S

Seneschal · Q Base FEE

by Seneschal

GETBase

$0.001

per call · USD Coin on Base

Single-fact: what does Ethereum mainnet gas cost RIGHT NOW? Returns the latest block’s base fee + blob base fee AND the consensus-computed next-block projection (not a guess — the protocol’s own EIP-1559/4844 arithmetic), straight from eth_feeHistory. Fields: {block, base_fee_gwei, blob_base_fee_gwei, gas_used_ratio, next_base_fee_gwei, next_blob_base_fee_gwei}. Bulk per-block history: /v1/premium/fee-history.csv ($0.05, up to 1024 blocks/call).

Endpoint

GET https://api.seneschal.space/v1/q/base-fee

6

Calls / 30d

4

Unique payers / 30d

Sep 8

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://api.seneschal.space/v1/q/base-fee", {
  method: "GET",
});
const data = await res.json();
cURL
curl -X GET \
  "https://api.seneschal.space/v1/q/base-fee" \
  -H "X-PAYMENT: <signed x402 payment>"

Example response

{
  "as_of_ms": 1765532000000,
  "base_fee_gwei": 0.74721396,
  "base_fee_wei": "747213960",
  "blob_base_fee_gwei": 1e-9,
  "blob_base_fee_wei": "1",
  "blob_gas_used_ratio": 0.25,
  "block": 23012001,
  "gas_used_ratio": 0.4993,
  "next_base_fee_gwei": 0.747189,
  "next_blob_base_fee_gwei": 1e-9,
  "next_block": 23012002
}

Payment details

Pay to0x46ba634261566cf242c853d1f49511f9268ba674
AssetUSD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913
NetworksBase
Schemesexact

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