App Logo
slack.com

Set Slack channel topic

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.
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 or booking 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.

Related scripts

slack.com

Search Slack messages

Full-text search across the workspace's messages, supporting Slack's modifiers (from:@user, in:#channel, before:/after:date, "exact phrase"). One page per call. Requires login.

slack.com

List Slack invoices

List Slack billing statements from the workspace's admin billing history. Returns workspace, total and invoices (date, statement, billId, amount, status, description, pdfUrl) — metadata only. Feed a row's pdfUrl (or billId) to slack.com/download_invoice to fetch that statement's PDF. Requires a workspace billing admin; defaults to the primary workspace, or pass workspaceDomain (e.g. acme.slack.com).

slack.com

Send Slack message

Post a message to a channel or DM, identified by name ('social', '#social'), channel/DM id (C…/D…), or a user (@handle or U…) for a direct message. Pass threadTs to reply inside a thread (with broadcast to also send it to the channel). Returns the new message ts, channel id and permalink. Requires login.

Start building not clicking

Get started for free