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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
All checks passedSome failedAll failedNot checked
- 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
- No findings. We scan names, descriptions and tool definitions for hidden instructions and other prompt-injection patterns.
Recent checks
| When | Result | HTTP | Time | Price |
|---|---|---|---|---|
| 4 h ago | Passed | 402 | 137 ms | $0.004 |
| 7 h ago | Passed | 402 | 75 ms | $0.004 |
| 10 h ago | Passed | 402 | 72 ms | $0.004 |
| 15 h ago | Passed | 402 | 78 ms | $0.004 |