Mainnet Flashblocks WebSocket Connection Instability

Incident Report for Base

Resolved

We have made improvements to the handling of rate limits in order to provide a more stable endpoint for Flashblocks.
Posted Nov 17, 2025 - 15:34 UTC

Identified

We have identified bottlenecks with the Websocket endpoints distributing Flashblocks. Between Nov 5-10, several changes were made that reduced connection drops by 50%. However, investigation continues in order to further reduce connection instability and lower the latency in receiving messages.

Updates will be posted here as progress is made.
Posted Nov 12, 2025 - 05:38 UTC

Investigating

We are currently investigating degraded connection stability to the Base Mainnet WebSocket endpoint for Flashblocks `wss://mainnet.flashblocks.base.org/ws`. Applications and nodes may experience intermittent connection drops to that endpoint.
Posted Nov 04, 2025 - 15:32 UTC
This incident affected: Mainnet (Flashblocks).
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