How is Discovered Devices calculated on Discovery HomeSummaryThis KB explains how Discovered Devices is calculated on Discovery Home, as showing in the screenshot below: When clicking on Discovery > Home, the page is sending a request to REST API: /api/now/discovery_result/homepage > the REST API can be checked via: System Web Services > Scripted Web Services > Scripted REST APIs > Discovery Result > Get Homepage Stats > can be tested via REST API Explorer The API is doing below: var manager = new DiscoveryResultManager();var stats = manager.getHomepageStats(); From the script include DiscoveryResultManager, we can confirm below is how "Discovered Devices" is calculated: _getNumDiscoveredDevices: function() { var hardwareGr = new GlideRecord('cmdb_ci_hardware'); hardwareGr.addQuery('last_discovered', '>=', gs.daysAgo(30)); var srcQry = hardwareGr.addQuery('discovery_source', 'ServiceNow'); srcQry.addOrCondition('discovery_source', 'CredentiallessDiscovery'); hardwareGr.query(); return hardwareGr.getRowCount(); }, Please note, after clicking on the "Discovered Devices" box, a detailed report with CI classes is showing. This report is not generated via REST API, but is an actual report. It can be checked via: Reports > Administration > All > Discovered CIs