I’m getting an error trying to use the subscribe API ? I’m getting

‘{“error”:{“code”:13,“message”:“Method not found”}}’.

I searched of the forum but didn’t find anything. It’s been a few months since I last used it. I can reproduce the issue on the demo server, including with a feed that validates and that I’m already subscribed to. (https://srv.tt-rss.org/tt-rss/public.php?op=subscribe&feed_url=http%3A%2F%2Fwww.rte.ie%2Frss%2Fnews.xml).

Well using the URL as shown in your post does yield that error when attempting to subscribe, but…

Instead try using this URL ==> News Headlines

If that’s what you’re looking for(?), subscribing works for me in my instance of tt-rss and on the demo server.
.

If you mean subscribe straight in the UI, yes that does work. The issue is when trying to use any of the browser extensions that can find hidden embedded feed URLs in pages. I’ve used this capability on and off for years, it has stopped working sometime since I last used it, maybe a couple of months ago.

the URL is slightly different now as this is provided by the bookmarklets plugin (you don’t need to have it enabled to use it), it’s something like ?op=bookmarklets--subscribe&the-rest-is-the-same

you can see the URL in the bookmarklets settings (prefs → feeds → plugins → bookmarklets → subscribe to feed, just click it)

I hit this today, and noticed the FAQ is outdated (which I initially found this API in): Tiny Tiny RSS – FAQ

sure, i’ll update the faq

Seems there is some wiki magic happening that corrects -- to . Maybe missing some backslash somewhere?

yeah, only on the static wiki. i think it’s fixed now.