knary is a canary token server that notifies a Slack channel when incoming HTTP(S) or DNS requests match a given domain or any of its subdomains. It also supports functionality useful in offensive engagements including subdomain blacklisting. Redteamers use canaries to be notified when someone (or something) attempts to interact with a server they control. Canaries help provide visibility over processes that were previously unknown. They can help find areas to probe for RFI or SSRF vulnerabilities, disclose previously unknown servers, provide evidence of a MitM device, or just announce someone interacting with your server.