@Halfjack mentioned pingback and I realised that Brock had contributed a Pingback Server Extension to Oddmuse back in 2004. I decided to take another look because I’m unhappy with how the Automatic Link Back currently works: it looks at referrer headings and thus it adds link for all the visitors coming to my site via blog rolls, web crawlers, etc.
Pingback would at least indicate the intention of letting me know about a link. I appreciate that, even if I’m 15 years late to the party. Hah!
Work in progress: pingback-server.pl