Alchemy incident

Base Mainnet Webhook Delivery Delays

Notice Resolved View vendor source →

Alchemy experienced a notice incident on May 21, 2026 affecting Base, lasting 9h 24m. The incident has been resolved; the full update timeline is below.

Started
May 21, 2026, 05:15 AM UTC
Resolved
May 21, 2026, 02:40 PM UTC
Duration
9h 24m
Detected by Pingoru
May 21, 2026, 05:15 AM UTC

Affected components

Base

Update timeline

  1. investigating May 21, 2026, 09:24 PM UTC

    Between 05:00 - 07:00 UTC on May 21, 2026, Alchemy's Base Mainnet webhook delivery experienced delays. Customers may have received delayed webhook notifications during this time.

  2. resolved May 21, 2026, 09:25 PM UTC

    Our system finished backfilling all events around May 21 14:40 UTC. Service has since returned to normal.