Slack

Slack is a local MCP server: Slack MCP server: channels, messages, threads, reactions, users, files, and scheduled messages. Install it from npm as @mindstone/mcp-server-slack.

Claude CodeCodexAntigravity

commandprompt

Terminal

claude mcp add mcp-server-slack -e SLACK_CONFIG_PATH=... -e SLACK_TEAM_ID=... -e SLACK_CLIENT_ID=... -e SLACK_CLIENT_SECRET=... -e SLACK_DISABLE_REFRESH=... -e SLACK_REQUEST_TIMEOUT_MS=... -e SLACK_MAX_RETRIES=... -e MCP_WORKSPACE_PATH=... -- npx -y @mindstone/mcp-server-slack

Run in your project folder. Add --scope user to use it everywhere.

Add to claude_desktop_config.json or .cursor/mcp.json.

{
  "mcpServers": {
    "mcp-server-slack": {
      "command": "npx",
      "args": [
        "-y",
        "@mindstone/mcp-server-slack"
      ],
      "env": {
        "SLACK_CONFIG_PATH": "...",
        "SLACK_TEAM_ID": "...",
        "SLACK_CLIENT_ID": "...",
        "SLACK_CLIENT_SECRET": "...",
        "SLACK_DISABLE_REFRESH": "...",
        "SLACK_REQUEST_TIMEOUT_MS": "...",
        "SLACK_MAX_RETRIES": "...",
        "MCP_WORKSPACE_PATH": "..."
      }
    }
  }
}

Fill in the environment variables with your own credentials.

• Runtime: Node.js 18+ (runs with npx).
• MCP client: Claude Code, Codex, Antigravity, Claude Desktop, Cursor or any other client that speaks MCP over stdio.
• Environment variables: SLACK_CONFIG_PATH, SLACK_TEAM_ID, SLACK_CLIENT_ID, SLACK_CLIENT_SECRET, SLACK_DISABLE_REFRESH, SLACK_REQUEST_TIMEOUT_MS, SLACK_MAX_RETRIES, MCP_WORKSPACE_PATH