Build a ChatGPT App with AI
Emmanuel Paraskakis
Founder, Level 250 | 3x VP, API Products
Publish an App to OpenAI's Appstore, for 900 million users.
1 month of Fractal Pro included.
Do you ever wish you were building apps when the iPhone App Store got started?
ChatGPT has 900 million weekly users. They can install apps. Yours could be one of them.
The opportunity is real but the path is unclear. The SDK docs have errors. The submission form is hostile. The review process is opaque. Hidden requirements that aren't in any documentation. Most people give up before they ship.
In this workshop, you'll build a ChatGPT app from scratch using Fractal, a no-code builder for MCP apps. You'll learn the Know / Do / Show framework for what makes a good app, set up developer mode to test locally, and walk through the full submission process including every undocumented gotcha.
You'll leave with a working ChatGPT app you tested in developer mode, a month of Fractal Pro to keep building, and a submission checklist covering every rejection reason.
There are about 600 apps in the directory today. This is the early iPhone App Store. The builders who show up now will have a head start when the ecosystem takes off.
Walk in with an idea. Walk out with an app ready for 900 million users.
What you’ll learn
Go from idea to submitted app
MCP tools and metadata act as instructions to ChatGPT
Good naming is essntial for your app to be surfaced to users
Learn what makes a good ChatGPT app
Understand what UI modes are available and what they are used for
Brainstorm good use cases for Chat apps
We'll give you the prompts and setup instructions
You'll know how to refine your app to get the desired results
You'll underatnd how to evaluate your app in developer mode and in MCPJam
What to know ahead of time so you can prepare for the complex submission process
Traps to avoid, especially with undocumented requirements
What to expect after submission and how to deal with a rejected app
Workshop agenda
Optional: Introductions
Join early to introduce yourself and meet participants before the workshop starts.
What MCP Apps Bring to AI
MCP Apps are UI for Chat. How ChatGPT Apps relate to MCP, why the 900M+ weekly user base matters, and what the directory looks like today. Live tour.
What Makes a Great ChatGPT App
The Know / Do / Show framework. Know: live data. Do: take actions. Show: better visualizations. Real examples from the directory. What OpenAI looks for.
UI Patterns You Can Use
Inline cards, carousels, fullscreen, picture-in-picture. When ChatGPT surfaces your app and when it doesn't. Golden prompts and tool naming as UX.
Build a Working ChatGPT App and Test It
Build a ChatGPT app from a prompt using Fractal. Define tools, set annotations, preview it. Then enable Developer Mode in ChatGPT and test it live.
What to Watch Out For So You Don't Get Rejected
Start small. Prompts and metadata ARE the UX. The pre-publishing checklist. Every technical, UX, and content reason apps get rejected.
The Submission Process - Harder Than It Should Be
The full 6-step form walkthrough. Undocumented requirements: icon specs, domain verification, demo video, privacy policy. Every gotcha exposed.
Optional: Q&A and Next Steps
Extended Q&A, rejection fixes, and the future of AI apps. Your ChatGPT apps will work in Claude too.
Learn directly from Emmanuel
Emmanuel Paraskakis
3x VP Product (Apiary, Swagger, Oracle) | 1.3M APIs | Agent-ready APIs & MCP
Who this workshop is for
Product Managers who want to ship a ChatGPT app for their product and navigate the submission process.
Founders and Makers who want to get into the ChatGPT directory early - about 390 apps today, like the iPhone Appstore in 2008, but for AI.
Engineers who want to prototype their first ChatGPT app with no-code tools and skip the undocumented gotchas.
Prerequisites
Having a paid ChatGPT subscription
This lets you use developer mode and will also let you submit an app to the OpenAI directory
A basic understanding of MCP would be a bonus, though not required
ChatGPT apps are based on MCP
An idea for an app to develop
Not required, we'll give you a template which you can then repurpose
What's included
Live sessions
Learn directly from Emmanuel Paraskakis in a real-time, interactive format.
Lifetime access
Go back to course content and recordings whenever you need to.
Community of peers
Stay accountable and share insights with like-minded professionals.
Certificate of completion
Share your new skills with your employer or on LinkedIn.
Maven Guarantee
Your purchase is backed by the Maven Guarantee.
Free resource
Build for ChatGPT's New App Store
Why you're early to the ChatGPT Apps opportunity
900M users, a growing directory, and almost nothing in it yet. We'll show you what's out there and what's missing.
What's a ChatGPT App and where to find one
Explore the OpenAI directory, Install an app, run it live and understand what experiences are possible.
What makes a good ChatGPT App
What are the best use cases. Which ones are bad. Not every product fits. Know if yours does.
How a ChatGPT App gets built with no code
Know what tools are available, including no-code and how to start building and validating good ideas.
Frequently asked questions
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