Passing Custom Parameters From Universal Login to Auth0 Actions
Jan 5, 2026
Overview
In some authentication flows, capturing additional user-provided data within the Universal Login (UL) experience is necessary. This article explains how to make this information available to Auth0 Actions. This capability is useful for passing context-specific values such as marketing tags, UI-captured preferences, referral information, or other custom parameters.
Applies To
- Passing custom parameters through Universal Login
- Universal Login
- Custom Prompts
Solution
Use custom prompts to send additional data captured in the Login or Signup screens to the server. This data appears in the PreUserReg or PostLogin actions, depending on the screen. For implementation details, configuration steps, and current limitations of custom prompts, refer to the Auth0 documentation, Customize Signup and Login Prompts.
