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Getting started

Integrating UAS

The Universal Access Schema (UAS) is a standardized, deterministic URL format that makes any verified on-chain asset instantly reachable — anywhere a link can be placed.

Overview

No APIs. No SDKs. No contracts to deploy. Just a link that routes intent through the ONCHAIN® stack.

Anywhere a link can be placed, the UAS can be embedded. It behaves like mailto:, sms:, or the deep links used by mobile apps — a deterministic addressing layer for on-chain value.

Universal Access Schema

The format:

https://onchain.channel/[chain]/[address]

That URL is the integration. Each link encodes a BuyIntent specifying:

  • Chain
  • Token contract
  • Verified metadata (via Smart Guardrails)
  • Execution path

Click → Payment → Deterministic on-chain settlement.

Supported chains

ChainSlugStatus
EthereumethereumSupported
BasebaseSupported
BNB ChainbnbchainSupported
PolygonpolygonSupported
ArbitrumarbitrumSupported
OptimismoptimismSupported
AvalancheavalancheSupported
LinealineaSupported
ScrollscrollSupported
zkSynczksyncSupported
Polygon zkEVMpolygon-zkevmSupported
MantlemantleSupported
BlastblastSupported
ModemodeSupported
ZorazoraSupported
UnichainunichainSupported
World ChainworldSupported
InkinkSupported
SonicsonicSupported
GnosisgnosisSupported
CeloceloSupported
CronoscronosSupported
FantomfantomSupported
MoonbeammoonbeamSupported
MoonrivermoonriverSupported
MetismetisSupported
Manta PacificmantaSupported
AuroraauroraSupported
BobabobaSupported
FusefuseSupported
KavakavaSupported
KlaytnklaytnSupported
HarmonyharmonySupported
IoTeXiotexSupported
ConfluxconfluxSupported
FlareflareSupported
RoninroninSupported
Immutable zkEVMimmutableSupported
XDCxdcSupported
PlumeplumeSupported
MorphmorphSupported
HyperEVMhyperevmSupported
SeiseiSupported
SolanasolanaImminent
MonadmonadPlanned
StarknetstarknetPlanned
SuisuiPlanned
AptosaptosPlanned
TONtonPlanned
TrontronPlanned
NearnearPlanned
InjectiveinjectivePlanned
BitcoinbitcoinPlanned
Additional EVMsvariesPlanned

Integrator mental model

UAS is not an API, SDK, or widget — it is a protocol primitive. Think in terms of context, interpretation, and execution.

1. You provide context

The integrator chooses the chain and the token contract.

2. Gateway interprets the intent

The ONCHAIN® Gateway loads the asset, checks verification and compliance, and prepares payment routes.

3. Protocol executes

The protocol fulfills the intent natively on the asset's home chain:

  • no bridges
  • no wrapping
  • no custody

4. Tokens land directly in the user's wallet

Fully settled, verified, final, on-chain.

A UAS link encodes everything required for execution directly in the URL. There is no session state, no custody handoff, and no dependency on listings, approvals, or negotiated routing.

Links are portable and permissionless — execution intent can originate from any surface (wallets, bots, launchpads, explorers, external apps) while settling locally and natively on-chain.

Key principles

  • All execution context is encoded in the link
  • No custody, no session state, no platform control
  • Attribution is optional and informational only
  • Execution behavior is deterministic and surface-agnostic

Examples

Direct token link

https://onchain.channel/base/0x1234abcd...

Telegram bot

"Buy → https://onchain.channel/" + chain + "/" + address

Website CTA

<a href="https://onchain.channel/polygon/0xABC...">Buy with ONCHAIN</a>

Behind the scenes

When a user clicks a UAS link, the following sequence happens automatically:

1. Gateway loads context

  • Detects the chain slug
  • Loads the token contract
  • Confirms the asset is cleared by Smart Guardrails
  • Prepares available payment options (fiat or crypto)

2. User completes payment

  • Cards
  • Apple Pay / Google Pay
  • Local payment methods
  • Native crypto (where supported)

3. Gateway verifies payment

Payment confirmation triggers a BuyIntent that is sent to the protocol.

4. Protocol executes deterministically

  • Sources liquidity from the asset's home chain
  • Performs native DEX execution
  • Avoids bridges, wrappers, and intermediaries
  • Enforces deterministic settlement rules

5. Final settlement to the user's wallet

  • No custody
  • No pooled funds
  • No manual approvals
  • No extra transactions

Summary

The entire backend collapses into one principle: the URL encodes the intent, Gateway interprets it, the protocol fulfills it. That's why UAS works across wallets, bots, sites, and everywhere a link can exist.

Claim your token page

Every token on every supported chain already has a UAS page at onchain.channel/<chain>/<address> — no listing, no application, no gatekeeper. If you're the project behind the token, you can claim that page and take control of how your asset is presented across the entire network of wallets, bots, and sites that resolve UAS links.

Decentralized, on-chain proof of control

Claims are verified cryptographically against the contract itself — there is no support ticket, no KYC, and no human review. A wallet proves it controls the project by satisfying any one of the following, checked live on-chain:

  • Ownable — the wallet matches owner() on the contract.
  • AccessControl — the wallet holds DEFAULT_ADMIN_ROLE.
  • Deployer — the wallet is the original contract creator.

The connected wallet signs a nonce issued by the Gateway, the signature is verified, and the on-chain check runs against the contract in real time. Pass any tier and the page is yours — instantly and permissionlessly.

What claiming unlocks

  • Edit the description, logo, and long-form project copy
  • Attach official socials, website, docs, and audit links
  • Promote your token with verified-owner badging on the page
  • Update metadata at any time — every edit is signed by your wallet
  • Cashback and campaign tooling for owner-led promotion
  • Same universal URL your community and integrators already share

How to claim

  • Go to onchain.channel/projects and connect the project wallet.
  • Paste the token contract address and pick its chain.
  • Sign the ownership nonce — the Gateway verifies the tier automatically.
  • Edit your page. Publish. It's live everywhere UAS resolves.

Because the URL is the interface, claiming a page doesn't change the link — it upgrades what the link renders. Every wallet, bot, and site pointing at your token instantly reflects the verified, owner-curated profile.

What you don't need

  • No backend server
  • No signing
  • No API keys
  • No auth
  • No rate limits
  • No RPC calls
  • No gas logic
  • No ABI knowledge

If you can construct a string, you can integrate the Universal Access Schema. The entire model collapses into one operation: generate the URL → display the URL → user clicks the URL.

Try it

Generate your first link

Pick a chain and paste a token contract — your UAS link is ready to share.

Open the generator