BULK Mainnet Scheduled Upgrade - Sunday, September 20, 2026
Maintenance schedule - UTC
12:00–13:00 - Scheduled downtime. Trading will be unavailable; API and WebSocket connections will be interrupted.
13:00–13:30 - Markets reopen in post-only / reduce-only mode. Post-only orders or orders that reduce existing positions will be permitted.
13:30 - Normal trading is scheduled to resume, subject to final checks.
ALO / POST ONLY orders will be cleared during the upgrade. All GTC and conditionals remain untouched. Clearing orders does not close existing positions!
What’s changing:
- L2 market-data improvements: updated initial subscription snapshots and filtering of stale deltas already covered by the snapshot, improving order-book reconstruction on connection and resubscription.
- Order lifecycle fixes: improved place/cancel response tracking and cleanup of executed isolated conditional orders.
- Execution safeguards: improved error handling and execution-budget refresh after collateral transfers.
- Conditional-order integrations: builder-code support and associated signing updates.
- API improvements: clearer maintenance responses, trusted-proxy rate-limit handling, and corrected daily statistics/open-interest reporting.
No breaking change in normal - market & limit orders is expected, but a change in format for orders carrying builder codes will change. And the new format will be published post upgrade.
Happy trading and gBULK!