# CloudKit JS Provide access from your web app to your CloudKit app’s containers and databases. ## Overview Use CloudKit JS to build a web interface that lets users access the same public and private databases as your CloudKit app running on iOS or macOS. You must have an existing CloudKit app and enable web services to use CloudKit JS. ### Before You Begin Set up your app’s containers and configure CloudKit JS. 1. Create your app’s containers and schema. If you’re new to CloudKit, start by reading [CloudKit Quick Start](https://developer.apple.com/library/archive/documentation/DataManagement/Conceptual/CloudKitQuickStart/Introduction/Introduction.html#//apple_ref/doc/uid/TP40014987). You’ll use Xcode to create your app’s containers and use CloudKit Dashboard to view the containers. Then create an iOS or Mac app that uses CloudKit to store your app’s data. 2. In CloudKit Dashboard, enable web services by creating either an API token or server-to-server key. Use an API Token from a website or an embedded web view in a native app, or when you need to authenticate the user. To create an API token, read . Use a server-to-server key to access the public database from a server process or script as an administrator. To create a server-to-server key, read [Accessing CloudKit Using a Server-to-Server Key](https://developer.apple.com/library/archive/documentation/DataManagement/Conceptual/CloudKitWebServicesReference/SettingUpWebServices.html#//apple_ref/doc/uid/TP40015240-CH24-SW6) in [CloudKit Web Services Reference](https://developer.apple.com/library/archive/documentation/DataManagement/Conceptual/CloudKitWebServicesReference/index.html#//apple_ref/doc/uid/TP40015240). See [CloudKit Catalog: An Introduction to CloudKit (Cocoa and JavaScript) ](https://developer.apple.com/library/archive/samplecode/CloudAtlas/Introduction/Intro.html#//apple_ref/doc/uid/TP40014599) for a JavaScript sample that uses a server-to-server key. 3. Embed CloudKit JS in your webpage. Embed CloudKit JS in your webpage using the `script` tag and link to Apple’s hosted version of CloudKit JS at `https://cdn.apple-CloudKit.com/ck/2/CloudKit.js`. ```javascript