Add 404-detecting bot for internal links?
74047
SO should notify users of broken links in their posts
69592
Problem with clickable archive.org URLs
98354
Adding magic link for Meta Stack Overflow?
16288
How to 'linkify' plain text URLs (locally) on the Mac?
21615
Allow [tag:tag-name] syntax to link to any site
132544
Catch 404 after changing permalink structure from /%postname%/ to /%category%/%postname%/
124046
Why won't my PHP app send a 404 error?
13679
301 redirect instead of 404 when URL is a prefix of a post or page name?
152331
How to get user friendly URLs without any file extensions?
114362
Using url package without hyperref makes link hit boxes erratic
152077
How to code an automated bot that can browse and do operations on a webpage
102499
Adding meta values to permalink
127718
Methods to ban bots, force attacks on my server
3303
SEO (or other) problems with a 404?
69406
Check if file exists but prevent 404 error in console from showing up
15749
Search question and answer Hyperlinks for a hostname?
102324
Provide a link to per-site Meta