Where does the bug appear (feature/product)? Cursor IDE Describe the Bug I am using cursor-nightly and want to work with Slack integration (MCP). But it seems I can not connect it. Steps to Reproduce Try to connect Slack in cloud agents Expected Behavior Connection should work Operating System …

Hi @Eugen_Konkov , The Slack connection flow for Cloud Agents doesn’t differ between nightly and stable builds, so this is likely a general Slack integration issue rather than something nightly-specific. To help narrow down what’s happening, could you share what you see after clicking “Reconnect”? …

[image] I also got this answer: [image]

Hi @Eugen_Konkov , Thanks for sharing those screenshots. The error is clear: when connecting the Slack MCP on nightly, the OAuth redirect uses cursor-nightly:// as the protocol, but Slack’s app configuration only accepts cursor://. That’s why the authorization fails with “redirect_uri did not match …

[image] [image] [image] Once linked: [image] [image] It does nothing. Also I expect a bit different integration: when I open chat in cursor and asks to “analyze some messages in channels and/or perform some actions based on that”. Cursor IDE still can not communicate with Slack: [imag…

Yes, please add both cursor:// and cursor-nightly:// as allowed.

Another issue is that Cursor integrated with Slack, where Slack is integrated with Jira, and Cursor integrated with Jira, can not complete request to post Jira ticket, though from Cursor I am able to do that, also from Slack I can manipulate tickets in Jira. [image]

To clarify the two Slack integrations: Cloud Agents Slack (the dashboard connection you set up): This enables Slack-to-Cursor interactions, where you tag @Cursor in a Slack channel to trigger a cloud agent. It’s working as expected, but it sounds like that’s not the workflow you’re after. Slac…

@Eugen_Konkov The cursor-nightly:// redirect URI issue has been fixed on our side. You should now be able to connect the Slack MCP directly from Cursor Nightly without hitting the “redirect_uri did not match” error.

I still see the same error, I posted 7days earlier.

Slack integration does not work with cursor-nightly

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Eugen_Konkov (Eugen) April 7, 2026, 11:32pm 20

The second: There is no such setting: Settings > General > Release channel
Please do not give me advice after which I can not recover….

NightlyCursor+Slack MCP plugin still does not work

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Slack integration does not work with cursor-nightly

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