Major incident

Buildkite: Increased latency on REST and GraphQL APIs

Affected: REST API, Remote MCP Server

Current status of Buildkite: Operational — live Buildkite status

Timeline

1. Jun 11, 2026, 23:18 UTC
   investigating
   We're observing increased latency for all our customers. We're currently investigating and will provide status updates as they become available.
2. Jun 11, 2026, 23:49 UTC
   monitoring
   We've isolated the issue to elevated load on our REST API service and are working to mitigate. The agent and stacks API isn’t affected.
3. Jun 11, 2026, 23:51 UTC
   monitoring
   We've isolated the issue to elevated load on our REST API service and have mitigated the issue. The agent and stacks API isn’t affected.
4. Jun 12, 2026, 00:16 UTC
   resolved
   The mitigation applied before the last update had the intended effect, and we have seen recovery in REST API latency.

Updates as published by Buildkite (original).