Rate Limits on Universal Login Prompts /u/*

Last Updated: Feb 20, 2026

Overview

This article explains why automated script are providing rate limit issues on /u/* endpoints.

Cause

The /u/* endpoints should not be explicitly called using automated scripting. These endpoints are used during an interactive flow and will be limited for security purposes.

Solution

Calling the /u/* endpoints explicitly is not supported. Begin interactive authorization flows from the /authorize endpoint.