[Standard] [Mainnet | Testnet] OP Stack Upgrade — op-reth v2.1.0

Scheduled for Apr 29, 01:00 - 09:00 UTC

Scheduled

We are upgrading our OP Stack op-reth node to v2.1.0. During the maintenance window, brief interruptions to RPC availability may occur. This release bumps reth to its official v2.0.0 stable release and adds support for the upcoming Karst hardfork.

https://github.com/ethereum-optimism/optimism/releases/tag/op-reth%2Fv2.1.0

Posted Apr 22, 2026 - 14:45 UTC

This scheduled maintenance affects: Optimism (Mainnet — JSON-RPC API, Mainnet — Websockets API, Mainnet — Webhooks, Mainnet — Streams, Sepolia - JSON RPC, Sepolia - Websockets API, Sepolia — Webhooks, Sepolia — Streams), Cyber (Mainnet - JSON-RPC API, Mainnet - Websockets API, Mainnet — Streams, Mainnet — Webhooks, Sepolia — JSON-RPC API, Sepolia — Websockets API, Sepolia — Streams, Sepolia — Webhooks), Mode (Select Access) (Mainnet — JSON-RPC API, Mainnet — Websockets API, Mainnet — Streams, Mainnet — Webhooks), Zora (Select Access) (Mainnet — JSON-RPC API, Mainnet — Websockets API, Mainnet — Streams, Mainnet — Webhooks), B3 (Mainnet — JSON-RPC API, Mainnet — WebSocket API, Mainnet — Streams, Mainnet — Webhooks, Sepolia — JSON-RPC API, Sepolia — WebSocket API, Sepolia — Streams, Sepolia — Webhooks), Ink (Beta) (Mainnet — JSON-RPC API, Mainnet — Websockets API, Mainnet — Streams, Mainnet — Webhooks, Sepolia — JSON-RPC API, Sepolia — Websockets API, Sepolia — Streams, Sepolia — Webhooks), Lisk (Select Access) (Mainnet — JSON-RPC API, Mainnet — Websockets API, Mainnet — Streams, Mainnet — Webhooks), and Unichain (Beta) (Mainnet — JSON-RPC API, Mainnet — Streams, Mainnet – Websockets API, Mainnet — Webhooks, Sepolia — JSON-RPC API, Sepolia – Websockets API, Sepolia — Streams, Sepolia — Webhooks).