According to the announcement from Binance, a FIX TLS connectivity update for the Spot API is scheduled for 2026-06-08 at 03:00 (UTC). The update is expected to last approximately one hour and aims to enhance the performance of the Spot API. During this period, existing FIX connections may experience intermittent drops.
To ensure seamless reconnections and the establishment of new connections post-update, Binance advises users to take specific actions. Users should ensure that their client sends Server Name Indication (SNI) during the TLS handshake and validate the certificate against the requested hostname. Failure to configure SNI may result in error messages related to incorrect certificates during or after the update window, potentially causing TLS handshake or hostname verification failures. This issue is particularly noted with some Node.js clients if SNI is not explicitly configured.
For further technical details, users are encouraged to consult the FIX API documentation and the Binance API Changelog. This update is part of Binance's ongoing efforts to improve its services, although the availability of products and services may vary by region. The announcement underscores the importance of preparing for the update to avoid disruptions in service.
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