IntegrateAPIAdditional FeaturesExpress CheckoutAdvanced GuidesUX GuidelinesOn this pageUX Guidelines For detailed UX guidelines, please refer to the Express Checkout UX Guidelines UI Kit To help you build consistent and compliant Express Checkout interfaces, Purse provides an official UI component library: NPM Package Package: @purse-eu/oc-ui-kit Registry: npmjs.com/package/@purse-eu/oc-ui-kit Installation npm install @purse-eu/oc-ui-kit or with Yarn: yarn add @purse-eu/oc-ui-kit The @purse-eu/oc-ui-kit library provides pre-built UI components that follow the Express Checkout UX guidelines, ensuring your integration meets the required design standards out of the box.