Hold cards, or mint them on Base
Cards are held for your users by default. When someone wants the NFT, mint it to their wallet on Base; it can still be bought back later.
Packflip Partner API
Real collectible cards, sold inside your product.
Sell Packflip packs through one REST API. You prepay in USDC; Packflip handles inventory, buyback, and shipping.
The whole life of a card, behind one API key.
Every operation is scoped to your organization and settled against your prepaid balance.
Buyback
Cards your users pass on are credited back to your balance.
Redemption and shipping
Redeem a card for the physical original and follow its shipment through the API.
Signed webhooks for every change
Balance top-ups, operations, and shipments arrive as signed events, retried with backoff and replayable from the API.
balance.topup.confirmedFrom deposit to doorstep.
Fund
Send USDC on Base to your account's dedicated address. It is credited once the transfer is final on-chain.
Order
Draw cards with an Idempotency-Key, revealed at once or sealed and refundable until opened. Retries never charge twice.
Deliver
Packflip holds the cards for your users. Mint any card as an NFT to a user's wallet whenever they want it.
Settle
Buy back cards your users do not keep, or redeem them and track the physical shipment.
One request per pack.
Plain JSON over HTTPS, decimal strings for money, and a published OpenAPI 3.1 contract.
curl https://partner.packflip.xyz/api/v2/operations \
-H "Authorization: Bearer $PACKFLIP_API_KEY" \
-H "Idempotency-Key: order-7f3c2a" \
-H "Content-Type: application/json" \
-d '{
"kind": "order",
"mode": "offchain",
"customerId": "cus_4h8mzq2vtr",
"vendingMachineId": 12,
"quantity": 1
}'Build it end to end in the sandbox.
The sandbox runs the same API with test funds, so you can fund, order, and settle before touching real inventory.
- Network
- Base Sepolia with test USDC
- Catalog
- A synthetic pack catalog, in a database separate from production
- Login
- The same console account and organization
- Test credit
- Add test balance from the console, no testnet USDC needed