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

# SKALE Chains

> Complete list of active SKALE Chains with RPC endpoints, chain IDs, and explorers

import SkaleChainBaseMainnet from "../../_snippets/skale-chain-base-mainnet.mdx"
import SkaleChainBaseTestnet from "../../_snippets/skale-chain-base-testnet.mdx"
import SkaleChainCalypsoMainnet from "../../_snippets/skale-chain-calypso-mainnet.mdx"
import SkaleChainCalypsoTestnet from "../../_snippets/skale-chain-calypso-testnet.mdx"
import SkaleChainEuropaMainnet from "../../_snippets/skale-chain-europa-mainnet.mdx"
import SkaleChainEuropaTestnet from "../../_snippets/skale-chain-europa-testnet.mdx"
import SkaleChainNebulaMainnet from "../../_snippets/skale-chain-nebula-mainnet.mdx"
import SkaleChainNebulaTestnet from "../../_snippets/skale-chain-nebula-testnet.mdx"

The following are active SKALE Chains. Chains are built on different base networks — either Base or Ethereum. The bridge mechanism depends on the base network:

* **Base chains**: Built on Base L2 with native bridge to/from Base
* **Ethereum chains**: Built on Ethereum with IMA (SKALE Interchain Messaging Agent) bridge to/from Ethereum

## SKALE Base Chains

*Built on Base L2 with native bridge to/from Base*

<SkaleChainBaseMainnet />

### Buy Credits

On SKALE Base Mainnet, compute is paid for using **CREDIT tokens**. To buy credits:

1. Go to **[https://base.skalenodes.com/credits](https://base.skalenodes.com/credits)**
2. Select **Buy credits** and choose payment method — USDC or SKL
3. Complete the purchase

<SkaleChainBaseTestnet />

## Ethereum-based Chains

*Built on Ethereum with IMA (Interchain Messaging Agent) bridge to/from Ethereum*

<SkaleChainCalypsoMainnet />

<SkaleChainCalypsoTestnet />

<SkaleChainEuropaMainnet />

<SkaleChainEuropaTestnet />

<SkaleChainNebulaMainnet />

<SkaleChainNebulaTestnet />