MXToolbox (dns ptr)
Trigger: !rdns
Try it
Kagi would openhttps://mxtoolbox.com/SuperTool.aspx?action=ptr:hello+world&run=toolpage
Run @rdns in Kagi for Kagi's own results from mxtoolbox.com only
URL pattern: https://mxtoolbox.com/SuperTool.aspx?action=ptr:query&run=toolpage
Searches mxtoolbox.com, filed under Tools.