ToolVet
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Gas Price

by d21 gas_price in Onchain & crypto

x402 APIPassing, checked 4 h ago

Gas Price ($0.002): current Base gas market read live from Base's own public JSON-RPC, not a hosted gas-oracle vendor -- legacy gas price (eth_gasPrice), EIP-1559 base fee (latest block), and a suggested priority/max fee (eth_maxPriorityFeePerGas + a computed 2x-base-fee heuristic), all in gwei, plus a plain-transfer cost estimate. Base mainnet only. Body {} or { chain: "base" }. Check free /v1/gas_price/availability first.

POST https://draconic21-x402-api.onrender.com/v1/gas_price

Last 30 days

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Status and outage history · Atom feed

Uptime
100%
Response time
611 ms typical, 1.6 s slowest 5%
Last check
4 h ago
Next check
any minute now

How to call it

POST https://draconic21-x402-api.onrender.com/v1/gas_price

Each call costs $0.002 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

POST https://draconic21-x402-api.onrender.com/v1/gas_price
content-type: application/json

{
  "chain": "base"
}

Parameters

ParameterTypeRequiredDescription
chainstringNoOnly 'base' is supported today; omit or pass "base". One of: base.

Example response

The provider's example. We can't check it without paying.

{
  "base_fee_gwei": 0.01,
  "caveats": [
    "Base mainnet only (eip155:8453) -- no other chain is read by this route today."
  ],
  "chain": "Base",
  "gas_price_gwei": 0.012,
  "native_symbol": "ETH",
  "suggested_max_fee_gwei": 0.021,
  "suggested_priority_fee_gwei": 0.001
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.002.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://draconic21-x402-api.onrender.com/v1/gas_price' \
  -H 'content-type: application/json' \
  --data-raw '{"chain":"base"}'

# x402 v2 sends the challenge base64-encoded in the PAYMENT-REQUIRED header (v1 sends it in the body).
# To read the header:
curl -sS -g -o /dev/null -D - -X POST 'https://draconic21-x402-api.onrender.com/v1/gas_price' \
  -H 'content-type: application/json' \
  --data-raw '{"chain":"base"}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// npm i @x402/fetch @x402/evm viem
import { wrapFetchWithPayment, x402Client } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";
import { privateKeyToAccount } from "viem/accounts";

// Pays at most $0.002 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.002" });
registerExactEvmScheme(client, { signer: privateKeyToAccount(process.env.EVM_PRIVATE_KEY) });
const pay = wrapFetchWithPayment(fetch, client);

// Not sure it's safe to pay? ToolVet checks it first for $0.005. Pay for that from a separate
// client: this one is capped at $0.002 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fdraconic21-x402-api.onrender.com%2Fv1%2Fgas_price&method=POST
const res = await pay("https://draconic21-x402-api.onrender.com/v1/gas_price", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "chain": "base"
  }),
});
console.log(res.status, await res.text());
Python: pay and call
# pip install "x402[requests,evm]"
import os
from eth_account import Account
from x402 import x402ClientSync
from x402.http.clients import x402_requests
from x402.mechanisms.evm import EthAccountSigner
from x402.mechanisms.evm.exact.register import register_exact_evm_client

# Pays at most $0.002 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.002"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://draconic21-x402-api.onrender.com/v1/gas_price",
        json={
            "chain": "base",
        },
    )
    print(res.status_code, res.text)

Security scan

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

Recent checks

WhenResultHTTPTimePrice
4 h agoPassed402245 ms$0.002
8 h agoPassed402299 ms$0.002
12 h agoPassed402647 ms$0.002
16 h agoPassed402716 ms$0.002
20 h agoPassed402230 ms$0.002
24 h agoPassed402234 ms$0.002
27 h agoPassed402702 ms$0.002
31 h agoPassed402611 ms$0.002
35 h agoPassed402605 ms$0.002
38 h agoPassed402251 ms$0.002
42 h agoPassed4021.9 s$0.002
45 h agoPassed402587 ms$0.002
2 days agoPassed402609 ms$0.002
2 days agoPassed402272 ms$0.002
2 days agoPassed402639 ms$0.002