OSLs forthcoming spot orderbook upgrade is targeted for July 2026 - this page details the API changes.
Background
To further enhance platform stability and improve the trading experience, OSL is excited to announce the upgrade of our Pro Trade system.
We will be transitioning our entire spot trading infrastructure to a next-generation core trading architecture.
For more details, please see the announcement: https://www.osl.com/hk-en/announcement/notice-of-upcoming-osl-hk-pro-trade-system-upgrade
FIX Gateway
As part of OSL's upcoming spot exchange migration, OSL is upgrading to a new, high-performance FIX 4.4 Gateway.
While the new FIX Gateway is verified as fully compatible with legacy message logic, there are three key behavioral differences that your technology teams must be aware of and be able to handle prior to the migration date.
https://osl.com/reference/fix-gateway-upgrade
REST API
Details to follow