LockIn MCP - Let AI block distractions for you when you need to lock in

What it does

LockIn MCP is a system-level distraction blocker that integrates with AI tools via the Model Context Protocol (MCP). Instead of relying on a bypassable browser extension, LockIn edits your computer's hosts file to block distracting websites like YouTube, Reddit, and X (Twitter) at the system level. You can ask your AI assistant—whether it's ChatGPT, Claude, Perplexity, Gemini, or Poke—to block sites, start focus sessions, or temporarily unblock sites with accountability. The tool also includes a Chrome extension that checks each page against your active focus task, allowing work sites through while blocking others.

Who it is for

LockIn MCP is designed for knowledge workers, developers, students, and anyone who uses AI tools and struggles with digital distractions. It's particularly suited for users who want a more robust, cheat-proof focus solution than traditional browser extensions. The product targets individuals who already rely on AI assistants for their workflow and want to leverage those same tools to enforce focus.

Why it matters

Traditional distraction blockers are often easy to bypass—you can simply open a new browser tab or disable the extension. LockIn MCP addresses this by blocking at the system level via the hosts file, making it much harder to circumvent. By integrating with AI assistants, it also adds a layer of accountability: you can ask your AI to block distractions, and the AI can enforce the block natively. This approach fits naturally into the user's existing workflow rather than requiring them to adopt a separate tool.

Launch signal

LockIn MCP was launched by Mil Hoornaert. The website is live at lockinmcp.com, and the product is available for a free trial (3 days on the yearly plan) or a lifetime license for $29.99. The tool supports multiple AI platforms including ChatGPT, Claude, Perplexity, Gemini, Mistral, DeepSeek, Grok, Kimi, Copilot, Cursor, and Poke. Installation is done via a single command: npx -y lockin-mcp install.

Brand and naming

The name "LockIn MCP" combines two key concepts: "Lock In" as in entering a focused state, and "MCP" (Model Context Protocol), the standard it uses to connect with AI tools. The branding emphasizes turning AI assistants into productivity coaches. The tagline "Let AI block distractions for you when you need to lock in" clearly communicates the value proposition. The visual identity uses a clean, modern design with a focus on simplicity and integration with popular AI icons.