Collect cards with a discount funded by token trading fees. Explore the marketplace and try the pack preview while Cardback is in devnet testing.
START HERE · DEVNET
Connect your wallet, add test tokens, and try a pack. Everything you need is here.
Connect the wallet you want to test with. Sign-in is free.
Reconnect to refresh your wallet permissions. Approve the connection and the free sign-in message.
Enable Solana devnet (testnet mode) in your wallet. Use the faucets below, then refresh your balances here.
Use USDC-Dev on Solana devnet. These tokens have no real value.
The treasury pays for test packs and covers your discount. Add test tokens once to get started.
Connect your wallet in step 1 to review a transfer.
Send 100 test USDC and 0.1 devnet SOL to this test treasury. Keep the rest in your wallet for checkout.
Loading address…Devnet only. The balances update automatically after confirmation.
To Cardback’s test treasury:
Only the missing amounts are added, plus a small devnet network fee. This funds the treasury; it does not purchase a pack.
Your wallet connection needs to be refreshed. Reconnect, then confirm this transfer again.
Your balances and the next action will appear here.
Checking test treasury…
Use a wallet and choose a machine.
Live checks when devnet is reachable.
This estimate uses a sample budget and does not reserve funds. A checkout order below confirms your eligibility, available discount, and payment amount.
Test tokens only · no real-money purchases
Checking checkout availability…
Create an order to see your exact discount. No payment yet.
Pay the amount shown using test USDC and devnet SOL for fees.
Wait for “Ready to open” in Your orders, then click Open pack.
Checking which packs are enabled for this test.
Your wallet will ask you to sign the payment. Keep devnet SOL available for network fees. If Cardback cannot deliver the gift, your payment is queued for a refund.
Reconnect your wallet, approve the connection and free sign-in message, then try your payment again.
THE INTENDED PAYMENT FLOW
Checkout is being tested on Solana devnet. The Cards page displays real marketplace listings; purchases there continue on Collector Crypt.