Optimism had 4 outages in the last 2 years — averaging 0.2 incidents per month.
There were 4 Optimism outages since August 19, 2025. Each is summarised below — incident details, duration, and resolution information.
Type: Incident Duration: 1 hour and 2 minutes Affected Components: Transaction Sequencing Mar 4, 23:54:08 GMT+0 - Investigating - Due to an investigation of network bottlenecks the Flashblocks streaming websocket endpoints are temporarily unavailable. Mar 5, 00:55:49 GMT+0 - Resolved - This incident has been resolved.
Type: Incident Duration: 10 minutes Affected Components: Batch Submission, Public API, Withdrawals, , Deposits, Transaction Sequencing, Node Sync, Mainnet → Mar 4, 23:04:00 GMT+0 - Investigating - OP Mainnet has been observed to have various issues within its internal components causing delayed block building and sporadic chain stalls. We're investigating the incident. Mar 4, 23:10:00 GMT+0 - Monitoring - We implemented a fix and are currently monitoring the result. Mar 4, 23:14:00 GMT+0 - Resolved - This incident has been resolved, signified by the restored stable chain progression. Mar 4, 23:07:00 GMT+0 - Identified - The incident's root cause has been identified to be the problems with the networking infrastructure backing the communication between various critical block building components. We are continuing to work on a fix for this incident.
Type: Incident Duration: 4 hours and 2 minutes Affected Components: Transaction Sequencing Nov 19, 19:13:03 GMT+0 - Identified - The problem has been diagnosed and a fix is being worked on by the flashbots team. Nov 19, 21:30:24 GMT+0 - Monitoring - A fix has been applied and we are monitoring for stability. Nov 19, 21:36:43 GMT+0 - Resolved - This incident has been resolved, flashblocks are now operational again. Nov 19, 17:34:30 GMT+0 - Investigating - Following the activation of the Jovian hardfork, we detected some problems with op-rbuilder and are investigating the root cause. Nov 19, 17:45:20 GMT+0 - Investigating - To clarify, regular (non-flashblocks) usage is unaffected. Unsafe and safe head progression and the rest of the system are fully operational.
Type: Incident Duration: 22 minutes Affected Components: Public API Aug 19, 18:05:31 GMT+0 - Resolved - This incident has been resolved. Aug 19, 17:43:56 GMT+0 - Monitoring - We experienced an outage of our mainnet public endpoint during routine cluster upgrade. We implemented a fix and are currently monitoring the result.