Buy & sell anything with bitcoin
The open-source marketplace where you own your data, your contacts, and your transactions. Fees under $0.01.
Balance
1,247,500
sats
Your Items
Vintage Keyboard
500,000 sats
Headphones
800,000 sats
Book Set
100,000 sats
Own your data
Your items, contacts, and transactions belong to you.
Instant payments
BSV transactions confirm in seconds for under $0.01.
Open source
Run locally, self-host, or use Qart.app. Your choice.
How to use Qart
Self-hosted
Run locally
On your machine. Peer-to-peer. Your data stays with you.
Host it yourself
Deploy to your own infrastructure. Full control, your domain, your rules.
Mobile
Qart Wallet
Self-custodial wallet app. Keys stay on your device. Scan, pay, and sign in with Bitcoin.
Hosted
Qart.app
Managed hosting with paid services. Start here, self-host later. You always own your data.
Items
People have items. Organizing them can be good. Sometimes items are for sharing.
Inventory
Tokenize items to rent, borrow, or buy.
Buy & Sell
Trade digital or physical items with bitcoin.
Borrow & Give
Find a good home for your items.
Sample Item
Your personal inventory
FOR SALE