Public
What anyone may read without signing in: the recipe and photos behind a public link, the cover a link preview shows, and the unsubscribe link a mail carries.
Read the recipe behind a public link
No session needed. A link that is unknown, revoked, paused, limited by the maximum lifetime or expired answers 404 alike.
Read what an unsubscribe link reaches
No session needed; changes nothing. A forged or expired link, or one naming an account or kind that is gone, answers 410.
Unsubscribe with a mailed link, or undo it
No session needed. Takes the link's u, k and s. Answers 410 like get-unsubscribe.
Unsubscribe from one kind of mail in one click (RFC 8058)
The address of a mail's List-Unsubscribe header. No session needed. The body, List-Unsubscribe=One-Click as urlencoded or multipart form data, is not read: the signed address alone decides. Switches off the mail of the link's kind only and answers 200 with no body, or 410 like get-unsubscribe.
Read the cover a link preview shows
No session needed: the crawler building a link preview has none. Answers the thumb of the recipe's cover while link previews are on and the token from create-share-link is valid. A photo that is not the cover, an invalid token and a recipe that does not exist answer 404 alike.
Read a photo of the recipe behind a public link
No session needed, like get-public-recipe. A photo of another recipe, one removed from the recipe, an unknown size and a link that serves nothing answer 404 alike.