Portal Names
U.CASH Names · web3 identity

Your .u, your name across Web3.

A .u domain is your identity, your login, and your pay address in one name. Search it, claim it on Unstoppable Domains, and use it everywhere.

Search your .u name → Learn more
.u on Base One-time, forever 30+ chain resolution Web3 login Pay address @u handle (soon)
What it is

One name for identity, login, and pay

U.CASH Names lets you claim a .u web3 domain through the Unstoppable Domains Web3 Partner API: a blockchain name you own as an NFT, minted on Base. One name replaces long wallet addresses and works as your identity, your decentralized login, and your cross-chain pay address. A matching @u handle via FIO Protocol is on the roadmap so anyone can send to you by a readable name across wallets.

How it works

Search, claim, resolve

01

Search a name

Type the name you want. U.CASH Names checks live availability against the Unstoppable Domains resolution API and shows whether the .u is free or taken.

02

Claim your .u

Buy it on Unstoppable Domains with a one-time payment. The domain mints as an NFT on Base to your wallet, with no annual renewals.

03

Pay through U.CASH Pay

Checkout runs through the U.CASH Pay spine in operator context. Pay in Bitcoin, Ethereum, Tether, or UCASH. A per-minute cron reconciles your transaction.

04

Mint and resolve

On confirmed payment, U.CASH Names registers the domain at Unstoppable Domains and sets crypto records so the name resolves to your wallet immediately.

05

Set your addresses

Add your Bitcoin, Ethereum, Solana, Polygon, Base, UCASH, and more addresses so a single .u resolves across 30+ chains.

06

Use it everywhere

Share yourname.u. Get paid, log in to the decentralized web, and show your verified profile across Web3 and every U.CASH app.

.u vs a typical domain

Owned, not leased

Aspect
U.CASH .u
Typical DNS domain
Name type
Web3 domain, NFT on Base
Traditional DNS TLD
Owned as
NFT in your wallet
Lease renewed yearly
Pricing
One-time, no renewals
Annual recurring fee
Resolves across
30+ chains
DNS records only
Login / identity
Web3 SSO + profile
n/a
Get paid
Send crypto to a name
n/a
firstname.uusername.upay.usatoshi.ulisa.u
Capabilities

What a .u can do

Own it forever

A one-time payment and the .u domain is yours for life, minted as an NFT on Base. No annual renewals, ever.

Multi-chain resolution

Set a Bitcoin, Ethereum, Solana, Polygon, Base, and UCASH address on a single name. It resolves across the 30+ chains U.CASH supports.

A name to get paid

Anyone can send crypto to yourname.u and it reaches your wallet. No more copy-pasting long hex addresses.

Web3 single sign-on

Sign in to the decentralized web in a few clicks without giving up your privacy. Your .u is your Web3 login.

Verified profile

Link your Twitter, Discord, and Telegram, verify your socials, and own a profile page that proves your identity.

Decentralized website

Host a censorship-resistant site on IPFS and point your .u at it. Your content, your domain, your rules.

Yours to transfer

The domain is an NFT in your own wallet. No middleman holds it. Move it, sell it, or transfer it anywhere, any time.

How it fits in U.CASH

Names and the rest of the network

A .u is the readable layer over wallets across every U.CASH app.

yourname.u.u domain
BTC
ETH
SOL
MATIC
Base
UCASH
+25 chains
FAQ

Questions, answered

What is a .u domain?
A .u is a Web3 (blockchain) domain you own as an NFT, minted on Base. It replaces long wallet addresses with a readable name and works as your identity, login, and pay address. U.CASH has partnered with Unstoppable Domains to launch the .u TLD.
What is the @u handle and when is it coming?
The @u handle is a FIO Protocol name that pairs with your .u so anyone can send to you across wallets by a readable handle. U.CASH Names is integrating FIO now: it is on the roadmap.
How do I buy a .u?
Search a name in the bar. U.CASH Names checks live availability against the Unstoppable Domains API, then sends you to Unstoppable Domains to complete the purchase. It is a one-time payment, and the domain is yours for life.
Are there renewal fees?
No. You pay once and own the domain forever. There are no annual renewals.
Which chains does a .u resolve to?
You can set a Bitcoin, Ethereum, Solana, Polygon, Base, UCASH, and more address on a single .u name, so it resolves across the 30+ chains U.CASH supports.
How do I pay someone with their .u?
In any U.CASH Pay checkout, type their .u as the destination instead of an address. U.CASH resolves the name to their wallet and sends the payment there.

Claim your .u

Your identity, login, and pay address in one name. One-time payment, yours forever.

Search your .u name → About U.CASH Pay