$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-fee6
Calls / 30d
4
Unique payers / 30d
Sep 8
Last called
exact
Payment scheme
Call this service
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 -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
0x46ba634261566cf242c853d1f49511f9268ba674USD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913Is this your API?
Pin it to the top of Onchain Data and the homepage with a featured placement.
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