ToolVet
69trust / 100

Calc Palchak

by magent in Security & trust

x402 APIFailing, checked 53 min ago

Palchak 2003. High risk after blunt head trauma in children 0-17 if any applicable predictor: abnormal mental status, clinical signs of skull fracture, history of vomiting, scalp hematoma (only if age <=2), or headache. Else low risk. ct_not_low_risk iff high. Scalp hematoma is parsed at all ages but scores only when age is 0, 1, or 2. Not PECARN, CATCH, CHALICE, Canadian CT Head, or NEXUS. magent does not examine the child or order CT. Not a diagnosis or medical device.

POST
https://api.magentlab.com/api/calc/palchak
Price
$0.007
per call in USDC
Uptime
97.0%
last 30 days
Response time
153 ms
401 ms slowest 5%
Last check
Failed
53 min ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Latest check failed 53 min ago: Timed out

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

How to call it

POST https://api.magentlab.com/api/calc/palchak

Each call costs $0.007 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.magentlab.com/api/calc/palchak
content-type: application/json

{
  "items": [
    {
      "abnormal_mental_status": false,
      "age": 10,
      "clinical_signs_skull_fracture": false,
      "headache": false,
      "history_of_vomiting": false,
      "scalp_hematoma": false
    },
    {
      "abnormal_mental_status": false,
      "age": 10,
      "clinical_signs_skull_fracture": false,
      "headache": false,
      "history_of_vomiting": false,
      "scalp_hematoma": false
    }
  ]
}

Parameters

ParameterTypeRequiredDescription
itemsarray of objectYes

Example response

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

Example response, 84 lines
{
  "count": 2,
  "items": [
    {
      "age_years": 10,
      "citation": {
        "authors": "Palchak MJ, Holmes JF, Vance CW, et al.",
        "doi": "10.1067/S0196-0644(03)00425-6",
        "id": "palchak-2003",
        "pmid": "14520320",
        "source": "Ann Emerg Med. 2003;42(4):492-506",
        "title": "A decision rule for identifying children at low risk for brain injuries after blunt head trauma"
      },
      "criteria": [
        {
          "factor": "abnormal_mental_status",
          "met": false
        },
        {
          "factor": "clinical_signs_skull_fracture",
          "met": false
        },
        {
          "factor": "history_of_vomiting",
          "met": false
        },
        {
          "factor": "scalp_hematoma",
          "met": false
        },
        {
          "factor": "headache",
          "met": false
        }
      ],
      "ct_not_low_risk": false,
      "disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
      "formula": "palchak",
      "formula_expression": "high if any applicable predictor (abnormal_mental_status, clinical_signs_skull_fracture, history_of_vomiting, scalp_hematoma only if age <= 2, headache); else low; ct_not_low_risk iff high",
      "high_risk": false,
      "low_risk": true
    },
    {
      "age_years": 10,
      "citation": {
        "authors": "Palchak MJ, Holmes JF, Vance CW, et al.",
        "doi": "10.1067/S0196-0644(03)00425-6",
        "id": "palchak-2003",
        "pmid": "14520320",
        "source": "Ann Emerg Med. 2003;42(4):492-506",
        "title": "A decision rule for identifying children at low risk for brain injuries after blunt head trauma"
      },
      "criteria": [
        {
          "factor": "abnormal_mental_status",
          "met": false
        },
        {
          "factor": "clinical_signs_skull_fracture",
          "met": false
        },
        {
          "factor": "history_of_vomiting",
          "met": false
        },
        {
          "factor": "scalp_hematoma",
          "met": false
        },
        {
          "factor": "headache",
          "met": false
        }
      ],
      "ct_not_low_risk": false,
      "disclaimer": "Not a medical device. Deterministic published-formula or published-code output for autonomous agents. A licensed clinician remains responsible for patient care and billing submissions.",
      "formula": "palchak",
      "formula_expression": "high if any applicable predictor (abnormal_mental_status, clinical_signs_skull_fracture, history_of_vomiting, scalp_hematoma only if age <= 2, headache); else low; ct_not_low_risk iff high",
      "high_risk": false,
      "low_risk": true
    }
  ],
  "path": "/api/calc/palchak"
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.007.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.magentlab.com/api/calc/palchak' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"abnormal_mental_status":false,"age":10,"clinical_signs_skull_fracture":false,"headache":false,"history_of_vomiting":false,"scalp_hematoma":false},{"abnormal_mental_status":false,"age":10,"clinical_signs_skull_fracture":false,"headache":false,"history_of_vomiting":false,"scalp_hematoma":false}]}'

# 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.magentlab.com/api/calc/palchak' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"abnormal_mental_status":false,"age":10,"clinical_signs_skull_fracture":false,"headache":false,"history_of_vomiting":false,"scalp_hematoma":false},{"abnormal_mental_status":false,"age":10,"clinical_signs_skull_fracture":false,"headache":false,"history_of_vomiting":false,"scalp_hematoma":false}]}' \
  | 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 $0.007 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.007" });
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 $0.007 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.magentlab.com%2Fapi%2Fcalc%2Fpalchak&method=POST
const res = await pay("https://api.magentlab.com/api/calc/palchak", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "abnormal_mental_status": false,
        "age": 10,
        "clinical_signs_skull_fracture": false,
        "headache": false,
        "history_of_vomiting": false,
        "scalp_hematoma": false
      },
      {
        "abnormal_mental_status": false,
        "age": 10,
        "clinical_signs_skull_fracture": false,
        "headache": false,
        "history_of_vomiting": false,
        "scalp_hematoma": false
      }
    ]
  }),
});
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 $0.007 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.007"})
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.magentlab.com/api/calc/palchak",
        json={
            "items": [
                {
                    "abnormal_mental_status": False,
                    "age": 10,
                    "clinical_signs_skull_fracture": False,
                    "headache": False,
                    "history_of_vomiting": False,
                    "scalp_hematoma": False,
                },
                {
                    "abnormal_mental_status": False,
                    "age": 10,
                    "clinical_signs_skull_fracture": False,
                    "headache": False,
                    "history_of_vomiting": False,
                    "scalp_hematoma": False,
                },
            ],
        },
    )
    print(res.status_code, res.text)

Security scan

1 finding

  • Charges more than its listed price in payment
    Listed at $0.005, charges $0.007

Recent checks

WhenResultHTTPTimePrice
53 min agoTimed out---
6 h agoPassed402311 ms$0.007
11 h agoPassed402157 ms$0.007
15 h agoPassed402297 ms$0.007
20 h agoPassed402199 ms$0.007
Show 10 older checks
24 h agoPassed402145 ms$0.007
29 h agoPassed402152 ms$0.007
33 h agoPassed402233 ms$0.007
37 h agoPassed402228 ms$0.007
41 h agoPassed402142 ms$0.007
46 h agoPassed402150 ms$0.007
2 days agoPassed402151 ms$0.007
2 days agoPassed402143 ms$0.007
2 days agoPassed402142 ms$0.007
3 days agoPassed402164 ms$0.007

History

11 Oct 2026Price changed from $0.005 to $0.007