Metamask is one of the most popular browser add-ins for managing crypto wallets. It works with many networks. Here is a list of Metamask Network RPCs that can be added to Metamask. The network name links to the most authoritative source we could find for this network.

These are standard/mainnet metamask networks (for most users):

Chain Name Network Name Currency Symbol RPC URL(s) Chain ID Block Explorer URL
Avalanche Mainnet C-Chain AVAX https://api.avax.network/ext/bc/C/rpc (primary)
43114 https://cchain.explorer.avax.network/
Binance Smart Chain BNB https://bsc-dataseed.binance.org/ (primary)
wss://bsc-ws-node.nariox.org:443
56 https://bscscan.com
Ethereum Classic ETC https://www.ethercluster.com/etc (primary)
61 https://blockscout.com/etc/mainnet/
Fantom Opera (FTM) FTM https://rpc.ftm.tools/ (primary)
250 https://ftmscan.com/
Fuse Network FUSE https://rpc.fuse.io (primary)
0x7a https://explorer.fuse.io
Harmony Mainnet ONE https://api.harmony.one (primary)
1666600000 https://explorer.harmony.one/
HECO Chain (HT) HT https://http-mainnet.hecochain.com (primary)
wss://ws-mainnet-node.huobichain.com
128 https://hecoinfo.com
Moonriver MOVR https://rpc.moonriver.moonbeam.network (primary)
1285 https://blockscout.moonriver.moonbeam.network/
OKExChain (OKT) OKT https://exchainrpc.okex.org (primary)
66 https://www.oklink.com/okexchain/
POA (Proof of Autonomy) POA https://core.poanetwork.dev (primary)
99 https://blockscout.com/poa/core
Polygon MATIC MATIC https://polygon-rpc.com/ (primary)
wss://rpc-mainnet.matic.network
137 https://polygonscan.com/
xDai Chain xDai https://rpc.xdaichain.com/ (primary)
100 https://blockscout.com/xdai/mainnet

If you’re a needing to interact with testnets, here’s a list of those

Chain Name Network Name Currency Symbol RPC URL(s) Chain ID Block Explorer URL
Avalanche FUJI C-Chain AVAX https://api.avax-test.network/ext/bc/C/rpc (primary)
43113 https://cchain.explorer.avax-test.network
Binance Smart Chain - Testnet BNB https://data-seed-prebsc-1-s1.binance.org:8545/ (primary)
97 https://testnet.bscscan.com
Fantom Opera - Testnet FTM https://rpc.testnet.fantom.network/ (primary)
0xfa2 https://testnet.ftmscan.com/
Harmony Testnet ONE https://api.s0.b.hmny.io (primary)
1666700000 https://explorer.pops.one/
HECO Chain - Testnet HT https://http-testnet.hecochain.com (primary)
wss://ws-testnet.huobichain.com
256 https://scan-testnet.hecochain.com/
Moonbase Alpha MOVR https://rpc.testnet.moonbeam.network (primary)
1287 https://moonbase-blockscout.testnet.moonbeam.network/
OKExChain (OKT) - Testnet OKT https://exchaintesttmrpc.okex.org (primary)
65 https://www.oklink.com/okexchain-test/
POA Sokol Testnet POA https://sokol.poa.network (primary)
77 https://blockscout.com/poa/sokol