Pay

Pay with Sonic (S)

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

Why pay with Sonic

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

No chargebacks

S 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 Sonic

Step 01

Find a checkout

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

Step 02

Choose ${c.name}

Select S as your payment method from the supported coins.

Step 03

Pay from your wallet

Send S 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 Sonic confirms.

Where you can pay

Online stores

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

Invoices

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

Donations and tips

Support creators and causes with S, 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 S.

Pay with more than Sonic

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.

Berachain (BERA)

EVM L1 with Proof-of-Liquidity consensus.

Avalanche (AVAX)

Fast-finality EVM chain with sub-second settlement.

Before you start

The setup is deliberately short. One wallet capable of holding Sonic and a little S for gas on its chain, one receiving address for the output, and you have everything: a web3 name resolves to the address just as well as the raw string. Read the preview before signing, since it carries the whole trade at a glance, the amounts in and out, the fee, and the network cost. The wallet remains yours throughout and signs nothing you have not seen on screen, which is the whole security posture in one sentence.

Fees and settlement

The cost picture is two lines. The platform side is a flat 0.50% all-in on the swap, quoted before you sign, with no spread and no routing cut behind it. The network side is gas paid in S, settling with sub-second finality blocks on Proof-of-Stake DAG (ABFT), which the preview itemizes per leg. Settlement is on-chain to the address you chose: Credited once the transaction finalizes on-chain, typically well under a second. on this asset, after which the balance is spendable and non-custodial in the fullest sense, yours to move with no platform in the path.

The route runs on the aggregated DEX route, and atomicity is the property that matters: the approved number either happens in full or the transaction reverts with nothing moved but the attempt's gas. There is no resting state between legs where value sits in someone else's hands, and a route that misses your bounds simply fails clean, ready for a fresh quote. Cheap and loud beats silent and expensive as failure modes go.

Paying with Sonic: FAQ

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

Pay with Sonic anywhere

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