Slack

MCP server · by aaronsb

Communication npm v2.8.1

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

View source ↗ Website ↗ Generate config for multiple servers More servers

Install

Pin version registry version 2.8.1

npm
npx -y @aaronsb/slack-mcp

npm
npx -y @aaronsb/slack-mcp@2.8.1

Setup by client

Pick your client — the config below is generated for this server (local stdio). Copy respects the “Pin version” switch above.

claude_desktop_config.json

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

{
  "mcpServers": {
    "slack-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@aaronsb/slack-mcp@2.8.1"
      ]
    }
  }
}

Format verified against the official Claude Desktop docs ↗.

terminal

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

claude mcp add slack-mcp -- npx -y @aaronsb/slack-mcp@2.8.1

Format verified against the official Claude Code docs ↗.

.cursor/mcp.json

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

{
  "mcpServers": {
    "slack-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@aaronsb/slack-mcp@2.8.1"
      ]
    }
  }
}

Format verified against the official Cursor docs ↗.

.vscode/mcp.json

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

{
  "servers": {
    "slack-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@aaronsb/slack-mcp@2.8.1"
      ]
    }
  }
}

Format verified against the official VS Code docs ↗.

mcp_config.json

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

{
  "mcpServers": {
    "slack-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@aaronsb/slack-mcp@2.8.1"
      ]
    }
  }
}

Format verified against the official Windsurf docs ↗.

Environment variables

Defined in the server's official registry manifest. Required secrets are shown as <YOUR_…> placeholders in the configs above.

SLACK_MCP_XOXC_TOKEN — Slack session token. Optional — the auth tool extracts it from your browser and stores it in the config file.
SLACK_MCP_XOXD_TOKEN — Slack session cookie. Optional — the auth tool extracts it from your browser and stores it in the config file.

GitHub

⭐ 2 stars · 最近更新于 21 天前 · MIT license

About this server

Slack MCP MCP server that gives AI agents access to your Slack workspaces using session tokens. No OAuth apps, no bot permissions, no admin approval required. Beyond reading and writing messages, it accumulates a durable picture of the workspace — every channel and user's state over time, departures…

Summary from the project README — github.com/aaronsb/slack-mcp

Distributed as npm, listed under Communication. Review our MCP security guide before granting access to real data.

Frequently asked questions

What does the Slack MCP server do?

How do I install Slack?

Run the install command shown above, then paste the config for your client (Claude Desktop, Claude Code, Cursor, VS Code or Windsurf) into its MCP settings and restart the client.

Is Slack free to use?

The MCP server itself is free to install. The source is public on https://github.com/aaronsb/slack-mcp. Any third-party service it calls may require its own API key and account.

Which clients support Slack?

Any MCP-compatible client can use it, including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf and custom agents.

Add this badge

Publish this server? Link back with a badge on your README or site — copy either snippet.

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