ToolVet
82trust / 100

Chain Gas Estimate

by api.x402node.dev in Onchain & crypto

x402 APIPassing, checked 3 h ago

Estimates the USD gas cost of a common action (transfer, erc20-transfer, approve, swap, nft-mint) across EVM chains, combining live gas price per chain with the native token price. Lets an agent pick the cheapest chain to execute and budget a transaction. Live aggregated gas + price compute. gas cost estimate, transaction fee usd, cheapest chain to execute, swap gas Accepts payment on Base or Solana — either network works.

GET https://api.x402node.dev/chain/gas-estimate

Last 30 days

All checks passedSome failedAll failedNot checked
Uptime
100%
Response time
166 ms typical, 166 ms slowest 5%
Last check
3 h ago
Next check
any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X GET "https://api.x402node.dev/chain/gas-estimate?action=string&chain=string&gas=string"
import { wrapFetchWithPayment } from "@x402/fetch";
import { x402Client } from "@x402/core/client";
import { ExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

const client = new x402Client().register(
  "eip155:8453",
  new ExactEvmScheme(privateKeyToAccount(process.env.AGENT_KEY)),
);
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? Preflight it first for $0.005:
// GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.x402node.dev%2Fchain%2Fgas-estimate
const res = await pay("https://api.x402node.dev/chain/gas-estimate?action=string&chain=string&gas=string");
console.log(await res.json());

Example input

{
  "action": "string",
  "chain": "string",
  "gas": "string"
}

Security scan

  • No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.

Recent checks

WhenResultHTTPTimePrice
3 h agoPassed402166 ms$0.012
8 h agoPassed402172 ms$0.012