under OAuth 2.0. OAuth 2.0 is marked beta; OAuth 1.0a is first-party and trading only. TWS API stays separate. Access is self-serve: "Clients with fully open and funded accounts may use our Web API ... without any onboarding or approval process", on a funded IBKR Pro account. Source: IBKR Campus: Web API documentation, https://ibkrcampus.com/campus/ibkr-api-page/webapi-doc/ Sat, 19 Sep 2026 00:00:00 +0000 Change urn:openbrokerapi:change:ibkr-2026-09-19-1 https://openbrokerapi.com/changes TWS 2026 release notes (page updated 14 Sep 2026): 10.47 removed fundamental data methods and callbacks; 10.50 adds conditionsIncludeOvernight to Order. Per version dates are not given. Source: IBKR guides: TWS 2026 production release notes, https://www.ibkrguides.com/releasenotes/prod-2026.htm Mon, 14 Sep 2026 00:00:00 +0000 Breaking urn:openbrokerapi:change:ibkr-2026-09-14-1 https://openbrokerapi.com/changes Pacing for GET /iserver/marketdata/history was capped at 10 requests a second or 50 a minute. The changelog does not give the previous limit, so any client paced by an older figure needs rechecking. Source: IBKR Web API changelog, https://www.interactivebrokers.com/docs/web-api/changelog Wed, 09 Sep 2026 00:00:00 +0000 Breaking urn:openbrokerapi:change:ibkr-2026-09-09-1 https://openbrokerapi.com/changes 9 Sep 2026: /hmds/scanner deprecated and removed from the documentation; secType parameter removed from /iserver/secdef/search. Clients passing secType or calling the HMDS scanner should move to /iserver/scanner/run and search without secType. Source: IBKR Web API changelog, https://www.interactivebrokers.com/docs/web-api/changelog Wed, 09 Sep 2026 00:00:00 +0000 Deprecation urn:openbrokerapi:change:ibkr-2026-09-09-2 https://openbrokerapi.com/changes IBC, the community tool many people use to automate TWS and IB Gateway logins, was retired and archived by its owner on 1 Sep 2026. Only work in progress and significant bug fixes will follow. It is not an IBKR product, but headless setups that depend on it should plan a replacement. Source: GitHub: IbcAlpha/IBC, https://github.com/IbcAlpha/IBC Tue, 01 Sep 2026 00:00:00 +0000 Ecosystem urn:openbrokerapi:change:ibkr-2026-09-01-1 https://openbrokerapi.com/changes TWS API 10.49 released under the GPL, adding Settlement Type to contract details from TWS 10.49.01. Source: IBKR TWS API changelog, https://www.interactivebrokers.com/campus/ibkr-api-page/twsapi-doc/ Mon, 03 Aug 2026 00:00:00 +0000 Ecosystem urn:openbrokerapi:change:ibkr-2026-08-03-1 https://openbrokerapi.com/changes TWS API 10.49 is released under the GNU GPL, and Contract Details now include Settlement Type with TWS or IB Gateway 10.49.01 or later. Source: IBKR Campus: TWS API changelog, https://www.interactivebrokers.com/campus/ibkr-api-page/tws-api-changelog-2/ Mon, 03 Aug 2026 00:00:00 +0000 Addition urn:openbrokerapi:change:ibkr-2026-08-03-2 https://openbrokerapi.com/changes IBKR launches its own hosted MCP server for ChatGPT, Claude, Grok, Perplexity and any MCP client. It reads account data and drafts trade instructions; you submit every order yourself. No extra cost; not available in India or Japan. Source: IBKR press release, 28 Jul 2026, https://www.interactivebrokers.com/en/general/about/mediaRelations/7-28-26.php Tue, 28 Jul 2026 00:00:00 +0000 Ecosystem urn:openbrokerapi:change:ibkr-2026-07-28-1 https://openbrokerapi.com/changes IBKR announced a TWS and API release for 23 Feb 2026; from API 10.44, tick types 71 and 5 return size as Decimal instead of Integer. Source: IBKR Campus: TWS API changelog, https://www.interactivebrokers.com/campus/ibkr-api-page/tws-api-changelog-2/ Mon, 26 Jan 2026 00:00:00 +0000 Breaking urn:openbrokerapi:change:ibkr-2026-01-26-1 https://openbrokerapi.com/changes ib_async 2.1.0 released on PyPI; needs Python 3.10 or later. Source: PyPI: ib_async, https://pypi.org/project/ib_async/ Mon, 08 Dec 2025 00:00:00 +0000 Ecosystem urn:openbrokerapi:change:ibkr-2025-12-08-1 https://openbrokerapi.com/changes ib_async 2.0.1, its first proper release in almost a year: configurable defaults for missing values, new tick types and order deletion fixes. Source: GitHub: ib_async releases, https://github.com/ib-api-reloaded/ib_async/releases Sun, 22 Jun 2025 00:00:00 +0000 Ecosystem urn:openbrokerapi:change:ibkr-2025-06-22-1 https://openbrokerapi.com/changes TWS API 10.34.01 adds reqCurrentTimeInMillis, and Order and Execution objects gain a Submitter field. Source: IBKR Campus: TWS API changelog, https://www.interactivebrokers.com/campus/ibkr-api-page/tws-api-changelog-2/ Fri, 07 Feb 2025 00:00:00 +0000 Addition urn:openbrokerapi:change:ibkr-2025-02-07-1 https://openbrokerapi.com/changes TWS API pacing now caps requests per second at your market data lines divided by 2. Source: IBKR Campus: TWS API changelog, https://www.interactivebrokers.com/campus/ibkr-api-page/tws-api-changelog-2/ Thu, 16 Jan 2025 00:00:00 +0000 Change urn:openbrokerapi:change:ibkr-2025-01-16-1 https://openbrokerapi.com/changes Minimum supported TWS and IB Gateway version rises to 10.30 from 20 Mar 2025. Source: IBKR Campus: TWS API changelog, https://www.interactivebrokers.com/campus/ibkr-api-page/tws-api-changelog-2/ Mon, 13 Jan 2025 00:00:00 +0000 Breaking urn:openbrokerapi:change:ibkr-2025-01-13-1