| name | slack-automation |
| description | Automate Slack workspace operations including messaging, search, channel management, and reaction workflows through Composio's Slack toolkit. |
| type | skill |
| created | 2026-02-27T00:00:00.000Z |
| domain | productivity |
| category | automation |
| risk | critical |
| source | community |
| tags | ["skill","productivity","automation","slack"] |
Slack Automation via Rube MCP
Automate Slack workspace operations including messaging, search, channel management, and reaction workflows through Composio's Slack toolkit.
Prerequisites
- Rube MCP must be connected (RUBE_SEARCH_TOOLS available)
- Active Slack connection via
RUBE_MANAGE_CONNECTIONS with toolkit slack
- Always call
RUBE_SEARCH_TOOLS first to get current tool schemas
Setup
Get Rube MCP: Add https://rube.app/mcp as an MCP server in your client configuration. No API keys needed — just add the endpoint and it works.
- Verify Rube MCP is available by confirming
RUBE_SEARCH_TOOLS responds
- Call
RUBE_MANAGE_CONNECTIONS with toolkit slack
- If connection is not ACTIVE, follow the returned auth link to complete Slack OAuth
- Confirm connection status shows ACTIVE before running any workflows
Core Workflows
1. Send Messages to Channels
When to use: User wants to post a message to a Slack channel or DM
Tool sequence:
SLACK_FIND_CHANNELS - Resolve channel name to channel ID [Prerequisite]SLACK_LIST_ALL_CHANNELS - Fallback if FIND_CHANNELS returns empty/ambiguous results [Fallback]SLACK_FIND_USERS - Resolve user for DMs or @mentions [Optional]SLACK_OPEN_DM - Open/reuse a DM channel if messaging a user directly [Optional]SLACK_SEND_MESSAGE - Post the message with resolved channel ID [Required]SLACK_UPDATES_A_SLACK_MESSAGE - Edit the posted message if corrections needed [Optional]
Key parameters:
channel: Channel ID or name (without '#' prefix)markdown_text: Preferred field for formatted messages (supports headers, bold, italic, code blocks)text: Raw text fallback (deprecated in favor of markdown_text)thread_ts: Timestamp of parent message to reply in a threadblocks: Block Kit layout blocks (deprecated, use markdown_text)
Pitfalls:
