Slack MCP Server: Install & Setup

Install Slack in Claude Code

Claude Code

claude mcp add aaronsb-slack -- npx -y @aaronsb/slack-mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

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

Frequently asked questions

What does the Slack MCP server do?

Read and write Slack with session tokens — no OAuth, no bot, no admin approval.

Is the Slack MCP server free?

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Does Slack run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add Slack to Claude Code?

Run: claude mcp add aaronsb-slack -- npx -y @aaronsb/slack-mcp

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