How to Add Optimism To Metamask

Overview

Optimism is a Layer 2 scaling solution that makes Ethereum transactions cheaper and faster.

This section will include ways to add Optimism Mainnet and Kovan Testnet as your custom MetaMask RPC node provider.

There are two networks on Optimism: Mainnet and Kovan testnet. The endpoints are as follows:

This is an essential step. Just do it. here.

Since Optimism is a Layer 2 solution, be sure to select the Ethereum + L2 Ecosystem during sign-up.

Check out these instructions for creating a new app. Make sure to specify Optimism as the chain and choose Mainnet or Kovan as the network.

Alchemy provides an Add To Wallet button for Optimism apps.

This is a more convenient way to add the Optimism network to your Metamask wallet rather than manually configuring it.

That's it! You should see your Metamask work a lot better now 😉

The below instructions are for updating your Metamask RPC manually instead of using the "Add to Wallet" button.

After creating your app, you should be able to see your Alchemy app’s chain matches the chain you want to connect to.

Here, you can find your HTTP which you will use for your RPC URL in Metamask.

Open Metamask and click the network name located at the top-right of the window

After clicking Save, you will be directly switched to Optimism within the dropdown list

That's it! You've now added the Optimism network with Alchemy connected.

Optimistic Testnet Kovan is an EVM equivalent Optimistic Rollup chain. Kovan is purely designed for testing purposes.

Adding the testnet is the same process as adding the mainnet shown above, with a few slight differences.

This will list all the default test networks within your network list. You can find this in Settings>Advanced>Show test Networks