Check — command validation MCP server and PreToolUse hook

[golproductions]

Resource name: Check
URL: https://github.com/golproductions/check-mcp
npm: @golproductions/check-mcp (MCP server) · @golproductions/check-firewall (Claude Code hook)
Category: MCP Server / Hook
Website: https://www.golproductions.com/check.html

Instead of tweaking your prompts to make an AI agent better, just use Check. Instantly saves compute cost on failed retries.

Validates every command before execution — runnable or invalid, sub-100ms.

Claude Code (PreToolUse hook):

{
  hooks: {
    PreToolUse: [{
      matcher: Bash|PowerShell,
      hooks: [{
        type: command,
        command: npx,
        args: [@golproductions/check-firewall]
      }]
    }]
  },
  env: { GOL_CLIENT_ID: your_key }
}

Cursor / Windsurf (MCP server):

{
  mcpServers: {
    Check: {
      command: npx,
      args: [@golproductions/check-mcp],
      env: { GOL_CLIENT_ID: your_key }
    }
  }
}