Contact
Have questions, suggestions or found a bug? Get in touch.
Email
kontakt@cardium.pl
We typically respond within 24-48 hours
Discord
Community server
Fastest response - join our community
Frequently asked questions
Where do card prices come from?
We fetch prices from eBay Finding API. These are current secondary market prices, updated regularly.
Is Cardium free?
Yes - core features (collection tracker, prices, wishlist, public profile) are completely free.
Is my collection data safe?
Yes. Data is stored in encrypted PostgreSQL (Neon). We never sell user data.
How do I add a card not in the catalog?
Email us - we'll add the missing set or card as soon as possible.
I found a bug - how do I report it?
Email contact@cardium.pl or report on Discord. Detailed descriptions and screenshots help!