ToolVet
80trust / 100

Chain Portfolio

by Tanod chainpeek in Onchain & crypto

x402 APIPassing, checked 28 min ago

chainpeek (Tanod) portfolio read: the native balance and up to 20 ERC-20 balances of an address on Ethereum or Base in one call. Read-only. On-chain strings are attacker-controlled.

POST https://tanod.dev/v1/chain/portfolio

Last 30 days

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Status and outage history · Atom feed

Uptime
100%
Response time
277 ms typical, 814 ms slowest 5%
Last check
28 min ago
Next check
in 1 min

How to call it

POST https://tanod.dev/v1/chain/portfolio

Each call costs $0.004 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://tanod.dev/v1/chain/portfolio
content-type: application/json

{
  "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
  "chain": "base",
  "tokens": [
    "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
  ]
}

Parameters

ParameterTypeRequiredDescription
addressstringYesAccount address (0x + 40 hex).
chainstringYesChain to read. One of: ethereum, base.
tokensarray of stringNoUp to 20 ERC-20 contract addresses (0x + 40 hex); empty for the native balance only.

Example response

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

{
  "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
  "block": 52290472,
  "chain": "base",
  "native": {
    "formatted": "3.12882180347253728",
    "symbol": "ETH",
    "wei": "3128821803472537280"
  },
  "symbols_note": null,
  "tokens": [
    {
      "decimals": 6,
      "error": null,
      "formatted": "44.633666",
      "ok": true,
      "raw": "44633666",
      "symbol": "USDC",
      "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
    }
  ]
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.004.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://tanod.dev/v1/chain/portfolio' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045","chain":"base","tokens":["0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"]}'

# 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://tanod.dev/v1/chain/portfolio' \
  -H 'content-type: application/json' \
  --data-raw '{"address":"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045","chain":"base","tokens":["0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"]}' \
  | 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 $0.004 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.004" });
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 $0.004 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Ftanod.dev%2Fv1%2Fchain%2Fportfolio&method=POST
const res = await pay("https://tanod.dev/v1/chain/portfolio", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
    "chain": "base",
    "tokens": [
      "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
    ]
  }),
});
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 $0.004 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.004"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.post(
        "https://tanod.dev/v1/chain/portfolio",
        json={
            "address": "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045",
            "chain": "base",
            "tokens": [
                "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
            ],
        },
    )
    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
28 min agoPassed402262 ms$0.004
5 h agoPassed402290 ms$0.004
9 h agoPassed402350 ms$0.004
13 h agoPassed402422 ms$0.004
17 h agoPassed402275 ms$0.004
20 h agoPassed402269 ms$0.004
24 h agoPassed402464 ms$0.004
28 h agoPassed402297 ms$0.004
32 h agoPassed402277 ms$0.004
35 h agoPassed402270 ms$0.004
39 h agoPassed402406 ms$0.004
42 h agoPassed402269 ms$0.004
46 h agoPassed402270 ms$0.004
2 days agoPassed402275 ms$0.004
2 days agoPassed402305 ms$0.004