Universal Access Schema (UAS)

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

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

The Format

https://buy.onchain.money/[chain]/[address]

What the Schema Represents

Each link encodes a BuyIntent specifying:

1. Chain

2. Token contract

3. Verified metadata (via Smart Guardrails)

4. Execution path (via OPN)

Click → Payment → Deterministic on-chain settlement.

Supported Chains

Chain	Slug	Status
Ethereum	ethereum	Supported
Base	base	Supported
BNB Chain	bnbchain	Supported
Polygon	polygon	Supported
Solana	solana	Imminent
Additional EVMs	varies	Planned

Example Links

Direct Token

buy.onchain.money/base/0x1234abcd…

Telegram Bot

"Buy → https://buy.onchain.money/" + chain + "/" + address

Website CTA

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

What Happens When a User Opens a Link

1. Gateway loads token context

2. User selects payment method

3. Payment is verified

4. Gateway broadcasts a BuyIntent

5. OPN executes deterministically

6. Tokens settle directly to the user’s wallet

No bridges. No wrapping. No custody. No redirects.

Access becomes a primitive.