eth_gasPrice

eth_gasPrice returns the node's suggested legacy gas price in wei for Arbitrum One, the ETH-gas Optimistic Rollup. It is a single-number snapshot of current fee conditions on the L2 — handy for a quick read, though it collapses Arbitrum's two-part cost (L2 execution plus L1 calldata posting) into one figure. Call https://arbitrum.therpc.io/YOUR_API_KEY (chain ID 42161) to get the current suggestion.

Use cases

• Quick sanity check of current Arbitrum One fee conditions before building a transaction.
• Populate the gasPrice field when constructing legacy (type-0) transactions for tooling that does not speak EIP-1559.
• Feed into a fee oracle as one data point alongside eth_feeHistory percentiles for a more robust Arbitrum fee estimate.

Parameters

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Response

Example request

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

Try it live in the Arbitrum One playground.

Errors & troubleshooting

Common pitfalls

• This is a derived value and can overestimate — for type-2 (EIP-1559) transactions on Arbitrum One prefer eth_maxPriorityFeePerGas together with eth_feeHistory, which separate the base fee from the tip.
• The result is in wei (ETH's smallest unit); to show it to users convert to gwei by dividing by 1e9, or to ETH by dividing by 1e18.

Supported networks

• Mainnet — Chain ID: 42161
• Sepolia — Chain ID: 421614

See also

• eth_maxPriorityFeePerGas
• eth_feeHistory
• eth_estimateGas

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