# Connecting via MetaMask

There are a few easy to ways connect to Optimistic Ethereum via MetaMask. The easiest way is to use chainid.link:

# Connecting manually

Alternatively, it's pretty easy to manually add a network to MetaMask. First, take a look at our Networks and Connection Details page and figure out which network you'd like to connect to. Then, follow these three easy steps:

  1. Open the MetaMask browser extension and click on the network name at the top of the pane:
click on network name
  1. Next, click the Custom RPC button at the bottom of the network list:
click on custom RPC button
  1. Now you'll be prompted to input your connection details. Make sure to refer to the Networks and Connection Details page and input the details for your desired network:
input connection details

Once you hit save, you'll be automatically connected to the network. You're ready to play with Optimistic Ethereum!

Having issues connecting?

Make sure you've correctly inputted all of your network details. In particular, make sure the chain ID you entered is correct. MetaMask likes to complain if your chain ID is invalid.