SMRTR ProgrammingOct 15, 2025Daily.dev

How to use the ChatGPT Apps SDK to build a pizza app

SMRTR summary

OpenAI launched ChatGPT Apps powered by the Apps SDK and Model Context Protocol, allowing developers to create interactive plugins that render custom UI widgets directly inside ChatGPT conversations. This tutorial demonstrates building a pizza app that displays maps, carousels, and videos through a local server connected via ngrok. The step-by-step guide covers setting up the development environment, creating widgets with HTML markup, and enabling Developer Mode in ChatGPT to test the app with natural language commands.

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