ToolVet
79trust / 100

Pulse Gas

by md.fastdb.in in Onchain & crypto

x402 APIPassing, checked 8 min ago

Live gas on Ethereum, Base, Arbitrum, Optimism, Polygon — base fee, priority fee tiers, and USD transfer cost, straight from chain RPC.

POST
https://md.fastdb.in/pulse/gas
Price
$0.001
per call in USDC
Uptime
96.8%
last 30 days
Response time
166 ms
237 ms slowest 5%
Last check
Passed
8 min ago, next in 23 min

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://md.fastdb.in/pulse/gas

Each call costs $0.001 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://md.fastdb.in/pulse/gas
content-type: application/json

{
  "chains": [
    "base",
    "ethereum"
  ]
}

Example response

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

{
  "at": "2026-07-17T15:00:00.000Z",
  "chains": [
    "base"
  ],
  "gas": {
    "base": {
      "baseFeeGwei": 0.005,
      "blockNumber": 48755195,
      "chain": "base",
      "gasPriceGwei": 0.006,
      "nativeSymbol": "ETH",
      "nativeUsd": 1818.32,
      "priorityFee": {
        "fastGwei": 0.019,
        "slowGwei": 0.0001,
        "standardGwei": 0.0011
      },
      "transferCostUsd": 0.0002291
    }
  }
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.001.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://md.fastdb.in/pulse/gas' \
  -H 'content-type: application/json' \
  --data-raw '{"chains":["base","ethereum"]}'

# 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://md.fastdb.in/pulse/gas' \
  -H 'content-type: application/json' \
  --data-raw '{"chains":["base","ethereum"]}' \
  | 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 $0.001 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.001" });
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 $0.001 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fmd.fastdb.in%2Fpulse%2Fgas&method=POST
const res = await pay("https://md.fastdb.in/pulse/gas", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "chains": [
      "base",
      "ethereum"
    ]
  }),
});
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 $0.001 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.001"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://md.fastdb.in/pulse/gas",
        json={
            "chains": [
                "base",
                "ethereum",
            ],
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

WhenResultHTTPTimePrice
8 min agoPassed40289 ms$0.001
5 h agoPassed402103 ms$0.001
9 h agoPassed402152 ms$0.001
14 h agoPassed402160 ms$0.001
18 h agoPassed402113 ms$0.001
Show 10 older checks
22 h agoPassed402168 ms$0.001
26 h agoPassed402177 ms$0.001
31 h agoPassed402188 ms$0.001
35 h agoPassed402134 ms$0.001
39 h agoPassed402142 ms$0.001
43 h agoPassed402166 ms$0.001
2 days agoPassed402235 ms$0.001
2 days agoPassed402156 ms$0.001
2 days agoPassed402137 ms$0.001
2 days agoPassed402184 ms$0.001