Build your first ChatGPT App (No Code)

Fractal just launched on Product Hunt!! Here's a practical guide to building your first MCP App.

Author

Elliot Garreffa
March 21, 2026

Hey builders,

Fractal just launched on Product Hunt today.

We've been partnering with the Fractal team at Ghost Team since the early days - and honestly, it's one of the best tools we've seen for getting an MCP app live fast.

So to mark the launch, I wanted to put together something practical: a guide on why MCP apps matter right now, and how you can build your first one - even if you've never written a line of code.

Fractal is a great tool to help you do exactly that and they even have a discount code (FRAC20) for their Product Hunt launch! But first, the context.

Also, be sure to show them some love on their Product Hunt today! It’s live now.

How to make your brand visible in the AI era

AI is becoming the default interface of the internet. 900M+ people now open ChatGPT before they open Google.

But most brands are completely invisible inside it.

Being mentioned in an AI response isn't enough. You need your product present at the moment of intent — branded, interactive, inside the conversation.

That's what MCP apps do. And here's the key part - build one app, and it works across ChatGPT, Claude, Copilot, Cursor, and every other major AI platform. One app. Every platform.

How to build your first MCP app

I put together a full step-by-step guide:

Here's how the process works:

1. Start with a clear use case

Don't start with "I want to build an app." Start with a specific problem. A travel budget calculator. A lead qualifier. A product recommendation engine. The more specific you are, the better Fractal can build around it.

2. Write one prompt

Describe your app in plain language. "I want to build a travel budget calculator. Someone enters their destination, dates, travel style, and group size. It returns a realistic budget breakdown." No technical specs. No wireframes. Just clarity.

3. Fractal maps the intent

This is where it gets interesting. Fractal generates specific use cases — the exact prompts people will type into ChatGPT to trigger your app. It maps your app around real user intent, not just features. You review the use cases and approve them.

4. Tools get built automatically

Fractal turns those use cases into tools. Each tool handles a specific intent — so when someone types "what's my budget for Tokyo?", the right tool fires. It also generates a design preview so you can see the UI before it goes live.

5. Test and iterate

Your app is live in about a minute. You can test it on desktop, tablet, and mobile. Want to change the design? Just prompt it — screenshot a UI you like and paste it in. Want better results? Tell Fractal to use ChatGPT's search capabilities for more accurate, real-time data. Go back and forth until you're happy.

6. Deploy everywhere

One click to deploy. Fractal gives you an MCP server URL — paste it into ChatGPT and your app is live. And because it's built on the MCP standard, the same app works across Claude, Copilot, Cursor, and any other platform that supports it. Build once, show up everywhere.

🎁 Exclusive Product Hunt Offer

For the Product Hunt launch, Fractal is offering 20% off with code FRAC20.

→ Get started at usefractal.dev (use code FRAC20 at checkout)

Not sure what to build?

Not sure what app to create? Check the MCP App Tracker at track.appdiscoverability.com - it tracks every app in the ChatGPT and Claude ecosystem.

Browse what's already live, spot gaps in the market, and find opportunities where demand exists but supply doesn't. It's one of the best places to get ideas for what to build next.

Getting discovered

Building the app is step one. Getting it found is step two.

See more on how discoverability works for MCP Apps here in a talk given by Elliot Garreffa at MCP Connect in Paris.

Resources to get you started

→ How to Design World-Class ChatGPT Apps - design best practices

P.S. If you build something with Fractal, reply and tell me what you made - I’d love to hear!

Happy building,

Elliot

If you want help building your MCP app or figuring out your cross-platform distribution strategy, book a strategy call with our team at Ghost Team.
We've been in this space since day one.