Slack MCP Server

by jtalk22io.github.jtalk22/slack-mcp-serverv5.1.0

Catch up on Slack without reading it. Unreads, threads, search. Browser-session or hosted OAuth.

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Active2d ago

Install Slack MCP server

claude mcp add slack -e SLACK_TOKEN='<slack-token>' -e SLACK_COOKIE='<slack-cookie>' -- npx -y @jtalk22/slack-mcp

{
  "mcpServers": {
    "slack": {
      "command": "npx",
      "args": [
        "-y",
        "@jtalk22/slack-mcp"
      ],
      "env": {
        "SLACK_TOKEN": "<slack-token>",
        "SLACK_COOKIE": "<slack-cookie>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "slack": {
      "command": "npx",
      "args": [
        "-y",
        "@jtalk22/slack-mcp"
      ],
      "env": {
        "SLACK_TOKEN": "<slack-token>",
        "SLACK_COOKIE": "<slack-cookie>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "slack": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@jtalk22/slack-mcp"
      ],
      "env": {
        "SLACK_TOKEN": "<slack-token>",
        "SLACK_COOKIE": "<slack-cookie>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "slack": {
      "command": "npx",
      "args": [
        "-y",
        "@jtalk22/slack-mcp"
      ],
      "env": {
        "SLACK_TOKEN": "<slack-token>",
        "SLACK_COOKIE": "<slack-cookie>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
SLACK_TOKEN	—	yes	Slack xoxc- token from browser session
SLACK_COOKIE	—	yes	Slack xoxd- cookie from browser session

Remote endpoints

streamable-httphttps://mcp.revasserlabs.com/oauth/mcp

Freshness

Active — last maintenance signal 2d ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-10-08 · 2d ago · GitHub
Latest release
2026-10-07 · 2d ago · GitHub · v5.1.0
Package published
no data · npm/PyPI
Registry entry updated
2026-10-07 · 2d ago · official registry · v5.1.0

FAQ

›How do I install the Slack MCP server in Claude Code?

Run: claude mcp add slack -e SLACK_TOKEN='<slack-token>' -e SLACK_COOKIE='<slack-cookie>' -- npx -y @jtalk22/slack-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Slack require an API key?

Yes. It expects SLACK_TOKEN, SLACK_COOKIE, of which 2 are secrets.

›Can I use Slack as a remote (hosted) MCP server?

Yes — it offers both a hosted endpoint and a local stdio package.

›Is Slack in the official MCP registry?

Yes, as io.github.jtalk22/slack-mcp-server.