The platform built for gamers, by gamers.
Bringing the TCG community together under a single integrated platform with modern, automated, and user-directed solutions.
Your entire collection,
at your fingertips.
Stop juggling spreadsheets and binders. C4 gives you a living, breathing digital inventory of every card you own — organized, valued, and accessible from any device, any time.
Sort, filter, and manage your entire collection by set, rarity, or value.
Instantly look up any card to view all attributes
Monitor real-time market prices and portfolio value as your collection grows.
Curate your want-list and hit the trade market to find your next addition to the collection
Trade the cards you have
for the ones you need.
C4's peer-to-peer trading system makes swapping physical cards with friends and local players seamless, transparent, and fair.
List Your Cards
Select cards from your collection you're willing to trade and set your asking price or desired swap.
Propose a Trade
Browse friends' collections and propose direct swaps. Counter-offers are always welcome.
Confirm & Secure
Both parties confirm the trade. C4 logs the transaction so there's a clear record on both sides.
Meet or Ship
Arrange a local meetup or ship with confidence. Verified trade history builds your community reputation.
Trade Proposal
You Offer
C4 Ember Wyrm
Est. $42.00
They Offer
Dark Magician Girl
Est. $38.50