[Urgent] Monad - Mainnet - Upgrade to v0.15.2

Scheduled for Aug 20, 01:00 - 09:00 UTC

Scheduled

We are upgrading our Monad Mainnet infrastructure to v0.15.2, which includes preparation for the MIP-8 hardfork and a dual-database migration.

During the maintenance window, brief interruptions to RPC availability may occur.

RPC Changes:
- eth_call — the execution revert error code has changed from -32603 to 3. If your integration checks for -32603 on reverts, update it to expect 3.
- eth_getStorageAt — fixed an issue where this method could incorrectly return 0 on certain nodes.

RELEASE: https://github.com/category-labs/monad/releases/tag/v0.15.2

Posted Aug 18, 2026 - 15:15 UTC

This scheduled maintenance affects: Monad (Mainnet - JSON-RPC API, Mainnet - Streams, Mainnet - Websockets API, Mainnet - Webhooks).