[Standard] Base - Sepolia (Testnet) - Upgrade to v1.2.0

Scheduled for Aug 3, 14:00 UTC - Aug 5, 14:00 UTC

Scheduled

We are upgrading our Base Sepolia infrastructure to v1.2.0 on 08/03/2026, with the maintenance window expected to run through 08/04/2026. This upgrade includes a required database migration, which is a larger undertaking than a typical version bump, so we've scheduled additional time to complete it safely.

During this window, users may experience brief interruptions to RPC availability on Base Sepolia as nodes are migrated.

RPC Changes:
No breaking changes to existing RPC methods are expected. This release improves underlying node stability and sync reliability, with no anticipated impact to current API behavior.

Please see the detailed change log at:
https://github.com/base/node/releases/tag/v1.2.0

Posted Jul 29, 2026 - 14:30 UTC

This scheduled maintenance affects: Base (Sepolia - JSON-RPC API, Sepolia - WebSocket API, Sepolia —Webhooks, Sepolia — Streams).