# Supported Chains

This page lists the blockchain networks currently supported by ONCHAIN Gateway for Universal Access Schema (UAS) execution.

When constructing UAS links, integrators must use the exact chain slug listed below.

Chain availability may change over time as support expands. Integrators should validate support where possible and fail gracefully if a chain is unavailable.

***

### Currently Supported Chains

| Chain     | Chain Slug | Status    |
| --------- | ---------- | --------- |
| Ethereum  | ethereum   | Supported |
| Polygon   | polygon    | Supported |
| Base      | base       | Supported |
| BNB Chain | bnb        | Supported |
| Solana    | solana     | Imminent  |

Only the chain slugs listed above are valid for UAS execution.

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### Usage in UAS Links

The chain slug is used directly in the UAS path:

```
https://buy.onchain.money/[chain]/[token]
```

Example:

```
https://buy.onchain.money/ethereum/0xabc123...
```

Using an unsupported or incorrect chain slug will prevent execution.

***

### Validation Guidance

* Chain slugs must be lowercase
* Chain slugs must match the table above exactly
* Unsupported chains will not execute
* No partial execution occurs on unsupported chains

Recommended behavior:

* Hide or disable execution surfaces when a chain is unsupported
* Fall back to native or alternative flows when appropriate

***

### Source of Truth

The list above reflects current ONCHAIN Gateway availability.

For the most up-to-date list of supported chains, refer to the official ONCHAIN Help Center documentation on compatible chains.

***

### Key Takeaway

When generating UAS links, always use a supported chain slug:

```
https://buy.onchain.money/[chain]/[token]
```