Static feed search with markup

[ReedyBear]

It would be great to search for feeds by appending a URL to rsslookup.com. openrss.org has this feature.

Ex: rsslookup.com/https://www.npr.org/

Then the search result that is returned should provide feeds discovered on npr.org AND should provide the appropriate markup for them.

Said markup would be:

<link rel="alternate" type="application/rss+xml" title="Home Page Top Stories" href="https://feeds.npr.org/1002/rss.xml">
<link rel="alternate" type="application/rss+xml" title="NPR News" href="https://feeds.npr.org/1001/rss.xml">
<link rel="alternate" type="application/rss+xml" title="NPR Music" href="https://feeds.npr.org/1039/rss.xml">
<link rel="alternate" type="application/rss+xml" title="Morning Edition" href="https://feeds.npr.org/3/rss.xml">
<link rel="alternate" type="application/rss+xml" title="All Things Considered" href="https://feeds.npr.org/2/rss.xml">
<link rel="alternate" type="application/rss+xml" title="Wait Wait... Don't Tell Me!" href="https://feeds.npr.org/35/rss.xml">

This way if you paste a URL into a feed reader app and no feed is found, then rsslookup.com/ could be prepended to discover feeds. However, this proposed feature would only be useful if rsslookup.com provided smarter feed discover for websites that lack proper markup, as I suggested in this issue: #9

[mratmeyer]

just to confirm, we already have support for something like https://www.rsslookup.com/?url=https://www.npr.org/. getting rid of the ?url= may be worth considering though.

as for the markdown this is an interesting idea. right now i put the lookups behind Cloudflare Turnstile to prevent spam, maybe the risk is low though and if i add caching of some sort it could be mostly mitigated