Optimism Outage History
5 incidents recorded over the last 365 days. Durations are measured from when PulsAPI first saw the problem to when it cleared, which is usually longer than the vendor's own figure.
Every Recorded Optimism Incident
| Date | Incident | Duration | Status |
|---|---|---|---|
| Nov 5, 2026 | Scheduled Maintenance on Sequencers and BatchersScheduled Maintenance | 2h 0m | Scheduled |
| Oct 30, 2026 | OP-SepoliaScheduled Maintenance | 2h 0m | Scheduled |
| Oct 15, 2026 | OP-Sepolia Scheduled MaintenanceScheduled Maintenance | 24h 0m | Scheduled |
| Aug 31, 2026 | OP Mainnet: scheduled 200 ms subblocks enablementScheduled Maintenance | 3h 0m | Scheduled |
| Aug 13, 2026 | Flashblocks Mainnet & Sepolia MaintenanceScheduled Maintenance | 2h 0m | Scheduled |
Hear about the next one while it is open
Everything above is a record written after the fact. We can email you when the next Optimism incident opens instead, at the point where knowing still changes what you do.
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How to Read This Optimism Incident Log
Each row is an incident PulsAPI observed, not a summary written afterwards. The duration is wall-clock time between the first failing check and the first clean one, so it includes the window before Optimism acknowledged anything. Vendor post-mortems typically measure from acknowledgement, which is why their numbers are usually shorter.
Incidents still open have no duration yet and are listed as ongoing rather than being given a running total. The archive covers the last 365 days; anything older has aged out of the window rather than never having happened.
The longest single Optimism outage in this window ran 1d, against a mean recovery of 6h 36m. If you depend on Optimism in a customer-facing path, the longest figure is the one to design around. The mean is what happens on a normal bad day; the maximum is what happens on the worst one.