Privacy
What AO MCT keeps about you, and why. Last updated 9 October 2026.
Without an account
Every tool works without an account. What you set up (crafting cards, calculator settings, your profile levels) is saved in your own browser. A few settings that pages need as they load, like your server and calculator setups, travel with your requests as cookies, but we don't store them. Page views are counted with Vercel Web Analytics, which sets no cookies and doesn't identify you.
With an account
Signing in is optional and uses Discord. We only ask Discord for your identity, not your email address, and we don't keep Discord's access tokens. We store:
- your Discord user id, username and avatar link, refreshed each time you sign in;
- your account type (free, supporter and until when, or admin), and whether the account is banned and why;
- your sign-in sessions, each with the browser and IP address it started from, until it ends: 30 days after you last used it, or when you sign out;
- the tool data saved in your browser, so it follows you to other devices.
We use this to run your account and keep your data in sync (to provide the service you asked for), and to keep the site safe, such as blocking abuse (our legitimate interest). We never sell it or use it for advertising.
Cookies
Sign-in cookies keep you signed in and are strictly necessary. The other cookies and browser storage only hold the settings you choose. There are no tracking or advertising cookies, so there's no cookie banner.
Who handles it
The site runs on Vercel, accounts and synced data are stored with Aiven, and sign-in goes through Discord. Some of this may be processed in the United States, under those companies' data protection agreements.
Your choices
You can delete your account at any time on your Profile page: your account, sessions and synced data are removed at once. What's saved in your browser stays until you clear it. To ask for a copy of your data, a correction or anything else, reach us on Discord. You can also complain to your data protection authority.