ToolVet
15trust / 100

Portfolio Valuation

by Vextorium in Onchain & crypto

x402 APIFailing, checked 4 h ago

Value a crypto portfolio such as {"BTC": 0.1, "ETH": 2}: current value and weight of each holding and total; with a start date, its value then, return, annualized volatility and maximum drawdown. Prices from DefiLlama.

POST
https://api.vextorium.com/v1/portfolio-valuation
Price
$0.005
per call in USDC
Uptime
0.0%
last 30 days
Response time
-
no timed checks yet
Last check
Failed
4 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Latest check failed 4 h ago: Amount "0.005" is not in atomic token units

Status and outage history · Atom feed · Watch with other listings

How to call it

POST https://api.vextorium.com/v1/portfolio-valuation

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://api.vextorium.com/v1/portfolio-valuation
content-type: application/json

{
  "positions": {
    "BTC": 0.1,
    "ETH": 2
  },
  "since": "2026-01-01"
}

Parameters

ParameterTypeRequiredDescription
positionsobjectYesAsset -> quantity (up to 20)
sincestringNoStart date for performance (optional)

Example response

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

Example response, 27 lines
{
  "historical": {
    "annual_volatility_pct": 47.35,
    "initial_value_usd": 14747.05,
    "max_drop_pct": -45.41,
    "return_pct": -5.27,
    "since": "2026-01-01"
  },
  "positions": [
    {
      "amount": 0.1,
      "asset": "BTC",
      "price": 85593.85189565028,
      "value_usd": 8559.39,
      "weight_pct": 61.27
    },
    {
      "amount": 2,
      "asset": "ETH",
      "price": 2705.5148904133916,
      "value_usd": 5411.03,
      "weight_pct": 38.73
    }
  ],
  "source": "DefiLlama aggregated prices",
  "total_value_usd": 13970.41
}

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://api.vextorium.com/v1/portfolio-valuation' \
  -H 'content-type: application/json' \
  --data-raw '{"positions":{"BTC":0.1,"ETH":2},"since":"2026-01-01"}'

# 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://api.vextorium.com/v1/portfolio-valuation' \
  -H 'content-type: application/json' \
  --data-raw '{"positions":{"BTC":0.1,"ETH":2},"since":"2026-01-01"}' \
  | 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%2Fapi.vextorium.com%2Fv1%2Fportfolio-valuation&method=POST
const res = await pay("https://api.vextorium.com/v1/portfolio-valuation", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "positions": {
      "BTC": 0.1,
      "ETH": 2
    },
    "since": "2026-01-01"
  }),
});
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://api.vextorium.com/v1/portfolio-valuation",
        json={
            "positions": {
                "BTC": 0.1,
                "ETH": 2,
            },
            "since": "2026-01-01",
        },
    )
    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
4 h agoAmount "0.005" is not in atomic token units402115 ms$0.005
9 h agoAmount "0.005" is not in atomic token units402107 ms$0.005
14 h agoAmount "0.005" is not in atomic token units40298 ms$0.005
19 h agoAmount "0.005" is not in atomic token units402125 ms$0.005
24 h agoAmount "0.005" is not in atomic token units402126 ms$0.005
Show 10 older checks
28 h agoAmount "0.005" is not in atomic token units402153 ms$0.005
33 h agoAmount "0.005" is not in atomic token units40290 ms$0.005
38 h agoAmount "0.005" is not in atomic token units40296 ms$0.005
43 h agoAmount "0.005" is not in atomic token units40291 ms$0.005
47 h agoAmount "0.005" is not in atomic token units402153 ms$0.005
2 days agoAmount "0.005" is not in atomic token units40283 ms$0.005
2 days agoAmount "0.005" is not in atomic token units402153 ms$0.005
3 days agoAmount "0.005" is not in atomic token units40288 ms$0.005
3 days agoAmount "0.005" is not in atomic token units40288 ms$0.005
3 days agoAmount "0.005" is not in atomic token units402153 ms$0.005