> **Can't find what you're looking for?** Use `search_docs` on the docs MCP server at `https://docs.modularium.art/api/mcp` to find what you need.

# Testing on Sepolia

Modularium has a second deployment on Sepolia, the Ethereum testnet: its own app, API and contracts. Test ETH is free, so use it to try an integration, a drop or a generative artwork end to end before you go to mainnet. Nothing carries over between the two networks.

| | Ethereum | Sepolia |
| --- | --- | --- |
| Chain ID | `1` | `11155111` |
| App | [modularium.art](https://modularium.art) | [sepolia.modularium.art](https://sepolia.modularium.art) |
| API | `https://api.modularium.art` | `https://api-sepolia.modularium.art` |
| API reference | [api.modularium.art/docs](https://api.modularium.art/docs) | [api-sepolia.modularium.art/docs](https://api-sepolia.modularium.art/docs) |
| Explorer | [etherscan.io](https://etherscan.io) | [sepolia.etherscan.io](https://sepolia.etherscan.io) |
| Contracts | [Addresses](/developers/contracts#addresses) | [Addresses](/developers/contracts#addresses) |

These docs link to mainnet. On Sepolia, swap `modularium.art` for `sepolia.modularium.art` and `api.modularium.art` for `api-sepolia.modularium.art`; paths and endpoints are the same.

## Getting started

1. Switch your wallet to Sepolia and get test ETH from the [Sepolia PoW faucet](https://sepolia-faucet.pk910.de/), which pays out for mining in your browser.
2. Use the app at [sepolia.modularium.art](https://sepolia.modularium.art), or call the Sepolia [contracts](/developers/contracts#addresses) directly. The forwarder has the same address on both networks; every other contract differs.
3. Read the results from the Sepolia API:

```bash
curl https://api-sepolia.modularium.art/collection/my-collection
```

With viem, use the `sepolia` chain from `viem/chains` and the Sepolia addresses.

## Generative artworks

The [artwork tester](https://sepolia.modularium.art/create/generative/test) needs no wallet on either network. To see the whole flow, from upload to minted tokens rendered by the platform, create the drop on [sepolia.modularium.art/create/generative](https://sepolia.modularium.art/create/generative) first.