How to Add Optimism Testnet to MetaMask
The process of adding the Optimism testnet to your MetaMask wallet will vary slightly depending on which testnet you want to connect to. That said, ChainList makes it easy to connect to any of the testnets on Optimism (and all other networks) by aggregating the Chain ID and Network ID information and allowing users to quickly and easily connect.
Here is a simple step-by-step guide to getting started:
- Visit ChainList and connect your MetaMask Wallet.
- Select the 'Include Testnets' checkbox.
- Type in 'Optimism' in the search bar and find the testnet you want to connect to.
- Select 'Add to MetaMask' and the network will be added to your wallet.

How to Get Optimism Testnet Faucet Tokens
Once you have added the Optimism testnet to your MetaMask wallet, you can use faucet tokens to start testing or deploying applications. The easiest way to get faucet tokens for the Optimism testnet is directly from the Optimism ETH Faucet. All you need to do is visit the website, input your wallet address and select 'Request' to receive free Optimism faucet tokens.
What is the Optimism Testnet?
The Optimism Testnet is a testing environment for the Optimism Layer 2 scaling solution for Ethereum. There are currently 3 different testnet sanbox environments on the network that are Goerli, Kovan and Bedrock. Each testnet serves a diiferent purpose and allows developers to test out their applications before moving to the mainnet.
The Optimism Testnet provides a sandbox environment for developers and users to experiment with and test their smart contracts and DApps (decentralized applications) without incurring high gas fees or risking any real funds. It also enables users to experience the benefits of the Optimism protocol, such as faster confirmation times and lower transaction fees, in a simulated setting.
Final Thoughts
The Optimism Testnet is a valuable tool for developers and users looking to experiment with and test the Optimism Layer 2 scaling solution for Ethereum. Adding the Optimism testnet to your MetaMask wallet can be done easily through the ChainList App, which aggregates all EVM mainnet and testnet information and allows users to seamlessly connect to verified RPC and Chain IDs.