QuickNode incident

Arbitrum Mainnet - Elevated 503 and API Errors

Minor Resolved View vendor source →

QuickNode experienced a minor incident on May 20, 2026 affecting Mainnet Nitro — JSON-RPC API and Mainnet Nitro — WebSocket API and 1 more component, lasting 3h 15m. The incident has been resolved; the full update timeline is below.

Started
May 20, 2026, 07:43 PM UTC
Resolved
May 20, 2026, 10:58 PM UTC
Duration
3h 15m
Detected by Pingoru
May 20, 2026, 07:43 PM UTC

Affected components

Mainnet Nitro — JSON-RPC APIMainnet Nitro — WebSocket APIMainnet Classic — JSON-RPC APIMainnet Classic — WebSocket APIMainnet — WebhooksMainnet — Streams

Update timeline

  1. investigating May 20, 2026, 07:43 PM UTC

    We are investigating an elevated rate of 503 errors affecting Arbitrum Mainnet. Our team has identified an issue with backend connectivity and is actively working to restore full service. We will provide updates as more information becomes available.

  2. monitoring May 20, 2026, 08:34 PM UTC

    A fix has been implemented and we are monitoring the results.

  3. resolved May 20, 2026, 10:58 PM UTC

    This incident has been resolved.