Slack MCP

What it does

Slack MCP provides AI agents with direct access to Slack workspaces using browser session tokens (xoxc/xoxd). This allows for seamless interaction with DMs, channels, and mentions without the friction of creating official Slack apps or requesting administrator permissions.

Tools

• check-unreads: Retrieves unread messages across DMs, channels, and mentions.
• catch-up: Fetches recent channel activity with customizable time filtering.
• list-channels: Browses available channels and workspace membership.
• check-mentions: Groups @-mentions by urgency for quick triage.
• search: Performs full-text searches using standard Slack query syntax.
• get-context: Retrieves thread history to provide conversation context.
• send-message: Posts messages to channels, direct messages, or existing threads.
• mark-read: Marks conversations as read (the only tool that triggers read receipts).
• react: Adds or removes emoji reactions to messages.
• auth-setup: Automated browser-based token extraction for easy setup.

Installation

For Claude Desktop, use the provided .mcpb binary from the releases page, or add via config:

{
  "mcpServers": {
    "slack-mcp": {
      "command": "npx",
      "args": ["-y", "@aaronsb/slack-mcp"]
    }
  }
}

Supported hosts

• claude
• cursor