⛽Live Gas Price
Fetch the live gas price from public RPC nodes on Base or Ethereum: wei per unit gas, converted to gwei, with a USD estimate for a standard 21,000-gas transfer using your own ETH price input. No API key needed.
Worked examples
Base gas price
GET /api/v1/crypto/gas-price?chain=baseðPriceUsd=3000
Result: 0.01 gwei on base
Ethereum gas price
GET /api/v1/crypto/gas-price?chain=ethereumðPriceUsd=3000
Result: 0.06 gwei on ethereum
Machine API (x402)
$0.002 / callThis tool is also a JSON API for AI agents. Requests without payment receive 402 Payment Required plus instructions; agents pay USDC on Base via the x402 protocol — no accounts, no API keys.
GET /api/v1/crypto/gas-price?chain=baseðPriceUsd=3000 HTTP/1.1
Host: localhost:3000
→ 402 (payment required, instructions in headers)
→ 200 (after X-PAYMENT header; JSON body below)
{
"tool": "crypto/gas-price",
"input": {"chain":"base","ethPriceUsd":3000},
"result": { "value": 0.01, "answer": "0.01 gwei on base" }
}Agent docs: /llms.txt · OpenAPI spec · integration guide
About this tool
Live gas price from public RPC nodes on Base or Ethereum, converted to gwei and USD. Feed this into transaction-explain or your own agent loop to decide whether to send now or wait for cheaper gas.
Frequently asked questions
Is this the same as Base fees on EIP-1559 chains?
Close — eth_gasPrice returns the suggested price including the current base fee plus a priority-fee estimate. Exact base fee per block is available from the block header.