building-chatgpt-apps
Apps SDK Development Guide
Overview
Create ChatGPT Apps with interactive widgets that render rich UI inside ChatGPT conversations. The Apps SDK combines MCP servers (providing tools) with embedded HTML widgets that communicate via the window.openai API.
Official Documentation: https://developers.openai.com/apps-sdk/ Examples Repository: https://github.com/openai/openai-apps-sdk-examples
Three-Layer Architecture
┌─────────────────────────────────────────────────────────────────┐
│ ChatGPT UI │
│ ┌─────────────────────────────────────────────────────────────┐│
│ │ Widget (iframe) ││
│ │ React/Vanilla JS + CSS ││
│ │ window.openai.* APIs for host communication ││
│ └─────────────────────────────────────────────────────────────┘│
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