---
title: APIs
api_version: 2026-01
api_name: checkout-ui-extensions
source_url:
  html: https://shopify.dev/docs/api/checkout-ui-extensions/latest/apis
  md: https://shopify.dev/docs/api/checkout-ui-extensions/latest/apis.md
---

# APIs

[use​Api()](https://shopify.dev/docs/api/checkout-ui-extensions/latest/apis/useapi\(\))

[Returns the full API object that was passed in to your extension when it was created.](https://shopify.dev/docs/api/checkout-ui-extensions/latest/apis/useapi\(\))

[use​Extension​Api()](https://shopify.dev/docs/api/checkout-ui-extensions/latest/apis/useextensionapi\(\))

[Returns the full API object that was passed in to your extension when it was created.](https://shopify.dev/docs/api/checkout-ui-extensions/latest/apis/useextensionapi\(\))

[use​Subscription()](https://shopify.dev/docs/api/checkout-ui-extensions/latest/apis/usesubscription\(\))

[Subscribes to the special wrapper type that all "changeable" values in the checkout use.](https://shopify.dev/docs/api/checkout-ui-extensions/latest/apis/usesubscription\(\))