Apps SDK interfaces

OpenAI Apps SDK interface development

We design the interface as part of the AI product, not as decoration added after the tools work.

What it means

The OpenAI Apps SDK lets a ChatGPT app render an interactive web interface connected to MCP tool input and results. It is useful when users need to compare, configure, review or act on structured information that would be difficult to understand as text alone.

What we deliver

Conversation-aware interface architecture
Responsive and accessible widget states
Clear loading, empty, error and success behaviour
Secure communication between ChatGPT, the widget and MCP tools

How we work

Model the task

We determine which information belongs in conversation and which belongs in the interface.

Prototype states

We test the key interaction before investing in full implementation.

Build the widget

We implement a fast, responsive interface using the Apps SDK host contract.

Test in context

We validate the widget inside real conversations, including streaming and tool failures.

Frequently asked questions

When is a widget better than text?+

When users must inspect structured data, edit assumptions, compare alternatives or confirm an action.

Can an Apps SDK widget be interactive?+

Yes. It can react to tool input and results and invoke approved server tools through the host.

Does the widget work outside ChatGPT?+

It can be engineered with reusable UI logic, but the Apps SDK integration specifically targets the ChatGPT host environment.