ToolVet
77trust / 100

Address

by On-chain Wallet Balance (native) in Onchain & crypto

x402 APIPassing, checked 17 min ago

Native ETH / wallet balance for an address on any EVM chain: native balance (wei + ether), transaction count (nonce), and whether it's a contract or an externally-owned account (with deployed code size). Reads live on-chain data with automatic endpoint fallback.

POST
https://chain.openverbs.com/v1/address
Price
$0.002
per call in USDC
Uptime
100%
last 30 days
Response time
551 ms
704 ms slowest 5%
Last check
Passed
17 min ago, next in 12 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://chain.openverbs.com/v1/address

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.

POST https://chain.openverbs.com/v1/address
content-type: application/json

{
  "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "chain": "base"
}

Parameters

ParameterTypeRequiredDescription
addressstringYes20-byte hex address.
chainstringNoEVM chain to query. One of: ethereum, base, arbitrum, optimism, polygon. Default "ethereum". One of: ethereum, base, arbitrum, optimism, polygon.

Example response

The listing has no example response.

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 -X POST 'https://chain.openverbs.com/v1/address' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","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://chain.openverbs.com/v1/address' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","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 $0.002 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%2Fchain.openverbs.com%2Fv1%2Faddress&method=POST
const res = await pay("https://chain.openverbs.com/v1/address", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "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 $0.002 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.post(
        "https://chain.openverbs.com/v1/address",
        json={
            "address": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
            "chain": "base",
        },
    )
    print(res.status_code, res.text)

Security scan

No findings

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Recent checks

WhenResultHTTPTimePrice
17 min agoPassed402498 ms$0.002
5 h agoPassed402547 ms$0.002
10 h agoPassed402554 ms$0.002
15 h agoPassed402650 ms$0.002
20 h agoPassed402578 ms$0.002
Show 10 older checks
25 h agoPassed402506 ms$0.002
29 h agoPassed402168 ms$0.002
34 h agoPassed402551 ms$0.002
38 h agoPassed402562 ms$0.002
43 h agoPassed402567 ms$0.002
46 h agoPassed402259 ms$0.002
2 days agoPassed402531 ms$0.002
2 days agoPassed402559 ms$0.002
2 days agoPassed402514 ms$0.002
3 days agoPassed402576 ms$0.002