Adding the Polygon network in MetaMask

The MetaMask extension and mobile app have the Ethereum network added by default. You need to manually add the Polygon network.

1. Go to the network settings screen:

• In the MetaMask extension:
  Click your current blockchain network (Ethereum), and then click Add Network.
  
• In the MetaMask app:
  Tap the Menu button, and then tap Settings > Networks > Add Network.

2. Enter a network name. (For example, “Polygon Main Network”.)
3. Configure the following settings as specified:
4. RPC URL: https://polygon-rpc.com
5. Chain ID: 137
6. Symbol: MATIC
7. Block Explorer URL (optional): https://polygonscan.com/

Save your settings.