A name to log in
Sign in to the decentralized web in a few clicks, without giving up your privacy. Your .u is your Web3 single sign-on.
U.CASH Names · web3 identity
Your .u,
Your .u,
your name across Web3.
A .u domain is your identity, your login, and your pay address in one name. Search a name, claim it on Unstoppable Domains, and use it everywhere. A matching @u FIO handle is coming soon.
Search and purchase are powered by Unstoppable Domains. You finish your purchase on unstoppabledomains.com.
Pricing
One-time
Renewals
Never
Minted on
Base
Resolves across
30+ chains
What is a .u
One name for your whole Web3 life
A .u is a blockchain domain you own as an NFT. It replaces long wallet addresses with a name people can read, remember, and pay.
A name for your profile
Verify your socials, show your NFT avatar, and own your Web3 identity on a profile page that is unmistakably you.
A name to get paid
Anyone can send crypto to yourname.u and it reaches your wallet. No more copy-pasting hex addresses.
Features
Yours forever, on your terms
Buy it once and it is yours for life, with no renewal fees. Minted as an NFT on Base and resolvable across every chain U.CASH supports.
Own it forever
A one-time payment and the domain is yours for life. No annual renewals, ever.
Multi-chain
Set a Bitcoin, Ethereum, Solana, UCASH, and more address on one name. It resolves across 30+ chains.
Decentralized website
Host a censorship-resistant site on IPFS and point your .u at it. Your content, your domain, your rules.
Verified profile
Link your Twitter, Discord, and Telegram and prove your identity. Build trust with a verifiable profile page.
Yours to transfer
The domain is an NFT in your wallet. Move it, sell it, or transfer it anywhere you like.
Non-custodial
Your keys, your name. No middleman holds it. You control it from your own wallet.
On the roadmap
A matching @u handle, coming soon
Your .u is only the start. U.CASH Names is integrating FIO Protocol so every .u can come with a matching @u handle: a human-readable name for sending and receiving across wallets, with no copy-pasted addresses. Reserve your .u now and your matching @u will follow.
How it works
From search to your name in four steps
Step 01
Search a name
Type the name you want and hit Search. We send you straight to Unstoppable Domains to check it live.
Step 02
Claim your .u
Buy it on Unstoppable Domains with a one-time payment. It mints as an NFT on Base to your wallet.
Step 03
Set your addresses
Add your Bitcoin, Ethereum, Solana, UCASH, and more addresses to the name in your Unstoppable Domains account.
Step 04
Use it everywhere
Share yourname.u. Get paid, log in, and show your profile across Web3 and every U.CASH app.
Part of U.CASH
One name across the U.CASH network
Your .u works with every U.CASH app: pay to a name at U.CASH Pay, get paid, and manage your identity across the network. One account, every app.
U.CASH Pay
Accept crypto and cards. Pay to a .u name instead of a long address.
U.CASH Swap
Swap across 30 chains. Your wallet, your keys, your name.
U.CASH Buy
Get UCASH on Ethereum, Polygon, or Base, fast and non-custodial.
U.CASH Agents
HTTP 402 payments for AI agents. Let agents pay and get paid.
U.CASH Verify
Verify your UCASH balance and email to unlock benefits.
U.CASH hub
The whole network: pay, swap, buy, names, agents, and verify.
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 human-readable handle, no address copy-pasting. U.CASH Names is integrating FIO now: it is on the roadmap. Reserve your .u today and your matching @u will follow.
How do I buy a .u?
Search a name in the bar above. We send you to Unstoppable Domains to check availability and 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.
Is it non-custodial?
Yes. The domain is an NFT in your own wallet. No middleman holds it. You can transfer or sell it any time.
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.