🎉️ Welcome to the new home of Slack developer docs! 🎉️
We're still building and not all features are available quite yet. Enjoy this peek into the future! You can return to the past at api.slack.com.

Docs Reference Samples Tools

Changelog Developer Program Your apps

Deno Slack SDK
Getting started
Creating an app
Using the app manifest
Functions
Creating workflows
Triggers
Datastores
Data types
Interactivity
Development & deployment
Removing an app
Deno & TypeScript
Reference
Tutorials

Reference
Slack functions
update_channel_topic

update_channel_topic

Facts
Input parameters
Output parameters
Usage info

API Terms of Service Privacy Information Developer Support Developer Policy Provide Feedback

©2025 Slack Technologies, LLC, a Salesforce company. All rights reserved. Various trademarks held by their respective owners.