Pay

Pay with Unichain (ETH)

Pay any U.CASH merchant with Unichain. Your ETH settles final and direct from your wallet, with low fees and no chargebacks.

Why pay with Unichain

Crypto payments are final, global, and cheap. Unichain is a strong way to pay merchants directly.

No chargebacks

ETH payments are final on-chain. No card-style disputes clawing funds back weeks later.

Borderless

Pay any U.CASH merchant worldwide. No blocked regions, no currency conversion holds.

Low fees

Network fees instead of card processing percentages, especially on efficient chains.

Private by default

No card number to hand over. You sign a transaction from your own wallet.

Pay by name

Send to a web3 name (ENS, Unstoppable Domains, FIO) instead of a long address.

Fast settlement

Merchants see your payment confirm quickly, then release goods or services.

How to pay with Unichain

Step 01

Find a checkout

Open a Pay-Now link, an invoice, or any U.CASH merchant checkout that accepts Unichain.

Step 02

Choose ${c.name}

Select ETH as your payment method from the supported coins.

Step 03

Pay from your wallet

Send ETH to the merchant address, or web3 name, shown on screen.

Step 04

Merchant confirms

The merchant watches the chain and releases your goods or services once Unichain confirms.

Where you can pay

Online stores

Any merchant running U.CASH Pay can take your ETH at checkout.

Invoices

Pay a Pay-Now invoice or billing request in Unichain, straight from your wallet.

Donations and tips

Support creators and causes with ETH, no intermediary taking a cut.

In person

Pay merchants and converters face to face; they watch the chain for your payment.

Subscriptions

Recurring billing handled per-cycle, settled direct to the merchant.

AI agents

Pay agents per request over the HTTP-402 protocol using ETH.

Pay with more than Unichain

Ethereum (ETH)

The leading smart-contract blockchain and home of ERC-20.

Base (ETH)

Ethereum L2 built on the OP Stack.

Arbitrum (ETH)

Leading Ethereum L2 by activity.

Polygon (POL)

EVM sidechain built for fast, cheap payments.

Worldchain (ETH)

OP Stack Ethereum L2 for scaled human networks.

Optimism (ETH)

Ethereum L2 and home of the OP Stack.

Before you start

Getting started takes a wallet and an address. The wallet needs to hold Unichain and a little ETH for gas on its chain; the address is where the output lands, raw hex or a resolvable web3 name both work. From there the flow is preview-first: what leaves, what arrives, the fee, and the network cost all sit on one screen before a signature happens. Keys never leave your side at any point, and the only thing the wallet ever signs is the exact transaction you read.

Fees and settlement

Two costs, both visible up front. The platform charges a flat 0.50% all-in on the swap and nothing hidden behind it, no spread and no routing cut. The network charges its gas in ETH, settling with about 1 sec blocks on Optimistic Rollup (OP Stack, Superchain), itemized per leg in the preview. What settles is on-chain to the address you chose, under this asset's policy of Credited after L2 confirmation; deeper finality once the optimistic batch settles on Ethereum., and once confirmed the balance is entirely yours to move with no platform anywhere in the path.

Execution runs through the aggregated DEX route, which means the number you approved is the number that happens or the transaction reverts: swaps are atomic, with no half-settled state to unwind and no exposure window between legs. If a route cannot fill at your approved bounds it fails cleanly and you re-quote, which is the failure mode you want, cheap and loud rather than silent and expensive.

Paying with Unichain: FAQ

Where can I spend Unichain?
Any merchant running U.CASH Pay can accept your ETH at checkout, plus invoices, donations, and in-person payments.
Can I get a refund in Unichain?
Refunds are up to the merchant, but Unichain refunds are simple: the merchant sends ETH back to your wallet address.
Do I pay network fees to pay with Unichain?
Yes. You pay the Unichain network fee for your transaction. On efficient chains that is a fraction of a cent.

Pay with Unichain anywhere

Final, low-fee, borderless payments direct from your wallet to the merchant.