Slack Plugin

This repository contains the configuration needed to integrate Slack with Cursor IDE and Claude Code. The plugin enables your agents to interact directly with your Slack workspace, allowing you to search messages, send communications, manage canvases, and more—all through natural language.

Features

The Slack MCP server provides the following capabilities:

• Search: Find messages, files, users, and channels (both public and private)
• Messaging: Send messages, retrieve channel histories, and access threaded conversations
• Canvas: Create and share formatted documents, export content as markdown
• User Management: Retrieve user profiles including custom fields and status information

Prerequisites

Before setting up the Slack MCP server, ensure you have:

• Cursor IDE or Claude Code CLI installed
• Access to a Slack workspace with MCP integration approved by your workspace admin

Installation

Choose the installation method for your IDE:

Claude Code

If you're using Claude Code CLI, you can install this as a plugin by cloning it locally:

git clone https://github.com/slackapi/slack-mcp-plugin.git
cd slack-mcp-plugin
claude --plugin-dir ./

The Slack MCP server will be automatically configured when the plugin loads. You will be prompted to authenticate into your Slack workspace via OAuth.

The Claude plugin uses the following MCP configuration (.mcp.json):

{
  "mcpServers": {
    "slack": {
      "type": "http",
      "url": "https://mcp.slack.com/mcp",
      "oauth": {
        "clientId": "1601185624273.8899143856786",
        "callbackPort": 3118
      }
    }
  }
}

Cursor

You can use the following Add to Cursor button or follow the steps below to manually configure the Slack MCP server in Cursor:

Step 1: Open Cursor Settings

Navigate to Cursor → Settings → Cursor Settings (or use the keyboard shortcut Cmd+, on macOS, Ctrl+, on Windows/Linux).

Step 2: Navigate to MCP Tab

In the Settings interface, click on the MCP tab to access MCP server configurations.

Step 3: Add Slack MCP Configuration

Add the following configuration to connect to the remote Slack MCP server:

{
  "mcpServers": {
    "slack": {
      "url": "https://mcp.slack.com/mcp",
      "auth": {
        "CLIENT_ID": "3660753192626.8903469228982"
      }
    }
  }
}

Save the configuration. You will also see a connect button once added. Click that to authenticate into your Slack Workspace.

Usage Examples

Once configured, you can interact with Slack through your AI assistant using natural language:

• Search messages: "Search for messages about the product launch in the last week"
• Send messages: "Send a message to #general channel saying the deployment is complete"
• Find users: "Who is the user with email john@example.com?"
• Access threads: "Show me the conversation thread from that message"
• Create canvases: "Create a canvas document with our meeting notes"

Documentation & Resources

• Official Slack MCP Server Documentation

Notes & Limitations

• Remote server only: This configuration connects to Slack's hosted MCP server. No local installation is required or supported.
• Admin approval required: Your Slack workspace administrator must approve MCP integration before you can use this feature.

Questions or Issues?

For questions about the Slack MCP server or integration issues, please refer to the official Slack documentation or contact your workspace administrator.