Creating Slack functions | Slack Developer Docs deno_slack_sdk Skip to main content Guides Reference Samples Tools Changelog Dev Program MANAGE APPS * Overview * Community-developed tools * Slack MCP and Skills Plugin * Sandboxes * Deno Slack SDK * Getting started * Creating an app * Using the app manifest * Functions * Creating functions * Creating Slack functions * Creating custom functions * Controlling access to custom functions * Creating connector functions * Calling Slack API methods * Integrating with services requiring external authentication * Creating workflows * Triggers * Datastores * Data types * Interactivity * Development & deployment * Deno & TypeScript * Reference * Tutorials * Java libraries * JavaScript libraries * Python libraries * Slack CLI * Slack GitHub Action * * Deno Slack SDK * Functions * Creating Slack functions Copy as markdown On this page Creating Slack functions Workflow apps require a paid plan Join the Developer Program and provision a sandbox with access to all Slack features for free. Slack functions are essentially Slack-native actions, like creating a channel or sending a message. Use them alongside your custom functions in a workflow . Browse our inventory of Slack functions . Slack functions need to be imported from the standard library built into the Deno Slack SDK —all Slack functions are children of the Schema.slack.functions object. Just like custom functions, Slack functions can be added to steps in a workflow using the addStep method. Slack functions define their own inputs and outputs, as detailed for each Slack function in the catalog below. Slack functions catalog ​ The details for each Slack function can be found in our reference documentation . Slack function example ​ Here's an example of a workflow that creates a new Slack channel using the CreateChannel Slack function: import { DefineWorkflow , Schema } from "deno-slack-sdk/mod.ts" ; // Define a workflow that can pass the parameters for the Slack function const myWorkflow = DefineWorkflow ( { callback_id : "channel-creator" , title : "Channel Creator" , input_parameters : { properties : { channel_name : { type : Schema . types . string } } , required : [ "channel_name" ] , } , } ) ; const createChannelStep = myWorkflow . addStep ( Schema . slack . functions . CreateChannel , { channel_name : myWorkflow . inputs . channel_name , is_private : false , } , ) ; export default myWorkflow ; Timeouts for functions ​ When building workflows using functions, there is a 60 second timeout for a deployed function and a 15 second timeout for a locally-run function. For deployed functions using a block_suggestion , block_actions , view_submission , or view_closed payload, there is a 10 second timeout. If a function has not finished running within its respective time limit, you will see an error in your log. Refer to logging for more details. ➡️ To learn how to add a Slack function to a workflow , head to the workflows section. ➡️ To browse all Slack functions , head to the Slack Function reference catalog ✨ To learn how to create your own custom functions , head to the custom functions section. Previous Creating functions Next Creating custom functions Copy as markdown * Slack functions catalog * Slack function example * Timeouts for functions . * Tools * Slack CLI * Bolt frameworks * Slack SDKs * Block Kit Builder * Developer program * Code samples & tutorials * LLM? Read llms.txt * All tools Learn * Learning paths * Workshops * Slack certifications * Trailhead * Resource library * All learning resources Community * Slack community * Slack events Resources * Docs * Blog * Slack marketplace * Developer newsletter Manage Apps * Your apps * Status * Privacy * Terms * Cookie Preferences * Support * Changelog * Your Privacy Choices © 2026 Slack Technologies, LLC, a Salesforce company. All rights reserved. Various trademarks held by their respective owners. * * *