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OpenAI Apps SDK
by OpenAI
The Apps SDK lets developers design both the logic and the interface of an app that runs inside ChatGPT. It's built on the Model Context Protocol: you stand up an MCP server that exposes your app's capabilities and a custom UI (maps, playlists, forms, and more) that renders inside the conversation. Approved apps can be submitted for review and listed in ChatGPT's in-product app directory.
Works with
Custom GPTs, Actions, MCP connectors, and Apps.
When to use it
- You want a rich, interactive experience inside ChatGPT, not just a tool call
- You're a product team reaching ChatGPT users where they already are
- You need custom UI (maps, tables, media) blended with conversation
When not to
- A simple data fetch — a GPT Action or plain MCP tool is lighter weight
- Purely internal automation with no UI — Developer Mode MCP apps may suffice
What it does
- Define app logic and a custom in-chat UI, not just text tools
- Build on MCP with the official Python or Node SDK, exposing a /mcp endpoint
- Connect to your own backend so existing customers can log in or unlock premium features
- Submit for review and distribution in the ChatGPT app directory
How to install
Setup steps with copy-paste config. Sources are cited under each method.
Scaffold an MCP server with the Apps SDK
ChatGPTRequires: Node.js or Python · The official MCP SDK · A place to host the /mcp endpoint
Install the MCP SDK
Use the official Node or Python MCP SDK to build the server that backs your app.
shellnpm install @modelcontextprotocol/sdkExpose a /mcp endpoint and define tools + UI
Implement the tools your app offers and the components that render inside ChatGPT, following the Apps SDK build guides.
Connect it in ChatGPT and test
Register your server via Developer Mode, then iterate on the in-chat experience.
Submit for review
When ready, submit the app for review to be listed in the ChatGPT app directory.
- Apps SDK quickstart — documentation · OpenAI · Documentation · accessed 2026-07-24
- Introducing apps in ChatGPT and the Apps SDK — documentation · OpenAI · Documentation · accessed 2026-07-24
How to prompt it
Copy-paste prompts written to exercise this plugin, with what to expect.
Invoke your app in a chat
You've published a playlist-builder app.
Use the playlist app to build me a 60-minute focus playlist of instrumental tracks, and show it inline.
What to expect: ChatGPT calls your app's tools and renders your custom playlist UI inline, letting the user interact with it without leaving the conversation.
- Design your UI components to degrade gracefully when the conversation is text-only.
Tips for getting the most out of it
- Start from the openai/openai-apps-sdk-examples repo to see working end-to-end apps.
- Because it's built on MCP, your server's core tools can also be reused by other MCP hosts.
- Plan your auth early — connecting your backend lets existing users log in and unlock paid features.
Prompts to pair with it
Real prompts from the IterPrompt library you can copy or run.
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Frequently asked questions
What is the Apps SDK built on?+
The Model Context Protocol (MCP). Your app is an MCP server that exposes tools plus a custom UI that renders inside ChatGPT.
How do users find my app?+
After review and approval, apps appear in ChatGPT's in-product app directory, discoverable from the tools menu or chatgpt.com/apps.
Pairs well with
Related guides
Alternatives to OpenAI Apps SDK
Sources & verification
The facts on this page and where they come from. Anything unverified is labeled — we'd rather say "unknown" than guess.
- Apps SDK — official page · OpenAI · Documentation · accessed 2026-07-24
Install steps, pricing, and availability change often. Always confirm on the official page before relying on setup details.