$0.001
per call · USD Coin on Base
Multi-chain EVM gas price oracle for AI agents — 17 chains (Ethereum, Base, Arbitrum, Optimism, Polygon, BNB, Avalanche…). One x402 call returns slow/standard/fast EIP-1559 tiers as DROP-IN maxFeePerGas + maxPriorityFeePerGas in wei (plug straight into a viem/ethers tx, no conversion, exact even on sub-gwei L2s), plus base fee, head block, and fullness, from a live eth_feeHistory call. Pass ?chain= to switch chains.
Endpoint
GET https://evm-gas.apitoll.cloud/v1/evm/gas31
Calls / 30d
9
Unique payers / 30d
Sep 9
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://evm-gas.apitoll.cloud/v1/evm/gas", {
method: "GET",
});
const data = await res.json();curl -X GET \
"https://evm-gas.apitoll.cloud/v1/evm/gas?blocks=20&chain=ethereum" \
-H "X-PAYMENT: <signed x402 payment>"Example response
{
"base_fee_gwei": 8.421,
"base_fee_wei": "8421000000",
"block_number": 21403217,
"caip2": "eip155:1",
"chain": "ethereum",
"chain_name": "Ethereum mainnet",
"gas_model": "eip1559",
"stats": {
"blocks_sampled": 20,
"median_fullness_pct": 45.5,
"ts": "2026-05-28T15:42:30.000Z"
},
"tiers": {
"fast": {
"maxFeePerGas": "14831000000",
"maxPriorityFeePerGas": "2200000000",
"max_fee_gwei": 14.831,
"max_priority_gwei": 2.2
},
"slow": {
"maxFeePerGas": "12631000000",
"maxPriorityFeePerGas": "1000000",
"max_fee_gwei": 12.631,
"max_priority_gwei": 0.001
},
"standard": {
"maxFeePerGas": "13731000000",
"maxPriorityFeePerGas": "1100000000",
"max_fee_gwei": 13.731,
"max_priority_gwei": 1.1
}
}
}Payment details
0xcc69d619e6053f88a4845066518f465bd06fc96cUSD Coin · 0x833589fcd6edb6e08f4c7c32d4f71b54bda02913Is this your API?
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