People keep copies of posts they bookmark on X in bookmarx, so they can search them later. If you wrote a post and don't want it kept here, you can take every copy out of every library at once, and bookmarx won't save your posts again.
First, sign in with X to show the posts are yours. bookmarx only reads your name and handle. It doesn't create an account, see your bookmarks, or keep any access to your X account.
Sign in with XThis covers posts you wrote. A post of yours that someone else quoted stays in their post. To ask about that, or if you can't sign in to X, see the privacy page.