Switching Testnets in MetaMask (Sepolia, Polygon Amoy, Base, Arbitrum)

Token Lab can add and switch networks for you, but here’s how to do it manually if needed.

Open Token Lab →

Use the Lab’s Switcher (easiest)

1. Open /token-lab/ and connect your wallet.
2. Select a network from the dropdown and click Switch Network.
3. Approve in MetaMask (the Lab will add the network if MetaMask doesn’t have it yet).

Manual network details

Add a network in MetaMask → Settings > Networks > Add network using these settings:

Ethereum Sepolia

Network name: Ethereum Sepolia
RPC URL: https://rpc.sepolia.org
Chain ID: 11155111
Currency symbol: ETH
Block Explorer: https://sepolia.etherscan.io

Polygon Amoy

Network name: Polygon Amoy
RPC URL: https://rpc-amoy.polygon.technology
Chain ID: 80002
Currency symbol: MATIC
Block Explorer: https://www.oklink.com/amoy

Base Sepolia

Network name: Base Sepolia
RPC URL: https://sepolia.base.org
Chain ID: 84532
Currency symbol: ETH
Block Explorer: https://sepolia.basescan.org

Arbitrum Sepolia

Network name: Arbitrum Sepolia
RPC URL: https://sepolia-rollup.arbitrum.io/rpc
Chain ID: 421614
Currency symbol: ETH
Block Explorer: https://sepolia.arbiscan.io

After switching, grab some testnet ETH/MATIC from a faucet and deploy your token: Token Lab