eth_gasPrice

eth_gasPrice returns the node's suggested legacy gas price in wei — the per-gas price, denominated in MATIC's smallest unit, that a type-0 transaction would use right now. On Polygon PoS fees are famously low, but they do rise when the network is busy, so this is a fast way to read current conditions before building a transaction. Call https://polygon.therpc.io/YOUR_API_KEY (chain ID 137, 0x89) and you get a single hex value such as 0x6fc23ac00, which you convert to gwei by dividing by 1e9.

Use cases

• Quick sanity check of current Polygon fee conditions before sending — useful when MATIC gas spikes during heavy DeFi or Polymarket activity.
• Populate the gasPrice field when building a legacy (type-0) Polygon transaction for tooling that does not speak EIP-1559.
• Feed into a fee oracle as one data point alongside eth_feeHistory percentiles to cross-check the suggested MATIC price.

Parameters

此方法不需要任何参数，传入空数组 [] 即可。

Response

Example request

1curl https://polygon.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 Polygon playground.

Errors & troubleshooting

Common pitfalls

• Polygon supports EIP-1559, so this legacy value is derived and can overestimate — for type-2 transactions prefer eth_maxPriorityFeePerGas plus eth_feeHistory to set maxFeePerGas and the tip precisely.
• The result is in wei (the smallest MATIC unit); divide by 1e9 to show gwei, or by 1e18 to express it in whole MATIC, before displaying it to users.

Supported networks

• Mainnet — Chain ID: 137
• Amoy — Chain ID: 80002

See also

• eth_maxPriorityFeePerGas
• eth_feeHistory
• eth_estimateGas

1curl https://polygon.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":[]}'