Enhancements in Trading System APIs in Equity, Equity Derivatives, Currency Derivatives & Commodity Derivatives segments – Mandatory Release

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NOTICE Notice No. 20260515-36 Notice Date 15 May 2026 Category Trading Segment General Department Trading Development Subject Enhancements in Trading System APIs in Equity, Equity Derivatives, Currency Derivatives & Commodity Derivatives segments – Mandatory Release Attachments No Attachment Enhancements in Trading System APIs in Equity, Equity Derivatives, Currency Derivatives & Commodity Derivatives segments – Mandatory Release All trading members are hereby informed that it is proposed to undertake certain enhancements in the Exchange’s trading system. To facilitate this, some changes in the ETI APIs shall be required. For this purpose, new ETI API version, ver.1.6.14 has been made available. Key Changes being introduced in ETI API version 1.6.14 – • New field – Algo ID added to order & quote mass cancellation messages • New Error code related to debarred client • Revised identification for Location ID Testing Availability and Implementation Schedule New ETI API version has been made available on the Exchange website at the given weblink - http://www.bseindia.com/nta.aspx . The above-mentioned changes shall be made available for testing in the simulation test environment by Tuesday, May 26, 2026. All third-party trading application vendors and members having in-house developed trading application are requested to take note of the API changes & ensure necessary system development in their trading application. The above-mentioned enhancements shall be made available for live trading as follows – • Equity segment: with effect from Monday, June 22, 2026 (mock trading on Saturday, June 20, 2026) • Equity Derivatives, Currency Derivatives & Commodity Derivatives segments: with effect from Monday, June 29, 2026 (mock trading on Saturday, June 27, 2026). For any clarifications or technical assistance, please contact the BSE Tech Team at email - bse.tech@bseindia.com or telephone – 022 – 2272 8053. For & on behalf of BSE Ltd, Nawaid Pathan Tejash Somaiya Vice President – Information Technology Vice President – Trading Development May 15, 2026