---
title: UI API
description: The API for interacting with the extension’s UI.
api_version: 2026-04
api_name: checkout-ui-extensions
source_url:
  html: https://shopify.dev/docs/api/checkout-ui-extensions/latest/target-apis/platform-apis/ui-api
  md: https://shopify.dev/docs/api/checkout-ui-extensions/latest/target-apis/platform-apis/ui-api.md
---

UI API

Not supported in this version.