Slack MCP Server

The Slack MCP server enables AI agents to interact with Slack workspaces using a Bot User OAuth Token.

Features

• Messaging: Post messages to public/private channels or DMs.
• Organization: List channels and users in the workspace.
• Context: Fetch conversation history and user profiles.
• Identity: Verify authentication and bot details.

Configuration

Add the following to your MCP client configuration:

json
{
  "mcpServers": {
    "slack": {
      "url": "https://mcppure.shraj.workers.dev/mcp-server/slack",
      "headers": {
        "x-slack-bot-token": "xoxb-your-bot-token"
      }
    }
  }
}

How to get Credentials

1. Slack Apps: Go to the Slack API Dashboard.
2. Create App: Create a new app "From scratch".
3. Permissions: Under OAuth & Permissions, add chat:write, channels:read, users:read, groups:read, im:read, and mpim:read scopes.
4. Install: Install the app to your workspace.
5. Bot Token: Copy the Bot User OAuth Token (starts with xoxb-).

Tools

Messaging

• post_message: Send a message or structured blocks to a channel.
• get_channel_history: Fetch recent messages from a conversation.

Workspace Discovery

• list_channels: List all available channels in the team.
• list_users: List all members of the Slack team.
• get_user_info: Get profile details for a specific user.

Identity

• whoami: Verify authentication and get bot user details.