Setup

Install the MetaMask extension from the Chrome Web Store. MetaMask is an Ethereum-based web3 wallet that simplifies token management and interaction with smart contracts.

You need to add the Sepolia Testnet and Kroma Sepolia networks manually, referring to the configuration details in the table below:

Manual network configuration

Network Name	Kroma Sepolia	Ethereum Sepolia
RPC URL	https://api.sepolia.kroma.network	https://rpc.sepolia.org
Chain ID	2358	11155111
Currency Symbol	ETH	ETH
Block Explorer URL	https://testnet.kroscan.io/	https://sepolia.etherscan.io

cf. You can also use https://blockscout.sepolia.kroma.network/ for the Block Explorer URL of Kroma Sepolia.

If you are seeing rate limit issues when testing with the public endpoint, we recommend signing up for a third-party provider.

Common Questions

if you don't see 'Sepolia test network' in MetaMask 🙋

• Method 1: Click on 'Show/hide test network' as shown. Then, enable 'Show test networks'.

• Method 2 (I don't look like the one shown above): Settings > Advanced > enable 'Show test networks'