net_version

net_version returns the network ID of the chain a node is connected to, as a decimal string. Base is Coinbase's OP Stack optimistic rollup that settles to Ethereum and pays gas in ETH, and on Base mainnet the network ID matches its chain ID — "8453". This call is the quickest way to confirm a node is pointed at the network you expect before you trust its responses. Send it to https://base.therpc.io/YOUR_API_KEY on chain ID 8453 (hex 0x2105) and read back the decimal string.

Use cases

• Verify a wallet or dApp is connected to Base mainnet — expecting network ID "8453" — before submitting an ETH transaction, guarding against sending to the wrong chain.
• Differentiate Base mainnet ("8453") from Base Sepolia ("84532") in environment-aware logic, so your app loads the right contract addresses and explorer links per network.

Parameters

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Response

Example request

1curl https://base.therpc.io/YOUR_API_KEY \
2  -X POST \
3  -H "Content-Type: application/json" \
4  -d '{
5    "jsonrpc": "2.0",
6    "method": "net_version",
7    "params": [],
8    "id": 1
9  }'

Try it live in the Base playground.

Errors & troubleshooting

Common pitfalls

• Network ID and chain ID coincide on Base mainnet (both 8453), but they are distinct concepts and can diverge on some networks. For EIP-155 transaction signing always use the chain ID from eth_chainId, not the value from net_version.
• net_version returns a decimal string ("8453"), unlike most numeric RPC responses on Base which are hex-encoded (eth_chainId returns "0x2105"). Do not assume a 0x prefix when parsing it.

Supported networks

• Mainnet — Chain ID: 8453
• Sepolia — Chain ID: 84532

See also

• eth_chainId
• net_listening
• net_peerCount

1curl https://base.therpc.io/YOUR_API_KEY \
2  -X POST \
3  -H 'Content-Type: application/json' \
4  -d '{"jsonrpc":"2.0","id":1,"method":"net_version","params":[]}'