> ## Documentation Index
> Fetch the complete documentation index at: https://developers.fd.xyz/llms.txt
> Use this file to discover all available pages before exploring further.

# Network Support

> Settle on any EVM-compatible chain. Need one that isn't listed? Let us know.

Prism can settle on any EVM-compatible chain. Merchants configure which chains and tokens to accept in the [Prism Console](https://apps.fd.xyz/prism/).

## Enabled Chains

The chains below are enabled today. Need one that isn't listed? [Contact us](/overview/resources/support).

### Mainnet

| Chain | Chain ID | Settlement Time | Gas Cost |
| - | - | - | - |
| Base | 8453 | \~2 seconds | Very low |
| Arbitrum | 42161 | \~2 seconds | Very low |
| BSC | 56 | \~3 seconds | Low |
| Ethereum | 1 | \~12 seconds | Higher |

## Enabled Tokens

Prism supports any ERC-20 token that implements [ERC-3009](https://eips.ethereum.org/EIPS/eip-3009) (`transferWithAuthorization`). The tokens below are enabled today. Need one that isn't listed? [Contact us](/overview/resources/support).

| Token | Symbol | Chains |
| - | - | - |
| First Digital USD | FDUSD | Ethereum, BSC |
| USD Coin | USDC | Ethereum, Base, BSC, Arbitrum |

<Note>
  In x402 payment requirements, the `asset` field is the token's **ERC-20 contract address** — not the symbol shown above. See the [API Reference](/prism/api-reference/endpoints) for example values.
</Note>

## Choosing a Chain

L2 chains (Base, Arbitrum) offer the fastest settlement and lowest gas. Consider these factors when choosing:

| Factor | Guidance |
| - | - |
| API monetization / micropayments | Base or Arbitrum (low gas, fast) |
| Large value transactions | Ethereum (deepest liquidity) |
| FDUSD settlement | BSC or Ethereum |
| Maximum agent compatibility | Accept multiple chains |

<Tip>
  Accept payments on multiple chains to maximize compatibility with different
  agent wallets. Settlement is simplest when both the agent and merchant operate
  on the same chain.
</Tip>

## Environments

| Component | URL |
| - | - |
| Prism Gateway | `https://prism-gw.fd.xyz` |
| Prism Console | `https://apps.fd.xyz/prism/` |

Test your integration on production with small amounts. The API and SDK work identically regardless of transaction size.


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