Slack incident
Authorization Failure Errors Connecting to the Slack MCP Sever
Resolved after 1 hour 5 minutes, affecting Apps/Integrations/APIs, on March 23, 2026.
We have resolved the issue that was causing users to experience authorization failures when connecting certain third-party integrations to Slack. We apologize for any inconvenience this may have caused and thank you for your patience.
Affected components
Update timeline
- investigating Mar 23, 2026, 02:40 AM UTC
We are aware that customers are receiving authorization failure errors when trying to connect to the Slack MCP server. We are currently investigating the issue and will provide an update as soon as more information becomes available. We're very sorry for any inconvience this may be causing your business.
- investigating Mar 23, 2026, 03:05 AM UTC
We continue to investigate the issue. At this time, it appears the impact is affecting users of certain third party Slack integrations. We’ll continue to provide updates as more information becomes available, and we apologize for any inconvenience this may be causing.
- resolved Mar 23, 2026, 03:46 AM UTC
We have resolved the issue that was causing users to experience authorization failures when connecting certain third-party integrations to Slack. We apologize for any inconvenience this may have caused and thank you for your patience.
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