This article addresses the 200-character limit when defining scopes directly in an Auth0 Enterprise Connection's settings. While this limit is enforced on the Auth0 server-side configuration, a tested workaround allows for passing a comprehensive set of scopes during the authentication flow via client-side parameters. Furthermore, it clarifies that in common scenarios such as account linking, specific Identity Provider (IdP) scopes are often not required, and the primary purpose of scopes is to access external IdP APIs.

• Auth0 Enterprise Connections
• Upstream IDP
• Account Linking

When configuring scopes within an Auth0 Enterprise Connection's settings (specifically the options.scope field), there is a backend-enforced character limit of 200 characters. Attempts to save a scope string exceeding this length will result in an error: options.scope length must be less than or equal to 200 characters long.

This limitation pertains to the static configuration within the Auth0 dashboard for the connection itself.

Auth0 Enterprise Connections utilize scopes primarily to enable the application to obtain access tokens from an external Identity Provider, such as Google. These access tokens, granted by the IdP, then allow the application to call external IdP APIs (for example, Google Calendar, Gmail) on behalf of the user, with the granted permissions becoming available within the user's identities array in Auth0.  

The scopes defined directly in the Auth0 Enterprise Connection settings serve as a convenience, automatically appending them to authorization requests if the application does not explicitly specify a scope parameter. However, a backend-enforced 200-character limit applies to these statically configured scopes.

To bypass this character limit when a comprehensive set of scopes is required for external API access, the recommended approach is to pass the desired scopes directly from the client application during the authorization request. This is done by including the full scope list in the connection_scope parameter of the authorization URL. For detailed implementation of client-side scope passing, refer to the Auth0 documentation: Adding Scopes for an External IdP.