Adding Networks to Metamask
To use multiple networks in Metamask, you must add each network to Metamask. Use https://chainlist.org/ to easily add every network with one click. Alternatively, open Metamask, navigate to the settings page and click the Networks menu. Then use the "Add Network" button. You'll then need to enter the following info for each network:
Binance Smart Chain
https://bsc-dataseed.binance.org/
56
BNB
https://bscscan.com
Polygon
https://polygon-rpc.com/
137
MATIC
https://polygonscan.com
Avalanche
https://api.avax.network/ext/bc/C/rpc
43114
AVAX
https://snowtrace.io
Arbitrum
https://arb1.arbitrum.io/rpc
42161
ETH
https://arbiscan.io
Fantom Opera
https://rpc.ftm.tools/
250
FTM
https://ftmscan.com
Optimism
https://mainnet.optimism.io
10
ETH
https://optimistic.etherscan.io
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