The Auth0 Rapid Dynamic Client Creation rule is designed to detect unusual spikes in the registration of dynamic clients within the Auth0 environment. A dynamic client is created without prior knowledge of the server, which could be exploited for malicious purposes. This rule monitors for instances where the number of dynamically created clients exceeds a certain threshold—in this case, 15 within a 60-minute period. Such spikes may indicate attempts to misuse the dynamic registration feature to gain unauthorized access or execute malicious scripts. The rule's high severity indicates the potential critical security implications associated with such activities. It references the MITRE ATT&CK framework layer TA0003:T1136, which relates to account creation and maintenance. The rule is enabled and actively collects data from Auth0 events, analyzing the incoming logs for patterns of excessive client registration activities. The expected results are defined in the testing section, demonstrating both valid and invalid conditions to ensure reliability of the threat detection mechanism. Its effectiveness is crucial for maintaining the security posture of applications using Auth0 for identity management, especially considering the rise of automated attacks and abuse of identity systems.