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

# Supported networks

> Networks configured for support on Atum's Payment Gateway, plus contract and token addresses.

## Overview

Networks and token pairs supported on Atum's Payment Gateway.

## Testnet support

To see which networks the gateway currently supports, ask it for its chain defaults:

```bash theme={null}
curl -sS https://payment-gw.production-testnet.atum.xyz/v1/defaults | jq
```

With no `chain_id`, it returns every chain the gateway serves, keyed by CAIP-2 id. A chain that isn't fully configured is left out of that listing, so what comes back is what you can actually pay on. A `200` here also tells you the gateway is up. A non-200 is a gateway-side answer, not a network problem: **404** means it resolved no chains and **503** means a dependency is down — in both cases the gateway is up and you have nothing to fix locally.

Use these identifiers when constructing payment requests or calling the API:

* **CAIP-2 chain ID** — used in asset identifiers (`sourceAsset`, `destinationAsset`) and the `/v1/defaults?chain_id=` query parameter
* **Chain ID** — used when configuring your wallet or RPC provider (e.g. MetaMask network settings, `ethers.JsonRpcProvider`)

| Network          | CAIP-2 chain ID                           | Chain ID   | Type           |
| ---------------- | ----------------------------------------- | ---------- | -------------- |
| Ethereum Sepolia | `eip155:11155111`                         | `11155111` | EVM testnet    |
| Solana devnet    | `solana:EtWTRABZaYq6iMfeYKouRu166VU2xqa1` | —          | Solana testnet |
| Tron Shasta      | `tron:shasta`                             | `shasta`   | Tron testnet   |
| Base Sepolia     | `eip155:84532`                            | `84532`    | EVM testnet    |
| Arbitrum Sepolia | `eip155:421614`                           | `421614`   | EVM testnet    |
| Tempo Moderato   | `eip155:42431`                            | `42431`    | Tempo testnet  |
| Optimism Sepolia | `eip155:11155420`                         | `11155420` | EVM testnet    |
| Polygon Amoy     | `eip155:80002`                            | `80002`    | EVM testnet    |
| Avalanche Fuji   | `eip155:43113`                            | `43113`    | EVM testnet    |
| Celo Sepolia     | `eip155:11142220`                         | `11142220` | EVM testnet    |

<Note>
  The table is a snapshot — `/v1/defaults` above is the authoritative live list.

  The [example apps](https://github.com/Atum-Labs/examples) are EVM-based, so they don't demonstrate Solana or Tron. Both are supported — use the identifiers above verbatim, since a wrong token variant is a common cause of a payment that silently doesn't land.
</Note>

## Mainnet support

The mainnet Payment Gateway serves Ethereum, Solana, Tron, Base, Arbitrum, Tempo, Optimism, Polygon, Avalanche, and Celo. Confirm the live list:

```bash theme={null}
curl -sS https://payment-gw.production-mainnet.atum.xyz/v1/defaults | jq
```

| Network   | CAIP-2 chain ID                           | Chain ID  | Type   |
| --------- | ----------------------------------------- | --------- | ------ |
| Ethereum  | `eip155:1`                                | `1`       | EVM    |
| Solana    | `solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp` | —         | Solana |
| Tron      | `tron:mainnet`                            | `mainnet` | Tron   |
| Base      | `eip155:8453`                             | `8453`    | EVM    |
| Arbitrum  | `eip155:42161`                            | `42161`   | EVM    |
| Tempo     | `eip155:4217`                             | `4217`    | Tempo  |
| Optimism  | `eip155:10`                               | `10`      | EVM    |
| Polygon   | `eip155:137`                              | `137`     | EVM    |
| Avalanche | `eip155:43114`                            | `43114`   | EVM    |
| Celo      | `eip155:42220`                            | `42220`   | EVM    |

<Note>
  The table is a snapshot. `/v1/defaults` on the mainnet gateway is the authoritative live list.

  Tempo corridors are access-gated. Contact your Atum representative for access. Asset identifiers are on [Supported assets](/get-started/reference/supported-assets#tempo-assets).
</Note>

## Tokenized money

For CAIP-19 asset identifiers for USDC, USDT, PYUSD, pathUSD, and other supported assets — see [Supported assets](/get-started/reference/supported-assets).