Slack

io.github.mindstone/mcp-server-slack

Slack MCP server: channels, messages, threads, reactions, users, files, and scheduled messages

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Connect this server

Add this to your MCP client config — claude_desktop_config.json (Claude Desktop) or .cursor/mcp.json (Cursor).Suits: Claude Desktop · Cursor.

{
  "mcpServers": {
    "mcp-server-slack": {
      "command": "npx",
      "args": [
        "-y",
        "@mindstone/mcp-server-slack@0.3.7"
      ],
      "env": {
        "SLACK_CONFIG_PATH": "<your SLACK_CONFIG_PATH>",
        "SLACK_TEAM_ID": "<your SLACK_TEAM_ID>",
        "SLACK_CLIENT_SECRET": "<your SLACK_CLIENT_SECRET>",
        "SLACK_REQUEST_TIMEOUT_MS": "60000",
        "SLACK_MAX_RETRIES": "10"
      }
    }
  }
}
Environment variables
  • SLACK_CONFIG_PATHrequiredPath to the host-managed Slack config directory
  • SLACK_TEAM_IDrequiredSlack workspace team ID (one process per workspace)
  • SLACK_CLIENT_SECRETsecretSlack OAuth Connected App client secret. Only required to refresh a rotating token; saved non-rotating tokens authorize the Slack API without it.
  • SLACK_REQUEST_TIMEOUT_MSOverride the upstream timeout (max 300000ms = 5 min)
  • SLACK_MAX_RETRIESWebClient retries on transient failures (0-20). Lower this on cloud to avoid stacking long retry budgets into multi-minute hangs.

A starting point — check the repository for exact arguments and setup. Restart your client after editing the config.

Category
Developer Tools
Version
0.3.7
Registry
active
Published
11/6/2026

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Add the badge to your site

Show visitors that Slack is listed here — it’s also the link we check for a free listing.

Slack — listed on Serverdex

HTML — for your website

<a href="https://serverdex.io/server/io-github-mindstone-mcp-server-slack?utm_source=badge"><img src="https://serverdex.io/brand/badge.svg" alt="Slack — listed on Serverdex" width="123" height="40" loading="lazy"></a>

Recommended. A dofollow link from your own domain is the one that counts for search engines, and it's the link we check for a free listing.

Markdown — for your README

[![Slack — listed on Serverdex](https://serverdex.io/brand/badge.svg)](https://serverdex.io/server/io-github-mindstone-mcp-server-slack?utm_source=badge)

Nice for visibility, but GitHub marks README links nofollow, so it doesn't pass authority. Use the HTML badge on your site as well.