L2 gas comparison · L2 GAS Comparison

import { wrapFetchWithPayment } from "@x402/fetch";
import { privateKeyToAccount } from "viem/accounts";

const account = privateKeyToAccount(process.env.PRIVATE_KEY);
const fetchWithPay = wrapFetchWithPayment(fetch, account);

const res = await fetchWithPay("https://agent402.tools/api/l2-gas-comparison", {
  method: "POST",
  headers: { "Content-Type": "application/json" },
  body: JSON.stringify({
    "networks": [
      "ethereum",
      "base",
      "arbitrum",
      "optimism",
      "polygon"
    ]
  }),
});
const data = await res.json();

curl -X POST \
  "https://agent402.tools/api/l2-gas-comparison" \
  -H "Content-Type: application/json" \
  -d '{"networks":["ethereum","base","arbitrum","optimism","polygon"]}' \
  -H "X-PAYMENT: <signed x402 payment>"

{
  "cheapest": "base",
  "networks": [
    {
      "blockNumber": 22000000,
      "chainId": 8453,
      "gasPriceGwei": 0.1,
      "gasPriceWei": "100000000",
      "isL2": true,
      "network": "base"
    },
    {
      "blockNumber": 300000000,
      "chainId": 42161,
      "gasPriceGwei": 0.1,
      "gasPriceWei": "100000000",
      "isL2": true,
      "network": "arbitrum"
    },
    {
      "blockNumber": 22000000,
      "chainId": 1,
      "gasPriceGwei": 15,
      "gasPriceWei": "15000000000",
      "isL2": false,
      "network": "ethereum"
    }
  ],
  "queriedAt": "2026-06-22T19:00:00.000Z",
  "source": "alchemy"
}