API Degraded Performance

June 18, 2026 16:04 UTC
Investigating - Let's Encrypt's production API is experiencing degraded performance. Some clients may encounter 400 and 500 error responses. Most clients are still succeeding.

June 18, 2026 16:35 UTC
Investigating - We re-routed traffic to bring success rates back to normal after an upstream network event disrupted traffic between two datacenters.

June 19, 2026 04:45 UTC
Investigating - We're operating normally, but with reduced redundancy. We continue to work with our upstream ISP to identify and resolve the issue.