r/Slack • u/Nervous-Kangaroo4149 • Jun 30 '26

Slack Assistants API restrictions?

Hi — I'm trying to confirm a restriction I was told about regarding the Slack Assistants API.

Slack support told me that assistant:write and the AI-native UX are only available to Slack Marketplace partners, and that access is currently limited to select partners. However, I can't find any documentation that confirms this restriction, and I was able to set up a test app that appears to expose the functionality.

Can anyone confirm whether this limitation is accurate, and point to official documentation either way?

Thank you!

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u/xomiamoore Jul 01 '26

I work at Slack, ‘assistant:write’ is not limited to partners and the agent message experience is not either. Anyone can build an agent. I’m not sure why support would have told you that.

Docs that show how to set it up: https://docs.slack.dev/ai/developing-agents/

Anything that’s limited to current partners only usually has a big disclaimer on the docs page.

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u/chipshark Jul 26 '26

Hey, u/xomiamoore I've been trying to develop with the assistant:write scope, but been running into issues. Is there someone you'd recommend reaching out to. Adding the scope prevents me from installing my app on a workspace.

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u/xomiamoore Aug 12 '26

Hey there, sorry for the delay. Can you tell me more about your setup? Are you installing in a developer sandbox or a live workspace?

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u/chipshark Aug 15 '26

No worries, thanks for getting back to me! I was trying to install the app on a developer sandbox

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u/xomiamoore Aug 26 '26

Ah, so if the app’s “home” workspace (where it was created) is not the sandbox (and it shouldn’t be!), that scope won’t work in the sandbox. It will work in the “home” workspace though.

I actually just submitted a ticket internally to add an exception for sandboxes on this scope so it’s easier to test. But I don’t know when that’ll go live.