ToolVet
78trust / 100

Paymaster Check

by Paymaster Check in Onchain & crypto

x402 APIPassing, checked 3 h ago

🆕 Given a paymaster address, audits whether it's a healthy, active gas sponsor. Reads its UserOperationEvents across both EntryPoints: sponsored op volume, distinct accounts served, success rate, total gas sponsored, and concentration (the share coming from its single busiest app). The read to run before integrating a paymaster (Coinbase / Pimlico / Alchemy / custom), or judging who funds a counterparty's gas. paymaster= required, days= optional (default 30, max 90). Not financial advice.

GET
https://402.com.tr/api/x402/paymaster-check
Price
$0.05
per call in USDC
Uptime
100%
last 30 days
Response time
485 ms
647 ms slowest 5%
Last check
Passed
3 h ago, next any minute now

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

GET https://402.com.tr/api/x402/paymaster-check

Each call costs $0.05 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.

GET https://402.com.tr/api/x402/paymaster-check?days=7&paymaster=0x2cc0c7981D846b9F2a16276556f6e8cb52BfB633

Parameters

ParameterTypeRequiredDescription
daysstringNoLookback days (optional)
paymasterstringYesPaymaster address

Example response

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

{
  "checkedAt": "2026-10-11T17:26:27.592Z",
  "known": false,
  "label": null,
  "nativeAaLive": false,
  "paymaster": "0x2cc0c7981D846b9F2a16276556f6e8cb52BfB633",
  "sponsoredOps": 131547,
  "verdict": "healthy_active",
  "windowDays": 7
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.05.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://402.com.tr/api/x402/paymaster-check?days=7&paymaster=0x2cc0c7981D846b9F2a16276556f6e8cb52BfB633'

# 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 - 'https://402.com.tr/api/x402/paymaster-check?days=7&paymaster=0x2cc0c7981D846b9F2a16276556f6e8cb52BfB633' \
  | 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 $0.05 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.05" });
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 $0.05 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2F402.com.tr%2Fapi%2Fx402%2Fpaymaster-check
const res = await pay("https://402.com.tr/api/x402/paymaster-check?days=7&paymaster=0x2cc0c7981D846b9F2a16276556f6e8cb52BfB633");
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 $0.05 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.05"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://402.com.tr/api/x402/paymaster-check?days=7&paymaster=0x2cc0c7981D846b9F2a16276556f6e8cb52BfB633")
    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
3 h agoPassed402505 ms$0.05
8 h agoPassed402485 ms$0.05
13 h agoPassed402519 ms$0.05
17 h agoPassed402509 ms$0.05
21 h agoPassed402563 ms$0.05
Show 10 older checks
25 h agoPassed402494 ms$0.05
30 h agoPassed402524 ms$0.05
34 h agoPassed402619 ms$0.05
38 h agoPassed402471 ms$0.05
43 h agoPassed402491 ms$0.05
47 h agoPassed402647 ms$0.05
2 days agoPassed402493 ms$0.05
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2 days agoPassed402643 ms$0.05
3 days agoPassed402367 ms$0.05