US Patent 9942214 Automated agent detection utilizing non-CAPTCHA methods

A computer-facilitated service receives a request, from a user client, to access a site provided by the service. The service may obtain, from the request, identifying information, which may be used to identify prior activity of the user client. This prior activity is used to determine whether the user client is to be provided with an interstitial user interface component, which may be configured to cause the user client to provide additional information about the client and to be successfully completable by an automated agent or other automated process. If an interstitial user interface component is provided, the service may receive, from the user client, this additional information, which may be used to determine whether the user client is using an automated agent to access the site.