Scheduled: Isthmus Network Upgrade - Upgrade Optimism and Superchain clients

Scheduled for May 5, 14:00 UTC - May 6, 14:00 UTC

Scheduled

In preparation for the Isthumus Hard Fork (May 9th 2025), op stack node clients will be upgraded to the latest versions for the following chains:

Base, Cyber, Ink, Lisk, Mode, Optimism, Race, Unichain, World, Zora

Optimism Foundation Blog:
https://docs.optimism.io/notices/upgrade-15

Posted Apr 26, 2025 - 21:13 UTC

This scheduled maintenance affects: Optimism (Mainnet — JSON-RPC API, Mainnet — Websockets API, Mainnet — QuickAlerts, Mainnet — Streams), Base (Mainnet — JSON-RPC API, Mainnet — Websockets API, Mainnet — QuickAlerts, Mainnet — Streams), Mode (Select Access) (Mainnet — JSON-RPC API, Mainnet — Websockets API), Zora (Select Access) (Mainnet — JSON-RPC API, Mainnet — Websocket API), RACE (Mainnet — JSON-RPC API, Mainnet — Websocket API), World Chain (Beta) (Mainnet — JSON-RPC API, Mainnet — Websockets API), Lisk (Mainnet — JSON-RPC API, Mainnet — Websockets API), Cyber (Mainnet - JSON-RPC API, Mainnet - Websockets API), and Ink (Beta) (Mainnet — JSON-RPC API, Mainnet — Websockets API).