uu.onl

u.cash

Universal Cash · the network

DNS · Crypto · AI · Apps.

Four infrastructures, one network, powered by the UCASH token. U.CASH is the platform behind internet, money, intelligence, and the apps that run on them.

Explore the network → Get UCASH

Four core infrastructures 50+ apps & services Powered by UCASH Building since 2017

🌐 Internet & Domains

DNS, domains, hosting, web3 identity.

DNS

📦 Business Apps

Commerce, bounties, services.

Apps

Core infrastructures

50+

Apps & services

650K+

Network users

2017

Building since

Internet & Domains

DNS infrastructure for the network

Domains, hosting, email, and web3 identity - the naming and presence layer everything else runs on.

Unregistrar

Domain names, web hosting, and email at wholesale pricing - with holder discounts for the ecosystem.

unregistrar.com →

.u / @u identity

Web3 handles that are your identity and your wallet - own a .u (Unstoppable) or @u (FIO), self-custodial.

.u@u

Web3 name resolution

Resolve any .u / @u / ENS to an address via the pay.u.cash engine - payable-by-name for any app.

ENSUDFIO

Payments & Digital Assets

Money on the network

Crypto and card payments, the exchange, the UCASH token, and the U.ONLine settlement chain - the digital-asset infrastructure.

pay.u.cash

Crypto + card payments in one white-label, non-custodial checkout. The network's payments rail.

u.cash →

swap.u.cash

Swap UCASH and other assets directly from your wallet - non-custodial, multi-chain.

swap.u.cash →

UCASH + U.ONLine

The network token and its native settlement chain - fast, low-fee, on-chain digital-asset infrastructure.

UCASH & contracts →

See u.cash payments →

Artificial Intelligence

Let agents pay their own way

Agent-native payments and commerce standards - charge for every API call, inference, or tool use, non-custodial.

agents.u.cash

HTTP 402 agent payments - AI agents pay per request, on-chain or via their own Stripe.

agents.u.cash →

UCP

The Universal Checkout Protocol - an open standard for agentic commerce and discovery.

ucp.dev →

402 protocol

The open pay-per-request standard - the door agents walk through to pay for digital resources.

402.onl →

Business Applications

Apps & services on the network

Commerce, earning, and premium services - the business layer where UCASH gets used every day.

Umerce

B2B/B2C digital services, e-commerce plans, AI tools, and marketing - payable in UCASH with holder discounts.

umerchants.com →

u.builders

Earn UCASH through the Ongoing Bounty Offering - open to everyone worldwide since 2017.

u.builders →

Unverification

Verify UCASH holdings to unlock ecosystem-wide premium benefits, priority support, and discounts.

unverification.com →

The connective token

One token across all four.

UCASH is the network access token - pay with it, earn it, access premium with it, and use it as native gas on U.ONLine. It's the single thread running through DNS, Crypto, AI, and Apps.

Get UCASH → Contracts

UCASHnetwork token

DNSinternet

Cryptomoney

AIintelligence

Appsbusiness

One network. Four infrastructures.

UCASH powers internet, money, intelligence, and apps - start where it matters most to you.

u.cash - payments → Get UCASH

FAQ

Questions, answered

What is u.onl?

u.onl is the network hub - the overview of the U.CASH ecosystem organized around four core infrastructures: Internet & Domains (DNS), Payments & Digital Assets (Crypto), Artificial Intelligence (AI), and Business Applications (Apps).

What are the four core infrastructures?

DNS (domains, hosting, web3 identity), Crypto (payments, exchange, UCASH, U.ONLine), AI (agent payments, HTTP 402, UCP), and Apps (commerce, bounties, services). Everything U.CASH does falls under one of these four.

What is UCASH?

UCASH is the network access token - the connective tissue across all four infrastructures. Use it to pay, earn, access premium, and as native gas on U.ONLine. It lives on Ethereum, Polygon, Base, and natively on U.ONLine.

Where do I actually accept payments?

On u.cash - the crypto + card payments property of the network. u.onl is the overview; u.cash is where you integrate checkout.

How do the sites relate?

u.onl is the umbrella (the four infrastructures). u.cash is Crypto (payments). agents.u.cash is AI. swap.u.cash is the exchange. Each infrastructure has its own property - u.onl ties them together.