Slack Workspace Agentic Workflow

Browser: Post Message — Slack Workspace Automation Workflow

Navigate to a Slack channel, type a message, and send it

Available free v1.0.0 Browser

$ sidebutton install slack.com

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Navigate to a Slack channel, type a message, and send it

slack_browser_post_message.yaml

Workflow Definition

YAML source for the slack_browser_post_message.yaml workflow. This is the complete definition executed by the SideButton MCP server when Slack Workspace agents run this automation.

schema_version: 1
version: "1.0.0"
last_verified: "2026-02-09"
id: slack_browser_post_message
title: "Browser: Post Message"
description: "Navigate to a Slack channel, type a message, and send it"
category:
  level: task
  domain: ops
  reusable: true
params:
  channel: string
  message: string
steps:
  - type: browser.navigate
    url: "{{env.SLACK_BROWSER_URL}}/{{channel}}"

  - type: browser.wait
    ms: 3000

  - type: browser.click
    selector: "[data-qa='message_input'] .ql-editor, .c-wysiwyg_container [contenteditable='true']"

  - type: browser.type
    selector: "[data-qa='message_input'] .ql-editor, .c-wysiwyg_container [contenteditable='true']"
    text: "{{message}}"

  - type: browser.key
    key: "Enter"

  - type: browser.wait
    ms: 1000

  - type: browser.snapshot
    as: result

How To Run

Install the Slack Workspace knowledge pack into your SideButton agent, then dispatch this workflow by its ID slack_browser_post_message.yaml. Agents invoke it directly via the MCP protocol or through the portal.

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