Payment, built into
the web itself.
x402 is an open standard that lets a website describe a payment using HTTP 402, "Payment Required." A compatible client can read the challenge, ask a wallet to authorize the stated amount and recipient, then retry the request after settlement.
Illustrative imagery; people shown are not LinkSell customers.
The open standards x402 is built on
The buyer's view
How a payment feels
You reach a paid page
You click "buy" — or an app you use does. Instead of a card form, the server replies with a small machine-readable note: "this costs $29 in USDC."
Your wallet signs
Your crypto wallet reads that note and asks you to approve one payment. You see the exact amount and the recipient before you confirm. Nothing is charged until you do.
The money moves directly
The USDC goes straight from your wallet to the merchant on the Base network. No processor sits in the middle holding it. The page unlocks the moment the payment settles.
Under the hood
The same payment, drawn as a diagram
Five roles and no LinkSell-held merchant balance. Settlement time depends on the live network and facilitator; LinkSell hosts the checkout step without sitting on the value line.
How a payment settles
Five roles; finality and external costs depend on the selected live network and facilitator.
New to crypto? Read this first
You need a compatible wallet and supported USDC.
USDC is designed to maintain parity with the US dollar and Circle describes it as redeemable 1:1 under its terms. That design is not a LinkSell guarantee: market price, issuer, wallet, facilitator, and network risks still exist. Read Circle's USDC information.
The wallet must support the live network and authorization requested by the checkout. Network, facilitator, wallet, and conversion costs can vary; x402 itself publishes zero protocol fees. Check the amount, recipient, network, and any displayed costs before signing.
The merchant's view
Why merchants choose it
Hosted, never custodial
LinkSell hosts x402 checkout so merchants don't have to.
We run the checkout UI, the dashboard, and the analytics — never the money. Want the technical detail: the 402 challenge envelope, the signed payment header, a sample client? That lives in the developer docs.