# Shopify Checkout UI Extensions API

**Canonical:** https://apis.io/apis/shopify/checkout-ui-extensions-api/  
**Provider:** Shopify — https://apis.io/providers/shopify/  
**Documentation:** https://shopify.dev/docs/api/checkout-ui-extensions

Shopify Checkout UI Extensions API is one of 213 APIs that [Shopify](https://apis.io/providers/shopify/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Checkout, Commerce, and Extensions. The published artifact set on APIs.io includes API documentation.

Checkout UI extensions let app developers build custom functionality that merchants can install at defined points in the checkout flow, including product information, shipping, payment, order summary, and Shop Pay steps. Extensions for information, shipping, and payment steps are available to Shopify Plus stores.

## Machine-readable artifacts (1)

- **Documentation** — https://shopify.dev/docs/api/checkout-ui-extensions

## Other Shopify APIs (12)

- [Shopify GraphQL Admin API](https://apis.io/apis/shopify/graphql-admin-api/)
- [Shopify Storefront API](https://apis.io/apis/shopify/storefront-api/)
- [Shopify Customer Account API](https://apis.io/apis/shopify/customer-account-api/)
- [Shopify Partner API](https://apis.io/apis/shopify/partner-api/)
- [Shopify Payments Apps API](https://apis.io/apis/shopify/payments-apps-api/)
- [Shopify Liquid API](https://apis.io/apis/shopify/liquid-api/)
- [Shopify Functions API](https://apis.io/apis/shopify/functions-api/)
- [Shopify Discount Function API](https://apis.io/apis/shopify/discount-function-api/)
- [Shopify Webhooks API](https://apis.io/apis/shopify/webhooks-api/)
- [Shopify App Bridge](https://apis.io/apis/shopify/app-bridge/)
- [Shopify App Home API](https://apis.io/apis/shopify/app-home-api/)
- [Shopify Multipass API](https://apis.io/apis/shopify/multipass-api/)

## Tags

Checkout, Commerce, Extensions

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/shopify/checkout-ui-extensions-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/shopify/.