[Urgent] Polkadot - Mainnet - Upgrade Polkadot REST API to v0.2.1

Scheduled Maintenance Report for Quicknode

Completed

The scheduled maintenance has been completed.

Posted Sep 11, 2026 - 03:00 UTC

In progress

Scheduled maintenance is currently in progress. We will provide updates as necessary.

Posted Sep 11, 2026 - 00:00 UTC

Scheduled

We are upgrading our Polkadot Mainnet REST API infrastructure to v0.2.1. This release fixes critical issues with v4 extrinsic decoding on chains exposing multiple transaction extension versions, ensuring block data is returned completely and accurately.

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

RPC Changes:
- /v1/blocks — v4 extrinsic decoding is now correct on chains with multiple transaction extension versions (e.g., Asset Hub Polkadot); previously, some v4 extrinsics were silently skipped from block responses due to incorrect extension version metadata resolution.
- /accounts/* — Endpoints now have full integration test coverage and corrected XCM location validation.

https://github.com/paritytech/polkadot-rest-api/releases/tag/v0.2.1

Posted Sep 10, 2026 - 21:18 UTC

This scheduled maintenance affected: Polkadot (Mainnet - JSON RPC API).