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MCP Server — Slack Workspace Agentic Knowledge Pack
Slack Workspace Skill for MCP Agent
Channel reading, message posting, and thread management for Slack
Available free v1.0.0 Browser
$
sidebutton install Slack Workspace
README
1.4 KB
Slack
Team messaging, channels, and thread management.
Browser Access
Requires login to Slack workspace in connected browser.
| Tool | Usage |
|---|---|
navigate | Go to channel or thread URL |
snapshot | Read messages and channel state |
click | Channels, threads, reactions, buttons |
type | Message compose, search |
Workflows
| Workflow | Description |
|---|---|
slack_browser_post_message | Navigate to channel, type and send message |
slack_browser_read_channel | Navigate to channel, snapshot recent messages |
Threads
- Reply in threads, not in the channel — keep channels scannable
- Threads with >10 messages: summarize before acting
- When creating tickets from Slack, always link to the original thread
Messaging
- Use @mentions sparingly — only for direct action items
- Keep messages concise — one topic per message
- Use emoji reactions to acknowledge without adding noise
Formatting
- Bullet points for lists and action items
- Bold key decisions or outcomes
- Code blocks for technical content
Gotchas
- Slack web app uses complex React rendering — selectors can be fragile
- Message compose uses contenteditable, not textarea
- Thread sidebar can overlay channel content
- Workspace switching changes the entire DOM