1gateway

Use when an agent must price or time a Base transaction. Input: none. Output: JSON current and next base fee, priority fee tiers (slow/standard/fast from the last 20 blocks), suggested maxFeePerGas, block fullness, and typical cost of an ETH transfer, ERC-20 transfer/approve, DEX swap, NFT mint and contract deploy (L2 fee + L1 data fee) in ETH and USD. Example: /v1/onchain/base/gas

Open endpoint ↗

Price per call: $0.002
Chain: Base
Method: GET
Paid calls · 30 days: 3

Call it from code

This API is run by its own provider and paid directly through x402. We list it so you can find it; we don't route or hold the payment.

import { x402Client, wrapFetchWithPayment } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";

const client = new x402Client();
registerExactEvmScheme(client, { signer: agentAccount });

const pay = wrapFetchWithPayment(fetch, client);
const res = await pay("https://1gateway.dev/v1/onchain/base/gas", { method: "GET" });
console.log(await res.json());

https://1gateway.dev/v1/onchain/base/gas