Accept payments

Accept Ink (ETH) payments

Accept ETH and tokens on Ink with a non-custodial checkout that settles directly to your wallet on the OP Stack L2.

Why accept Ink

Merchants choose U.CASH to take ETH without giving up custody or control.

Non-custodial

ETH settles straight to your wallet. U.CASH routes and notifies, it never holds your funds.

Cards too

Offer fiat cards through your own merchant account in the same checkout, side by side with ETH.

White-label

Your logo, colors, and domain. The payment surface is yours; U.CASH is just the rails.

Low, transparent fees

A flat fee per transaction, no spreads, no hidden routing cuts. You see exactly what you pay.

Global by default

Anyone with a Ink wallet can pay. No chargebacks, no geography holds.

Per-coin finality

You set what counts as paid. Tune the confirmation policy for ETH per store.

How Ink payments work

Step 01

Create your checkout

Sign up at U.CASH Pay and create a checkout that accepts Ink alongside cards on 35 networks.

Step 02

Share the link or embed

Send a Pay-Now link, drop in the universal embed, or call the API server-side.

Step 03

Customer pays in ETH

The payer chooses Ink from any wallet. U.CASH watches the chain against your confirmation policy.

Step 04

Settle to your wallet

Once confirmed, ETH settles on-chain to the address you control, with a signed webhook.

How to start accepting Ink

Live in minutes. Drop a button on any site, or call the API server-side.

<!-- Universal embed: accepts ETH and 35 networks -->
<script src="https://pay.u.cash/js/client.js" async></script>
<div data-uxc="checkout" data-title="Ink payment"></div>

Ways to accept Ink

API

Create checkouts server-side with signed, replay-safe webhooks. Build any flow.

Embed and buttons

A universal embed script and Pay-Now buttons for any website, no backend needed.

E-commerce plugins

WooCommerce, Shopify, Magento, and 125+ integrations across the stack.

Invoices and requests

Email a Pay-Now link or a full invoice and get paid without a storefront.

POS and donations

Mobile POS apps and donation overlays for in-person and creator use.

Web3 names

Pay and pay out to ENS, Unstoppable Domains, and FIO handles, not raw addresses.

Fees and settlement

Settlement

On-chain, peer to peer, direct to the wallet address you configured. No pooled balance.

Confirmations

Ink default policy: Credited with a confirmation policy tuned to the optimistic rollup's fast block production.. Adjustable per store.

Payouts

Auto-forward to an xpub or address, or hold in your own wallet and withdraw anytime.

Accept more than Ink

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.

Abstract (ETH)

Consumer-focused Ethereum ZK L2.

Optimism (ETH)

Ethereum L2 and home of the OP Stack.

Before you start

The setup is deliberately short. One wallet capable of holding Ink and a little ETH 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

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 2 sec blocks on Optimistic Rollup (OP Stack), itemized per leg in the preview. What settles is on-chain to the address you chose, under this asset's policy of Credited with a confirmation policy tuned to the optimistic rollup's fast block production., and once confirmed the balance is entirely yours to move with no platform anywhere in the path.

Underneath, the aggregated DEX route executes the trade with all-or-nothing semantics: partial fills do not exist here, and a route unable to meet the bounds you approved reverts the whole transaction rather than settling something worse. Your exposure window between legs is therefore zero, the only cost of a failed attempt is its gas, and re-quoting is a click.

Accepting Ink: FAQ

How do I accept payments on Ink?
Generate a non-custodial checkout for ETH or any token on Ink. Funds settle directly to your wallet once confirmed.
Is Ink non-custodial on U.CASH?
Yes. You hold the keys and funds land in your own wallet. U.CASH never custodies your assets.
How fast do Ink payments confirm at checkout?
~2 sec blocks per Optimistic Rollup (OP Stack), with the confirmation policy stated per asset. The buyer watches the same status the checkout acts on.
Can I convert Ink receipts automatically?
Yes: set auto-conversion into the settlement asset you keep, and the conversion executes at the payment-time rate. Hold or convert is a setting, changeable anytime.

Start accepting Ink today

Non-custodial checkout for ETH and 35 networks, live in minutes.