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Post in External Slack Channels: A Quick Guide | Clay

Post in External Slack Channels: A Quick Guide

·Jul 24, 2025 08:30 AM·

Hi there, is there a way to get Slack to post to External connections rather than a channel in my own Slack - a client has invited me to her channel and I want to post in there. Many thanks

10 comments

· Sorted by Oldest

Clay
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Yes, you can send messages to external Slack channels using our Slack integration. The "Send Message to Channel" action allows you to post messages to any Slack channel you have access to, including channels in external workspaces where you've been invited. To set this up, you'll need to connect your Slack account through Settings > Connections or via any integration panel using OAuth authentication. Once connected, you can specify the target Slack channel name in the Slack Channel field when configuring the action. Are you currently able to access and post messages manually in your client's Slack channel through the regular Slack interface?
Sources: Send Message to Channel with Slack Slack integration overview | Documentation | Clay University Slack integration | Documentation | Clay University
Matt W.
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I pasted the Channel ID in and get this: The integration failed to run {"ok":false,"error":"channel_not_found","warning":"missing_charset","response_metadata":{"warnings":["missing_charset"]}}
Matt W.
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I can paste to the channels in my Slack absolutely fine
Matt W.
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Scrap that - I had to add Clay as a bot
Matt W.
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All good
Muhammad S.
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No, you cant
Muhammad S.
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you need enhanced permissions to do that
Muhammad S.
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best way - ask them to create a webhook for you so you can just post to that webhook They dont have to give you any permissions in that case
Matt W.
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I managed to work it - by adding Clay as a bot to the channel - thanks for the tips
Munnawar H.
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Glad you were able to work that out. I'll close this ticket out now!