base-gas-x402 · GAS

GETBase

$0.005

per call · USD Coin on Base

Live Base mainnet gas: EIP-1559 base fee, low/medium/high priority tiers in gwei, and a transaction cost estimate for any gas limit.

Endpoint

GET https://base-gas-x402-production.up.railway.app/gas

709

Calls / 30d

Unique payers / 30d

Sep 10

Last called

exact

Payment scheme

Call this service

TypeScript · @x402/fetch

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://base-gas-x402-production.up.railway.app/gas", {
  method: "GET",
});
const data = await res.json();

cURL

curl -X GET \
  "https://base-gas-x402-production.up.railway.app/gas?gasLimit=21000" \
  -H "X-PAYMENT: <signed x402 payment>"

Example response

{
  "baseFeePerGas": "0.012",
  "blockNumber": "12345678",
  "chain": "base-mainnet",
  "chainId": 8453,
  "estimatedTransferCost": {
    "eth": "0.000000294",
    "gasLimit": 21000,
    "gwei": "294"
  },
  "fetchedAt": "2026-06-22T00:00:00.000Z",
  "gasPrice": "0.014",
  "priorityFeePerGas": {
    "high": "0.004",
    "low": "0.001",
    "medium": "0.002"
  }
}

Payment details

Pay to0x0d083590c048a243e24a75e3a7c968145de25b44

AssetUSD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913

NetworksBase

Schemesexact

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base-gas-x402 · GAS

Endpoint

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Example response

Payment details

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