freemcplab / Directory / Playground / Slack MCP (Korotovsky)

● Community korotovsky 🔑 Needs your key

Slack MCP (Korotovsky)

Name: Slack MCP (Korotovsky) MCP Server
Author: korotovsky

by korotovsky · korotovsky/slack-mcp-server

A Slack MCP that runs with user-tier tokens — no admin scopes required, no app install gate. Read, post, search.

Korotovsky's Slack MCP is the de-facto community implementation. Uses xoxc/xoxd browser tokens so individual users can self-onboard without org-wide app approval. Read channels, post, search history.

▶ Watch demo 📦 Install 💡 Use Cases

Why use it

Key features

User-tier tokens — no admin scopes
Channels list / read / post
Search across history
DMs and group DMs
Reactions and threads

Live Demo

What it looks like in practice

ready

Install

Pick your client

~/Library/Application Support/Claude/claude_desktop_config.json · Windows: %APPDATA%\Claude\claude_desktop_config.json

{
  "mcpServers": {
    "slack-mcp-korotovsky": {
      "command": "npx",
      "args": [
        "-y",
        "@korotovsky/slack-mcp-server"
      ],
      "env": {
        "SLACK_MCP_XOXC_TOKEN": "${SLACK_XOXC}",
        "SLACK_MCP_XOXD_TOKEN": "${SLACK_XOXD}"
      }
    }
  }
}

Open Claude Desktop → Settings → Developer → Edit Config. Restart after saving.

~/.cursor/mcp.json · .cursor/mcp.json

{
  "mcpServers": {
    "slack-mcp-korotovsky": {
      "command": "npx",
      "args": [
        "-y",
        "@korotovsky/slack-mcp-server"
      ],
      "env": {
        "SLACK_MCP_XOXC_TOKEN": "${SLACK_XOXC}",
        "SLACK_MCP_XOXD_TOKEN": "${SLACK_XOXD}"
      }
    }
  }
}

Cursor uses the same mcpServers schema as Claude Desktop. Project config wins over global.

VS Code → Cline → MCP Servers → Edit

{
  "mcpServers": {
    "slack-mcp-korotovsky": {
      "command": "npx",
      "args": [
        "-y",
        "@korotovsky/slack-mcp-server"
      ],
      "env": {
        "SLACK_MCP_XOXC_TOKEN": "${SLACK_XOXC}",
        "SLACK_MCP_XOXD_TOKEN": "${SLACK_XOXD}"
      }
    }
  }
}

Click the MCP Servers icon in the Cline sidebar, then "Edit Configuration".

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "slack-mcp-korotovsky": {
      "command": "npx",
      "args": [
        "-y",
        "@korotovsky/slack-mcp-server"
      ],
      "env": {
        "SLACK_MCP_XOXC_TOKEN": "${SLACK_XOXC}",
        "SLACK_MCP_XOXD_TOKEN": "${SLACK_XOXD}"
      }
    }
  }
}

Same shape as Claude Desktop. Restart Windsurf to pick up changes.

~/.continue/config.json

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

Continue uses an array of server objects rather than a map.

~/.config/zed/settings.json

{
  "context_servers": {
    "slack-mcp-korotovsky": {
      "command": {
        "path": "npx",
        "args": [
          "-y",
          "@korotovsky/slack-mcp-server"
        ]
      }
    }
  }
}

Add to context_servers. Zed hot-reloads on save.

claude mcp add slack-mcp-korotovsky -- npx -y @korotovsky/slack-mcp-server

One-liner. Verify with claude mcp list. Remove with claude mcp remove.

Use Cases

Real-world ways to use Slack MCP (Korotovsky)

Summarize a channel since yesterday

👤 Developers ⏱ ~15 min intermediate

When to use: You missed a busy channel and want a quick brief.

Flow

Pick channel

list_channels; choose.✓ Copied

→ channel_id
Pull recent

fetch_history since=yesterday.✓ Copied

→ Messages returned
Summarize

Claude produces a structured summary.✓ Copied

→ Catch-up done

Outcome: Standup-ready summary without scrolling.

Combinations

Pair with other MCPs for X10 leverage

slack-mcp-korotovsky + linear

Triage a Slack discussion into Linear tickets

Combine slack-mcp-korotovsky with linear: Triage a Slack discussion into Linear tickets✓ Copied

Tools

What this MCP exposes

Tool	Inputs	When to call	Cost
list_channels	(see docs)	List channels you can see	1 call
fetch_history	(see docs)	Pull messages from a channel	1 call
post_message	(see docs)	Post to a channel/DM	1 call
search	(see docs)	Search across history	1 call

Cost & Limits

What this costs to run

API quota: Slack API limits
Tokens per call: Message histories can be large — paginate
Monetary: Free
Tip: Use search instead of full history dumps

Security

Permissions, secrets, blast radius

Minimum scopes: user-tier tokens

Credential storage: xoxc/xoxd in env

Data egress: slack.com

Never grant: leak xoxd — it's a session token

Troubleshooting

Common errors and fixes

Token rotated

Re-extract xoxc/xoxd from your browser session

Alternatives