How to manually add networks on MetaMask Wallet

Usually, you can add the networks on wallets automatically, once you are connecting your wallet to the 12Swap via a new network. But sometimes, the automatically configured RPC nodes may be abnormal, and you may face a challenge. Then you can add any EVM chain to Metamask manually. Please see the following way to restore the network connection of the MetaMask wallet:

1. Expand view, click my account then Settings

2. Click “Networks” on the right side, then you can modify RPC or add a network

3. After entering the info, then click "Save" in the wallet

Ethereum Settings:

Network Name: Ethereum Mainnet

New PCR URL: https://mainnet.infura.io/v3/

ChainID: 1

Symbol: ETH

Block Explorer: https://etherscan.io

Recommended RPC URL:

• https://mainnet.infura.io/v3/

• https://rpc.ankr.com/eth

• https://cloudflare-eth.com

BNB Smart Chain Settings:

Network Name: BNB Mainnet

New PCR URL: https://bsc-dataseed1.binance.org

ChainID: 56

Symbol: BNB

Block Explorer: https://bscscan.com/

Recommended RPC URL:

• https://bsc-dataseed.binance.org

• https://bsc-dataseed1.binance.org

• https://rpc.ankr.com/bsc

Polygon Settings:

Network Name: Matic Mainnet

New PCR URL: https://rpc-mainnet.maticvigil.com

ChainID: 137

Symbol: Matic

Block Explorer: https://polygonscan.com

Recommended RPC URL:

• https://rpc-mainnet.maticvigil.com

• https://polygon-rpc.com

• https://rpc.ankr.com/polygon

Fantom Settings:

Network Name: Fantom Mainnet

New PCR URL: https://rpcapi.fantom.network

ChainID: 250

Symbol: FTM

Block Explorer: https://ftmscan.com

Recommended RPC URL:

• https://rpcapi.fantom.network

• https://rpc.ftm.tools

• https://rpc.ankr.com/fantom

Cronos Settings:

Network Name: Cronos Mainnet

New PCR URL: https://evm-cronos.crypto.org

ChainID: 25

Symbol: CRO

Block Explorer: https://cronos.crypto.org/explorer

Recommended RPC URL:

• https://evm.cronos.org

• https://evm-cronos.crypto.org

Arbitrum Settings:

Network Name: Arbitrum Mainnet

New PCR URL: https://arb1.arbitrum.io/rpc

ChainID: 42161

Symbol: ETH

Block Explorer: https://arbiscan.io

Recommended RPC URL:

• https://arb1.arbitrum.io/rpc

• https://rpc.ankr.com/arbitrum

Avalanche Settings:

Network Name: AVAX C-Chain Mainnet

New PCR URL: https://api.avax.network/ext/bc/C/rpc

ChainID: 43114

Symbol: AVAX

Block Explorer: https://cchain.explorer.avax.network/

Recommended RPC URL:

• https://api.avax.network/ext/bc/C/rpc

• https://cchain.explorer.avax.network/

• https://rpc.ankr.com/avalanche