ToolVet
78trust / 100

Onchain Balance

by dt0ur.online in Onchain & crypto

x402 APIPassing, checked 1 h ago

Wallet balance lookup for any address on base, ethereum, arbitrum, optimism, polygon, bsc: native coin plus ERC-20 token balances (USDC, USDT, WETH, DAI, cbBTC or any tokens you pass) with live USD prices and total portfolio value, in one call.

POST
https://dt0ur.online/api/onchain/balance
Price
$0.01
per call in USDC
Uptime
100%
last 30 days
Response time
343 ms
524 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 · Watch with other listings

How to call it

POST https://dt0ur.online/api/onchain/balance

Each call costs $0.01 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://dt0ur.online/api/onchain/balance
content-type: application/json

{
  "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
  "chain": "base"
}

Parameters

ParameterTypeRequiredDescription
addressstringYesWallet address (0x...)
chainstringNoEVM chain: base, ethereum, arbitrum, optimism, polygon, bsc (default base) One of: base, ethereum, arbitrum, optimism, polygon, bsc. Default: "base".
include_zerobooleanNoInclude zero balances for default tokens Default: false.
tokensarray of stringNoERC-20 contract addresses to check (default: well-known tokens on the chain)

Example response

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

{
  "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
  "chain": "base",
  "native": {
    "balance": 3.12877356138,
    "balance_raw": "3128773561381288341",
    "price_usd": 2752.08,
    "symbol": "ETH",
    "value_usd": 8610.63
  },
  "tokens": [
    {
      "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "balance": 43.286078,
      "balance_raw": "43286078",
      "decimals": 6,
      "price_usd": 0.9999,
      "symbol": "USDC",
      "value_usd": 43.28
    }
  ],
  "tokens_checked": "well-known defaults (pass `tokens` for others)",
  "total_value_usd": 9205.62
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.01.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://dt0ur.online/api/onchain/balance' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045","chain":"base"}'

# 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://dt0ur.online/api/onchain/balance' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045","chain":"base"}' \
  | 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 $0.01 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.01" });
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 $0.01 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fdt0ur.online%2Fapi%2Fonchain%2Fbalance&method=POST
const res = await pay("https://dt0ur.online/api/onchain/balance", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
    "chain": "base"
  }),
});
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 $0.01 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.01"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://dt0ur.online/api/onchain/balance",
        json={
            "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
            "chain": "base",
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

WhenResultHTTPTimePrice
1 h agoPassed402377 ms$0.01
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