L2 Gas Comparison

Last 30 days

Uptime

100%

Response time

188 ms typical, 188 ms slowest 5%

Last check

5 h ago

Next check

any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X POST "https://agent402.tools/api/l2-gas-comparison" \
  -H "content-type: application/json" \
  -d '{"networks":["ethereum","base","arbitrum","optimism","polygon"]}'

import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fagent402.tools%2Fapi%2Fl2-gas-comparison
const res = await pay("https://agent402.tools/api/l2-gas-comparison", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"networks":["ethereum","base","arbitrum","optimism","polygon"]}),
});
console.log(await res.json());

Example input

{
  "networks": [
    "ethereum",
    "base",
    "arbitrum",
    "optimism",
    "polygon"
  ]
}

Example output

{
  "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"
}

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