eth_gasPrice

eth_gasPrice returns the node's suggested legacy gas price in wei — a single number that summarizes current Base fee conditions. Base is Coinbase's OP Stack rollup that uses ETH for gas, and L2 fees here are typically a small fraction of Ethereum L1's. Call it at https://base.therpc.io/YOUR_API_KEY (chain ID 8453) when you want a fast read of what a transaction is likely to cost, or to fill the gasPrice field of a legacy (type-0) transaction. It takes no parameters and costs a single CU.

Use cases

• Quick sanity check of current Base fee conditions before quoting a cost to a user.
• Populate the gasPrice field when you build a legacy type-0 transaction for a tool that does not yet support Base's EIP-1559 fields.
• Feed into a fee oracle as one data point alongside eth_feeHistory percentiles for a more robust Base fee estimate.

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": "eth_gasPrice",
7    "params": [],
8    "id": 1
9  }'

Try it live in the Base playground.

Errors & troubleshooting

Common pitfalls

• Base supports EIP-1559, so this legacy value is derived and can over-estimate — prefer eth_maxPriorityFeePerGas plus eth_feeHistory when you build type-2 transactions.
• The result is in wei; to show it to users convert to gwei by dividing by 1e9, or to ETH by dividing by 1e18, before display.

Supported networks

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

See also

• eth_maxPriorityFeePerGas
• eth_feeHistory
• eth_estimateGas

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":"eth_gasPrice","params":[]}'