MCP Server

Slack MCP Server

Name: Slack MCP Server
Author: io.github.mindstone

io.github.mindstone/mcp-server-slack

Repository Registry

What is the Slack MCP server?

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

How to install Slack

Copy-paste configuration for popular MCP clients.

transport: stdio

Config generated by PluginBench — verify against the source before use.

Environment / auth

SLACK_CONFIG_PATH
required
Path to the host-managed Slack config directory
SLACK_TEAM_ID
required
Slack workspace team ID (one process per workspace)
SLACK_CLIENT_ID
Slack OAuth Connected App client ID. Only required to refresh a rotating token; saved non-rotating tokens authorize the Slack API without it.
SLACK_CLIENT_SECRET
secret
Slack OAuth Connected App client secret. Only required to refresh a rotating token; saved non-rotating tokens authorize the Slack API without it.
SLACK_DISABLE_REFRESH
Set to 1 to disable token refresh on this surface (cloud surface)
SLACK_REQUEST_TIMEOUT_MS
Override the upstream timeout (max 300000ms = 5 min)
SLACK_MAX_RETRIES
WebClient retries on transient failures (0-20). Lower this on cloud to avoid stacking long retry budgets into multi-minute hangs.

Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json

{
  "mcpServers": {
    "mcp-server-slack": {
      "command": "npx",
      "args": [
        "-y",
        "@mindstone/mcp-server-slack"
      ],
      "env": {
        "SLACK_CONFIG_PATH": "<YOUR_SLACK_CONFIG_PATH>",
        "SLACK_TEAM_ID": "<YOUR_SLACK_TEAM_ID>",
        "SLACK_CLIENT_ID": "<YOUR_SLACK_CLIENT_ID>",
        "SLACK_CLIENT_SECRET": "<YOUR_SLACK_CLIENT_SECRET>",
        "SLACK_DISABLE_REFRESH": "<YOUR_SLACK_DISABLE_REFRESH>",
        "SLACK_REQUEST_TIMEOUT_MS": "<YOUR_SLACK_REQUEST_TIMEOUT_MS>",
        "SLACK_MAX_RETRIES": "<YOUR_SLACK_MAX_RETRIES>"
      }
    }
  }
}

Cursor

~/.cursor/mcp.json

{
  "mcpServers": {
    "mcp-server-slack": {
      "command": "npx",
      "args": [
        "-y",
        "@mindstone/mcp-server-slack"
      ],
      "env": {
        "SLACK_CONFIG_PATH": "<YOUR_SLACK_CONFIG_PATH>",
        "SLACK_TEAM_ID": "<YOUR_SLACK_TEAM_ID>",
        "SLACK_CLIENT_ID": "<YOUR_SLACK_CLIENT_ID>",
        "SLACK_CLIENT_SECRET": "<YOUR_SLACK_CLIENT_SECRET>",
        "SLACK_DISABLE_REFRESH": "<YOUR_SLACK_DISABLE_REFRESH>",
        "SLACK_REQUEST_TIMEOUT_MS": "<YOUR_SLACK_REQUEST_TIMEOUT_MS>",
        "SLACK_MAX_RETRIES": "<YOUR_SLACK_MAX_RETRIES>"
      }
    }
  }
}

Windsurf

~/.codeium/windsurf/mcp_config.json

{
  "mcpServers": {
    "mcp-server-slack": {
      "command": "npx",
      "args": [
        "-y",
        "@mindstone/mcp-server-slack"
      ],
      "env": {
        "SLACK_CONFIG_PATH": "<YOUR_SLACK_CONFIG_PATH>",
        "SLACK_TEAM_ID": "<YOUR_SLACK_TEAM_ID>",
        "SLACK_CLIENT_ID": "<YOUR_SLACK_CLIENT_ID>",
        "SLACK_CLIENT_SECRET": "<YOUR_SLACK_CLIENT_SECRET>",
        "SLACK_DISABLE_REFRESH": "<YOUR_SLACK_DISABLE_REFRESH>",
        "SLACK_REQUEST_TIMEOUT_MS": "<YOUR_SLACK_REQUEST_TIMEOUT_MS>",
        "SLACK_MAX_RETRIES": "<YOUR_SLACK_MAX_RETRIES>"
      }
    }
  }
}

VS Code

.vscode/mcp.json

{
  "servers": {
    "mcp-server-slack": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@mindstone/mcp-server-slack"
      ],
      "env": {
        "SLACK_CONFIG_PATH": "<YOUR_SLACK_CONFIG_PATH>",
        "SLACK_TEAM_ID": "<YOUR_SLACK_TEAM_ID>",
        "SLACK_CLIENT_ID": "<YOUR_SLACK_CLIENT_ID>",
        "SLACK_CLIENT_SECRET": "<YOUR_SLACK_CLIENT_SECRET>",
        "SLACK_DISABLE_REFRESH": "<YOUR_SLACK_DISABLE_REFRESH>",
        "SLACK_REQUEST_TIMEOUT_MS": "<YOUR_SLACK_REQUEST_TIMEOUT_MS>",
        "SLACK_MAX_RETRIES": "<YOUR_SLACK_MAX_RETRIES>"
      }
    }
  }
}

Claude Code

claude mcp add mcp-server-slack --env SLACK_CONFIG_PATH=<YOUR_SLACK_CONFIG_PATH> --env SLACK_TEAM_ID=<YOUR_SLACK_TEAM_ID> --env SLACK_CLIENT_ID=<YOUR_SLACK_CLIENT_ID> --env SLACK_CLIENT_SECRET=<YOUR_SLACK_CLIENT_SECRET> --env SLACK_DISABLE_REFRESH=<YOUR_SLACK_DISABLE_REFRESH> --env SLACK_REQUEST_TIMEOUT_MS=<YOUR_SLACK_REQUEST_TIMEOUT_MS> --env SLACK_MAX_RETRIES=<YOUR_SLACK_MAX_RETRIES> -- npx -y @mindstone/mcp-server-slack

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