ToolVet
72trust / 100

Token Balance

by Token Balance in Onchain & crypto

x402 APIPassing, checked 8 h ago

🆕 An ERC-20 balance on Base, in raw units and in decimals, with the token's symbol and decimals resolved in the same call. Zero is flagged explicitly, since it is the commonest answer and the one most easily confused with a failed read. An address that doesn't implement balanceOf answers found:false and says so.

GET
https://402.com.tr/api/x402/token-balance
Price
$0.002
per call in USDC
Uptime
100%
last 30 days
Response time
467 ms
580 ms slowest 5%
Last check
Passed
8 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/token-balance

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.

GET https://402.com.tr/api/x402/token-balance?token=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&wallet=0x973a31858f4d2125f48c880542da11a2796f12d6

Parameters

ParameterTypeRequiredDescription
tokenstringYesToken contract
walletstringYesWallet address

Example response

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

{
  "chain": "base",
  "checkedAt": "2026-10-08T08:48:18.741Z",
  "decimals": 6,
  "decimalsAssumed": false,
  "found": true,
  "symbol": "USDC",
  "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "wallet": "0x973A31858f4D2125f48C880542DA11a2796f12D6"
}

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 'https://402.com.tr/api/x402/token-balance?token=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&wallet=0x973a31858f4d2125f48c880542da11a2796f12d6'

# 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/token-balance?token=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&wallet=0x973a31858f4d2125f48c880542da11a2796f12d6' \
  | 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%2F402.com.tr%2Fapi%2Fx402%2Ftoken-balance
const res = await pay("https://402.com.tr/api/x402/token-balance?token=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&wallet=0x973a31858f4d2125f48c880542da11a2796f12d6");
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.get("https://402.com.tr/api/x402/token-balance?token=0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913&wallet=0x973a31858f4d2125f48c880542da11a2796f12d6")
    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
8 h agoPassed402521 ms$0.002
19 h agoPassed402366 ms$0.002
28 h agoPassed402455 ms$0.002
39 h agoPassed402572 ms$0.002
43 h agoPassed402650 ms$0.002
Show 10 older checks
47 h agoPassed402421 ms$0.002
2 days agoPassed402474 ms$0.002
2 days agoPassed402522 ms$0.002
3 days agoPassed402481 ms$0.002
3 days agoPassed402457 ms$0.002
3 days agoPassed402453 ms$0.002
3 days agoPassed402447 ms$0.002
3 days agoPassed402445 ms$0.002
3 days agoPassed402440 ms$0.002
4 days agoPassed402528 ms$0.002