Evernote provides searching for the url note meta field, which is named “sourceurl”. E.g.:
“sourceurl:https://my-fancy-page.com/sub”
It would be great to ease up migration from Evernote by also adding this feature to the proposed GSoC search syntax. In Joplin, the note URL can be found under “Note properties” (info icon) -> URL, but it cannot be used in a search query.