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slack.com

Set Slack channel topic

Automatically set Slack channel topic on slack.com. Set a channel's topic (the short line shown in the header) by name or id. Topics are limited to 250 characters, and a longer one is refused up front rather than part-way through. Pass an empty string to clear the topic. Returns the applied topic. Requires login.

Input

topic required

New topic text, up to 250 characters (empty clears).

channel required

Channel name/#name or id (C…).

workspaceDomain optional

Workspace host, e.g. acme.slack.com. Defaults to the active workspace.

Output

ok required
channel required
topic optional

FAQ

Set a channel's topic (the short line shown in the header) by name or id. Topics are limited to 250 characters, and a longer one is refused up front rather than part-way through. Pass an empty string to clear the topic. Returns the applied topic. Requires login.
Ask an AI agent connected to Reduck to run reduck/slack.com/set_channel_topic, or run it from a terminal with the Reduck CLI: npx @reduck-ai/cli@latest run --script reduck/slack.com/set_channel_topic
You do not need one. "Set Slack channel topic" drives the real slack.com pages in a browser, so it works whether or not slack.com offers an API for this.
Required: channel, topic. Optional: workspaceDomain.
It returns ok, topic, channel.
Yes. It acts as you on slack.com: on your own Chrome it reuses your session, and on a Reduck-hosted browser it loads the slack.com cookies saved by the Reduck extension.
It makes changes on slack.com, like sending, posting, booking or buying something.
Ask an AI agent connected to Reduck to run reduck/slack.com/set_channel_topic, or run it from a terminal with the Reduck CLI: npx @reduck-ai/cli@latest run --script reduck/slack.com/set_channel_topic
It is part of Reduck's official curated catalogue.

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