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ChatGPT app builder
Describe the tool you want inside ChatGPT. Get a working Apps SDK project with its server and screen.
ChatGPT app builder is a free AI skill for the job "Connect AI to your tools". Give the instructions to an AI assistant that supports the required files and tools, then review its output.
Free · No account · Apache 2.0 licence · Made by OpenAI · Level: advanced · Thinking: high
Made by OpenAI. See the original on GitHub; we copied it as it is, with its licence.
What it does
A working starter project for a tool that runs inside ChatGPT, with its server and its on-screen panel. You describe what the app should do, and you get code that follows the current Apps SDK instead of guesses from old examples. It starts by reading the current official docs. Then it sorts your idea into a type of app, plans each tool with names, inputs and outputs, and picks an official example to adapt or a small fallback to start from. It writes the server, the panel and the setup steps for local testing. A final check compares the repo against a minimum working checklist. You need Node, plus access to the OpenAI docs through a tool or the web.
You give it
- What your app should do
- The data or service it connects to
- Whether it needs a visual panel
- Your hosting plan (optional)
You get
- An app type and repo layout
- A tool plan with inputs and outputs
- A server and panel scaffold
- Setup steps for local testing
- A validation report
Use it when
- You want your service to appear as an app inside ChatGPT.
- You are not sure which of the official examples to start from.
- You need a tool plan with clear names and inputs before coding.
- You want to test the app locally and then submit it.
How to use it
- Add it to your AI once: download it and add the folder to Claude, ChatGPT or Codex as a skill.
- Ask for the job in your own words. Your AI opens the skill when it fits.
- It works best when your AI can run code and open a browser.