1. Add Cloudkit as plug-in to the gatsby-config.js: module.exports = { siteMetadata: { title: `your domain`,siteUrl: `https://www.yourdomain.tld`,}, plugins: [ {resolve: ‘gatsby-plugin-load-script’, options: {src: ‘https://cdn.apple-cloudkit.com/ck/2/cloudkit.js' },},],} 2. Configure the Cloudkit connector: window.CloudKit.configure({ containers: [{ containerIdentifier: ‘your cloudkit container path’,