Outage in Slack

Authorization Failure Errors Connecting to the Slack MCP Sever

Resolved Minor

March 22, 2026 - Started about 11 hours ago - Lasted about 1 hour
Official incident page

Incident Report

Summary AI Generated

Customers experienced authorization failure errors when attempting to connect to the Slack MCP server, affecting third-party Slack integrations and the Apps/Integrations/APIs component. The incident lasted 1.1 hours while Slack investigated and resolved the connectivity issues.

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.

Components affected

Slack Apps/Integrations/APIs

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Latest Updates ( sorted recent to last )

about 11 hours ago - at 03/23/2026 03:05AM

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.

about 11 hours ago - at 03/23/2026 02:40AM

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