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The type of authorization your application can use depends on the specific use case.

Learn how to create a Platform App

Depending on the authentication method you choose, you need to specify further details.
Authentication MethodDetails
OAuth 2.0Specify the client ID and client secret.
JWTAdd a public key or generate a public/private key pair. Choose the app access level.
Client Credentials GrantSpecify the client ID and client secret. Choose the app access level.
See for details.

Client-side

OAuth 2.0

OAuth 2.0 requires the application to redirect end-users to their browser to login to Box and authorize the application to take actions on their behalf.
Box OAuth 2.0 approval
When to use OAuth 2.0?Client-side authentication is the ideal authentication method for apps that:
  • work with users who have existing Box accounts
  • use Box for identity management, so users know they are using Box
  • store data within each user account vs. within an application’s Service Account

Learn about client-side authentication with OAuth 2.0

Server-side

JWT

Server-side authentication using JSON Web Tokens (JWT) does not require end-user interaction and, if granted the proper privileges, can be used to act on behalf of any user in an enterprise. Identity is validated using a JWT assertion and public/private keypair.
Box JWT flow
When to use JWT?Server-side authentication with JWT is the ideal authentication method for apps that:
  • work with users without Box accounts
  • use their own identity system
  • do not want users to know they are using Box
  • store data within the application’s Service Account and not a user’s account

Learn about server-side authentication with JWT

Client Credentials Grant

Server-side authentication using Client Credentials Grant does not require end-user interaction and, if granted the proper privileges, can be used to act on behalf of any user in an enterprise. Identity is validated using the application’s client ID and client secret.
When to use a Client Credentials Grant?Server-side authentication with Client Credentials Grant is the ideal authentication method for apps that:
  • work with users without Box accounts
  • use their own identity management system
  • do not want users to know they are using Box
  • store data within the application’s Service Account and not a user’s account

Learn about server-side authentication with Client Credentials Grant

Comparison

The following is a quick overview of the key difference between client-side and server-side authentication.
OAuth 2.0JWTClient Credentials
Requires user involvement?YesNoNo
Requires admin approval?NoYesYes
Can act on behalf of other users?YesYesYes
Do users see Box?YesNoNo
Can create App Users?NoYesYes
An Access Token is tied to a specific Box user and the way the token has been obtained determines who that user is.For example, when using client-side authentication the token represents the user who granted access to their account, while while when using server-side authentication the token defaults to the application’s Service Account.