MXToolbox (blacklist)
Triggers: !blacklist, !spamcheck
Try it
Kagi would openhttps://mxtoolbox.com/SuperTool.aspx?action=blacklist:example.com&run=toolpage
Run @blacklist in Kagi for Kagi's own results from mxtoolbox.com only
URL pattern: https://mxtoolbox.com/SuperTool.aspx?action=blacklist:query&run=toolpage
Searches mxtoolbox.com, filed under Domains.