> ## Documentation Index > Fetch the complete documentation index at: https://developer.box.com/llms.txt > Use this file to discover all available pages before exploring further. # Platform App export const SignupCTA = ({children}) => { return
{children}
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; }; export const MultiRelatedLinks = ({sections = []}) => { if (!sections || sections.length === 0) { return null; } return
{sections.map((section, index) => )}
; }; export const RelatedLinks = ({title, items = []}) => { const getBadgeClass = badge => { if (!badge) return "badge-default"; const badgeType = badge.toLowerCase().replace(/\s+/g, "-"); return `badge-${badge === "ガイド" ? "guide" : badgeType}`; }; if (!items || items.length === 0) { return null; } return
{}

{title}

{}
{items.map((item, index) => {} {item.badge} {} {item.label} )}
; }; export const Link = ({href, children, className, ...props}) => { const localizedHref = href; return {children} ; }; Platform App typically presents Box functionality to a user through a custom interface. Box offers pre-built, customizable user interface components, known as UI Elements, for functionalities like browsing, searching, and previewing content. ## Authentication methods Platform Apps support OAuth 2.0, JWT, and Client Credentials Grant authentication methods. ## When to use Use a Platform App when you want to: * Use OAuth 2.0, JWT or Client Credentials Grant for authentication. * Upload and download files * Access both your own files and files owned by managed or external users. * List the application in the Box Integrations * Provide integration into the Box Web App ## Use cases Example use cases include: * A file vault in an application that allows an end user to access files that have been shared with them, while also providing access for employees to the same files through the Box Web app. An example of this is financial advisor sharing statements and investment prospectuses with investors that can be viewed and commented on within a platform application. * A file upload feature in an application that allows an end user to submit and upload files from within a custom-built application to Box. These uploads then initiate a business process with the Box Web app. An example of this is a candidate submitting a PDF of a resume to a recruiting portal then can then be routed to an appropriate employee for review. A free developer account gives you access to the Developer Console, where you can create Platform Apps using your preferred authentication method. ## Approval Platform Apps may require approval before use.