Cookies
A few small files that make signing in and drafts work. None of them track you, advertise to you, or come from anybody else.
Last updated 23 September 2026.
The short version
Every cookie here is needed for the site to work. There are no analytics, advertising or social-media cookies, and no scripts from other companies. That’s why we don’t ask you to accept cookies — there’s nothing optional to accept.
Cookies
- authjs.session-token
- Keeps you signed in. Lasts 90 days after you last use the site.
- mantle.pending
- Ties a sign-in link to the browser that asked for it, so nobody else can use it. Lasts 10 minutes.
- mantle.device
- Recognises a browser you've told us to trust, so signing in there is quicker. Lasts a year.
- signin-next
- Remembers where you were going while you sign in. Lasts 10 minutes.
- mantle-draft
- Lets a card you started without signing in find its way back to you. Lasts a year.
- mantle.seen
- Remembers cards opened in this browser, so they can be kept on a mantle if you make an account. Lasts a year.
On the secure site the sign-in cookie’s name starts with __Secure-. All of them are sent only to The Mantle, and none can be read by scripts on the page.
Stored in your browser
A few small notes are kept in your browser itself and never sent to us:
- mantle:opened:…
- Whether a card's envelope has already been opened here, so it isn't shown twice.
- mantle.send.copied.…
- Which card links you've already copied while sending.
- mantle-anon-notice-seen
- That you've seen the note about working without signing in.
Clearing them
You can clear them in your browser’s settings at any time. You’ll be signed out, and a card you started without signing in will no longer be reachable from that browser.