ToolVet
72trust / 100

Wallet Lookup

by call402.com in Onchain & crypto

x402 APIPassing, checked 7 min ago

Look up a Base wallet address: native ETH plus balances for a curated list of 195 tokens, read directly from Base chain state via public RPC with a self-hosted reader (no third-party data API). The response includes a coverage field: tokens outside the list with no transfers in the discovery window (default about 28 hours) are not reported. Balances only; no USD valuation.

POST
https://call402.com/api/wallet-lookup
Price
$0.005
per call in USDC
Uptime
97.4%
last 30 days
Response time
839 ms
1.5 s slowest 5%
Last check
Passed
7 min ago, next in 21 min

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://call402.com/api/wallet-lookup

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://call402.com/api/wallet-lookup
content-type: application/json

{
  "address": "0x2e34a510c818f18dc5385e950e84e69f36704dd2"
}

Parameters

ParameterTypeRequiredDescription
addressstringYesBase wallet address, required (0x + 40 hex chars)
windowintegerNoOptional discovery window in blocks, 1000-200000 (default 50000, about 28 hours)

Example response

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

{
  "address": "0x2e34a510c818f18dc5385e950e84e69f36704dd2",
  "block_number": 53281603,
  "coverage": {
    "checked": 195,
    "discovery_batches_failed": 0,
    "discovery_contracts_scanned": 160,
    "discovery_watchlist_size": 80,
    "token_list_size": 195
  },
  "elapsed_ms": 3182,
  "native": {
    "balance": "0.004946486470660966",
    "balance_raw": "4946486470660966",
    "decimals": 18,
    "symbol": "ETH"
  },
  "tokens": []
}

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://call402.com/api/wallet-lookup' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"0x2e34a510c818f18dc5385e950e84e69f36704dd2"}'

# 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://call402.com/api/wallet-lookup' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"0x2e34a510c818f18dc5385e950e84e69f36704dd2"}' \
  | 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%2Fcall402.com%2Fapi%2Fwallet-lookup&method=POST
const res = await pay("https://call402.com/api/wallet-lookup", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "address": "0x2e34a510c818f18dc5385e950e84e69f36704dd2"
  }),
});
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://call402.com/api/wallet-lookup",
        json={
            "address": "0x2e34a510c818f18dc5385e950e84e69f36704dd2",
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

WhenResultHTTPTimePrice
7 min agoPassed402767 ms$0.005
6 h agoPassed402721 ms$0.005
12 h agoPassed402700 ms$0.005
18 h agoPassed402823 ms$0.005
24 h agoPassed402733 ms$0.005
Show 10 older checks
29 h agoPassed402723 ms$0.005
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2 days agoPassed402757 ms$0.005
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3 days agoPassed402752 ms$0.005