77trust / 100

Check Full

by Kertivo Shield (full) in Onchain & crypto

x402 APIPassing, checked 2 h ago

Full-history address-poisoning check before you send USDC on Base. Same risk/lookalike/seenBefore logic as /address/check, but funding history comes from ONE Blockscout index call (x402, up to the sender's 500 most recent Base USDC transfers; v2 page fallback) so coverage is usually the sender's full Base USDC history. Body {from, to}. Not charged if the index is down. Cheap partial/RPC tier: POST /address/check ($0.001).

POST
https://paycheck.hectichustle.workers.dev/address/check/full
Price
$0.005
per call in USDC
Uptime
100%
last 30 days
Response time
584 ms
890 ms slowest 5%
Last check
Passed
2 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

POST https://paycheck.hectichustle.workers.dev/address/check/full

Each call costs $0.005 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://paycheck.hectichustle.workers.dev/address/check/full
content-type: application/json

{
  "from": "0xfc1e390266f3b29179b5d63a7937a689d1e5279a",
  "to": "0xccd53f97ddfdf6939028698803dfe20fac455d07"
}

Parameters

ParameterTypeRequiredDescription
contactsarray of stringNoOptional: up to 50 addresses you already trust (address book). 'to' is compared offline against them, so a lookalike of a contact is flagged even outside the scanned history.
fromstringYesSender address
tostringYesIntended recipient

Example response

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

Example response, 40 lines
{
  "coverage": {
    "complete": true,
    "counterparties": 10,
    "coveragePct": 100,
    "historyComplete": true,
    "indexer": "blockscout x402 (paid page)",
    "indexerPages": 1,
    "lowCoverage": false,
    "rpcCalls": 1,
    "scannedFrom": 0,
    "scannedTo": 52410000,
    "source": "blockscout",
    "transfersSeen": 12,
    "windowBlocks": 52410000,
    "windowFrom": 0,
    "windowTo": 52410000
  },
  "from": "0xfc1e390266f3b29179b5d63a7937a689d1e5279a",
  "lookalikes": [
    {
      "address": "0xccd560c57ca850ec6465008fdbc55d3b32b75d07",
      "dustTransfers": 1,
      "inbound": 0,
      "lastBlock": 52377228,
      "outbound": 1,
      "pattern": "dust_or_zero_value",
      "realOut": 0,
      "sampleTx": "0xf34c5e5ecd6a10e63133633f3d0108019f2667bd6c0557390e01dd6c8ca4ddd4"
    }
  ],
  "mode": "live_paid_full",
  "priceCharged": "0.005 USDC",
  "reasons": [
    "you have paid 'to' before, but 1 lookalike(s) also appear (poisoning attempt): keep using the full address you verified"
  ],
  "risk": "medium",
  "seenBefore": true,
  "to": "0xccd53f97ddfdf6939028698803dfe20fac455d07"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.005.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://paycheck.hectichustle.workers.dev/address/check/full' \
  -H 'content-type: application/json' \
  --data-raw '{"from":"0xfc1e390266f3b29179b5d63a7937a689d1e5279a","to":"0xccd53f97ddfdf6939028698803dfe20fac455d07"}'

# 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://paycheck.hectichustle.workers.dev/address/check/full' \
  -H 'content-type: application/json' \
  --data-raw '{"from":"0xfc1e390266f3b29179b5d63a7937a689d1e5279a","to":"0xccd53f97ddfdf6939028698803dfe20fac455d07"}' \
  | 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 $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
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 $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fpaycheck.hectichustle.workers.dev%2Faddress%2Fcheck%2Ffull&method=POST
const res = await pay("https://paycheck.hectichustle.workers.dev/address/check/full", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "from": "0xfc1e390266f3b29179b5d63a7937a689d1e5279a",
    "to": "0xccd53f97ddfdf6939028698803dfe20fac455d07"
  }),
});
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 $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://paycheck.hectichustle.workers.dev/address/check/full",
        json={
            "from": "0xfc1e390266f3b29179b5d63a7937a689d1e5279a",
            "to": "0xccd53f97ddfdf6939028698803dfe20fac455d07",
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

WhenResultHTTPTimePrice
2 h agoPassed402535 ms$0.005
7 h agoPassed402447 ms$0.005
12 h agoPassed402584 ms$0.005
17 h agoPassed402456 ms$0.005
22 h agoPassed402771 ms$0.005
Show 10 older checks
26 h agoPassed402740 ms$0.005
31 h agoPassed402752 ms$0.005
36 h agoPassed402758 ms$0.005
40 h agoPassed402402 ms$0.005
44 h agoPassed402694 ms$0.005
2 days agoPassed402611 ms$0.005
2 days agoPassed402557 ms$0.005
2 days agoPassed402659 ms$0.005
3 days agoPassed402577 ms$0.005
3 days agoPassed402706 ms$0.005