There were 7 Base outages since February 5, 2026 totaling 1335h 20m of downtime. Each is summarised below — incident details, duration, and resolution information.
Base Sepolia Testnet is experiencing an outage in block production. The team is actively investigating.
Block production has resumed on Sepolia testnet.
We are currently investigating this issue. The Sepolia safe head is current stalled. This seems to affect op-node users running with consensus-layer sync mode.
This is now mitigated. Safe head is progress normally for Sepolia Testnet
Flashblocks is currently down for Sepolia Testnet. The team has identified the issue and is rolling out a fix.
This incident has been resolved.
Base Mainnet is currently not producing flashblocks. Normal block production is unaffected. We're actively working to restore flashblock production.
We've identified an issue in our public RPC nodes that caused certain endpoints to not reflect latest flashblock data. Users may have also experienced increased error rates for read endpoints on https://mainnet.base.org/. We're working on implementing a fix.
A fix has been implemented and we are monitoring the results.
This incident has been resolved.
Users connecting to the Flashblocks websocket (mainnet.flashblocks.base.org) may have trouble connecting and receiving flashblocks. Block production is unaffected. We are currently investigation the issue.
We are monitoring a fix that has been implemented.
This incident has been resolved.
We are currently investigating the issue, blocks are being produced, but with no transaction included.
A fix has been implemented and we are monitoring the results.
This incident has been resolved.
We are actively monitoring network conditions. During periods of high congestion, users may experience intermittent transaction delays or transactions dropped. Submitted transactions can occasionally take up to two minutes to be included in a block or may need to be resubmitted. We are working on longer-term fixes to ameliorate this behavior and will share our plans and updates as we make progress.
We are experiencing heavy transaction volume resulting in inclusion delays. Active fixes are in progress
Update 2/6 01:30 UTC Overview We are actively scaling to meet elevated demand. While immediate infrastructure updates are underway to improve current throughput, we have also initiated several longer-term projects to ensure future stability and network performance. What we did today We’re landing changes to improve the RPC latency for eth_sendRawTransaction calls during load, and improve the efficiency of getting transactions to the block builder for selection: * [Live on Mainnet] - Doubled the disk IO throughput of our txpool * [Live on Mainnet] - Changed our `eth_sendRawTransaction` rate limiting window to smooth out incoming spikes. We will continue changing the rate limiting configuration in the coming days * Built and tested a more stable routing algorithm for sending transactions to the most efficient backend. We expect this to be on Mainnet within a couple of days What’s up next This work is expected to take 4 to 6 weeks. We anticipate this work to achieve stable transaction inclusion and block production * Implementing a transaction propagation redesign that removes the overhead of P2P when getting transactions to the block builder. * Optimizing and scaling configurations for `pending` and `queued` storage of transactions * Unifying the components of our block building, sequencing, and flashblocks streaming We will share updates here as we make progress.
We continue to see improved network stability after updating several elements of our routing infrastructure and as overall market volatility has subsided. We will continue monitoring network health and transaction success rate, while working on further upgrades to routing and transaction propagation layers which we described below. Several larger upgrades are deployed on devnets and testnets to ensure their stability under different network conditions, with plans to promote them to mainnet after we validate their safety. This remains our top priority and we'll continue to post updates with our ongoing progress.
Stability of block production and transaction inclusion are back to acceptable levels. We have deployed and confirmed reliability of several improvements to our block builder and transaction processing infrastructure, please reach out in discord with any issues.
Stability of block production and transaction inclusion are back to acceptable levels. We have deployed and confirmed reliability of several improvements to our block builder and transaction processing infrastructure, please reach out in discord with any issues.
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