Methods and systems are provided for regulating access to a database by a server. One exemplary method involves the server receiving one or more requests for an activity with respect to the database and determining an attempted usage for the activity over a monitoring period by a source of the requests. When the attempted usage exceeds an allowed usage of the activity for the monitoring period, the server provides a human verification test to the source and thereafter initiates the activity with respect to the database in response to receiving a satisfactory human verification response to the human verification test from the source.