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Base Estimate Gas

by base-estimate-gas in Onchain & crypto

x402 APIPassing, checked 4 h ago

Gas estimate for a Base mainnet swap or any other call (to/from/value/data) via eth_estimateGas, without broadcasting a transaction.

POST https://x402.agentindex.world/base/estimate-gas

Last 30 days

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Uptime
100%
Response time
75 ms typical, 78 ms slowest 5%
Last check
4 h ago
Next check
any minute now

How to call it

# See the payment challenge (nothing is charged)
curl -i -X POST "https://x402.agentindex.world/base/estimate-gas" \
  -H "content-type: application/json" \
  -d '{"from_address":"0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69d","to":"0xdb6882db2A406Bc1541988715842906Dfd4FD590","value_wei":0}'
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%2Fx402.agentindex.world%2Fbase%2Festimate-gas
const res = await pay("https://x402.agentindex.world/base/estimate-gas", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({"from_address":"0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69d","to":"0xdb6882db2A406Bc1541988715842906Dfd4FD590","value_wei":0}),
});
console.log(await res.json());

Example input

{
  "from_address": "0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69d",
  "to": "0xdb6882db2A406Bc1541988715842906Dfd4FD590",
  "value_wei": 0
}

Example output

{
  "from_address": "0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69d",
  "gas_estimate": 21000,
  "to": "0xdb6882db2A406Bc1541988715842906Dfd4FD590",
  "value_wei": 0
}

Security scan

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Recent checks

WhenResultHTTPTimePrice
4 h agoPassed402137 ms$0.004
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10 h agoPassed40272 ms$0.004
15 h agoPassed40278 ms$0.004