> For the complete documentation index, see [llms.txt](https://docs.storageproofs.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.storageproofs.com/references/supported-networks.md).

# Supported Networks

Storage Proofs support various networks, enabling cross-chain data access and verification. Below is a list of currently supported networks and their connections.

### Mainnet

| Origin Chain | Destination Chain |
| ------------ | ----------------- |
| Ethereum     | Starknet          |

### Testnet

| Origin Chain     | Destination Chain  |
| ---------------- | ------------------ |
| Ethereum Sepolia | Ethereum Sepolia   |
| Ethereum Sepolia | Starknet Sepolia   |
| Ethereum Sepolia | zkSync Era Sepolia |
| Ethereum Sepolia | Optimism Sepolia   |
| Optimism Sepolia | Starknet Sepolia   |

## Chain IDs

For reference, here are the chain IDs for the supported networks:

* Ethereum Mainnet: 1
* Ethereum Sepolia: 11155111
* Starknet Mainnet: STARKNET
* Starknet Sepolia: SN\_SEPOLIA
* zkSync Era Sepolia: 300
* Optimism Sepolia: 11155420

When using the Herodotus API or interacting with smart contracts, make sure to use the correct chain IDs and contract addresses for your desired network.

## Future Support

We are continuously working on expanding our network support. For the most up-to-date information on supported networks or to request support for a specific network, please contact our team or check our official announcements.