01What Reverse Engineer Anything Is and How It Works

Reverse engineer anything is a free, open-source MCP (model context protocol) that lets any AI agent analyze and rebuild apps, websites, or tools from their front end. You give your agent a live webpage URL, and it studies the page’s HTML, CSS, JavaScript, and API calls to understand how everything works. Then it builds you a fully functional clone with the same logic and features.

The idea is simple: instead of guessing how an app works, you let the agent take it apart piece by piece. It reads the UI structure, finds event handlers and API endpoints, and reconstructs the behavior in your own workspace. Julian Goldie showed this by giving his Claude agent a link to his own booking calendar.

Within seconds, the agent rebuilt that calendar as a standalone app, complete with scheduling rules, time slots, and shareable links.

02Main Features of Reverse Engineer Anything

Reverse engineer anything comes with several powerful features that make it useful for developers and non-developers alike:

  • Works with any AI agent — Claude, Hermes, Muse, or any other tool that supports MCP protocols.
  • Supports multiple input types: websites, Android apps, Flutter apps, devices, and file formats.
  • Analyzes the front end without needing access to the back-end server or database.
  • Rebuilds the app with its own API, so you can run it independently.
  • Preserves branding and UI structure, though you can customize the design later.
  • Produces a shareable link for the rebuilt app, making it easy to test or share.
  • Allows you to adjust settings like meeting length, start grid, office hours, and bookable windows after rebuilding.

The process happens in six steps: understand the behavior, get the artifact, follow strings (naming conventions in code), decode the process, watch how settings work, then rebuild and verify.

03How to Set Up Reverse Engineer Anything

Getting started with reverse engineer anything is straightforward. Julian Goldie walked through the setup using Claude and his agentic operating system. Here are the steps:

  1. Go to the GitHub repo for reverse engineer anything. The project is open source and free. Copy the repository link.
  2. Open your AI agent — Julian used Claude inside his agentic operating system, but any MCP-compatible agent works.
  3. Provide the GitHub link to your agent. The agent will load the MCP and prepare to reverse engineer.
  4. Give a target URL of the app or website you want to clone. Julian used his own booking calendar funnel.
  5. Tell the agent what to do — for example, “Create a system like this one” or “Reverse engineer this page and build a clone.”
  6. Let the agent work. It will analyze the page, find the code, API, and logic, then build the app in your workspace.

No coding is required. The entire setup takes less than a minute, and the agent does all the heavy lifting.

04How to Use Reverse Engineer Anything: Step-by-Step Example

In this episode, Julian Goldie demonstrated using reverse engineer anything to clone his own booking calendar. Here is how it worked:

He gave Claude the URL of his booking funnel. The agent started by reverse engineering the landing page, pulling real findings from the page, and then building the clone. It analyzed the front end to figure out the scheduling rules: appointments per slot, slot duration, slot interval, and calendar type.

It even identified who was on the calendar from his sales team.

Next, the agent found the API endpoints by reading the code. Then it built an animated version of the calendar step by step. The result was plugged into Julian’s agentic operating system workspace.

The rebuilt app included:

  • Scheduling rules customizable to the user (name, meeting length, start grid).
  • Office hours and bookable window settings.
  • Seats per slot for group bookings.
  • A reset button to clear all bookings.
  • A shareable link that runs off the same API.
Testing the shareable link, Julian clicked a time slot, entered details, and confirmed the booking — the system showed who got the slot. The whole process took about 10 minutes from start to finish.

05Results and Tests Shown in This Episode

Julian Goldie tested reverse engineer anything live and got impressive results. The agent successfully cloned a fully functional booking calendar from a single URL in under 10 minutes. The clone included an API, custom scheduling rules, and a shareable public link that actually processed real bookings.

The project itself is growing rapidly. Julian noted 181,000 GitHub stars, comparing it to the early growth of OpenClaw or Hermes agent. The creator also reverse engineered Notion and built a working clone using this same MCP.

The tool works for websites, Android apps, Flutter apps, devices, and file formats — anything with visible code.

The rebuild proved that the front-end analysis is enough to capture all core functionality. Julian pointed out that the UI could be improved, but the logic and API were fully functional. No back-end access was needed.

The agent studied the behavior, found the strings (naming in code), decoded the process, and rebuilt it uniquely.

06Tips, Limits, and Mistakes to Avoid

Using reverse engineer anything is easy, but there are a few things to keep in mind. Julian Goldie shared these tips:

  • The UI won’t be perfect — the rebuild preserves the structure but may need design tweaks. Plan to customize the look afterward.
  • Make sure you have a clear target — give the agent a specific URL or app. Vague instructions lead to weaker results.
  • The tool only works on front-end code — if the app has heavy server-side logic that isn’t visible, the clone may miss some features.
  • Check the API endpoints — the agent finds them automatically, but you may need to verify they match your needs.
  • Use with any agent — Julian tested with Claude, but you can use Hermes, Muse, or anti-gravity agents. The MCP is agnostic.
  • Don’t expect instant perfection — Julian said the design could be improved, and the rebuild works best for learning and prototyping, not production use.

One mistake to avoid: giving the agent a link to a page that changes frequently or has dynamic content that requires authentication. The tool works best on stable, public interfaces.

07Who Reverse Engineer Anything Is For and Why It Matters

Reverse engineer anything is for anyone who wants to learn from existing apps and build their own versions quickly. Julian Goldie, who is not a technical person, used it successfully to clone a booking calendar. The tool matters because it makes app development accessible to non-coders.

It is ideal for:

  • Entrepreneurs who want to prototype ideas based on successful apps.
  • Developers who want to study how popular tools are built.
  • No-code builders who want to create custom solutions without writing code.
  • AI enthusiasts who want to train agents to understand software architecture.
The project is free and open source, with a huge community (181,000 stars). Julian compares its growth to major AI releases. By using this MCP, you can teach any AI agent to reverse engineer and rebuild, saving hours of manual analysis.

The ability to clone a working app from a single URL changes how fast you can iterate and learn.

08Integrating Reverse Engineer Anything with Other AI Agents

Reverse engineer anything works with any AI agent that supports MCP. Julian Goldie showed how he plugged it into Claude inside his agentic operating system, but he also mentioned Hermes and Muse. The key is that you can teach the skill to any agent.

To integrate: get the GitHub link for the MCP, provide it to your agent, and then give the target URL. The agent will handle the rest. Julian noted that you can view everything built inside your workspace, making it easy to test and iterate.

This opens up possibilities for using multiple agents to reverse engineer different parts of a complex system — for example, one agent analyzes the UI, another studies the API, and a third rebuilds the backend.

The MCP model means you don’t need to set up complex infrastructure. Just load the tool into your agent, point it at a URL, and let it work. The result is a custom app you can tweak and share.