ToolVet
80trust / 100

Verify Wallet

by Limitguard in Onchain & crypto

x402 APIPassing, checked 1 h ago

MCP tool: Screen a wallet: OFAC SDN address match, on-chain signals (contract check, native and USDC balance, transaction count, first seen on Base) and named risk rules with up to 3 advice items. On Base, also reports any ERC-8004 agent the wallet owns and its open on-chain reputation as descriptive signals, never scored. Accepts EVM (0x...) and Solana (base58) addresses.

POST
https://api.limitguard.ai/v1/mcp/verify-wallet
Price
$0.005
per call in USDC
Uptime
100%
last 30 days
Response time
216 ms
777 ms slowest 5%
Last check
Passed
1 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

How to call it

POST https://api.limitguard.ai/v1/mcp/verify-wallet

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://api.limitguard.ai/v1/mcp/verify-wallet
content-type: application/json

{
  "wallet_address": "0x1234567890abcdef1234567890abcdef12345678"
}

Example response

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

{
  "advice": [
    {
      "action": "proceed with standard monitoring",
      "expected_result": "re-screen on material change",
      "why": "no OFAC SDN match as of 2026-09-23; no rule fired"
    }
  ],
  "risk_level": "low",
  "risk_score": 0,
  "rules_fired": [],
  "sanctions": {
    "as_of": "2026-09-23",
    "hit": false,
    "lists": [],
    "programs": [],
    "source": "ofac_sdn",
    "status": "ok"
  },
  "unavailable": []
}

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://api.limitguard.ai/v1/mcp/verify-wallet' \
  -H 'content-type: application/json' \
  --data-raw '{"wallet_address":"0x1234567890abcdef1234567890abcdef12345678"}'

# 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://api.limitguard.ai/v1/mcp/verify-wallet' \
  -H 'content-type: application/json' \
  --data-raw '{"wallet_address":"0x1234567890abcdef1234567890abcdef12345678"}' \
  | 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%2Fapi.limitguard.ai%2Fv1%2Fmcp%2Fverify-wallet&method=POST
const res = await pay("https://api.limitguard.ai/v1/mcp/verify-wallet", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "wallet_address": "0x1234567890abcdef1234567890abcdef12345678"
  }),
});
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://api.limitguard.ai/v1/mcp/verify-wallet",
        json={
            "wallet_address": "0x1234567890abcdef1234567890abcdef12345678",
        },
    )
    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
1 h agoPassed402419 ms$0.005
6 h agoPassed402265 ms$0.005
10 h agoPassed402216 ms$0.005
14 h agoPassed402169 ms$0.005
18 h agoPassed402237 ms$0.005
Show 10 older checks
23 h agoPassed402280 ms$0.005
27 h agoPassed402520 ms$0.005
31 h agoPassed402236 ms$0.005
34 h agoPassed402195 ms$0.11
38 h agoPassed402188 ms$0.11
42 h agoPassed402199 ms$0.11
46 h agoPassed4021.1 s$0.11
2 days agoPassed402203 ms$0.11
2 days agoPassed402293 ms$0.11
2 days agoPassed402191 ms$0.11

History

14 Oct 2026Price changed from $0.11 to $0.005