71trust / 100

Calc Vocal Penn

x402 APIPassing, checked 3 h ago

Mahmud 2021 VOCAL-Penn 30-day postoperative mortality logistic for cirrhosis. log_odds = -5.472096 + 1.061725*ASA + 0.927904*emergency + surgery dummies (laparoscopic abdominal reference) + Stata 3-knot RCS albumin (2.7, 3.7, 4.4) and platelets (75, 152, 271) + 0.1448936*bilirubin - 0.7541669*obesity + 0.8268748*NAFLD. Percent to 1 decimal. Not a surgical order. magent does not assign ASA or read labs.

POST

https://api.magentlab.com/api/calc/vocal_penn

Price: $0.007; per call in USDC
Uptime: 100%; last 30 days
Response time: 158 ms; 637 ms slowest 5%
Last check: Passed; 3 h ago, next any minute now

Run a free test call How to call it

Reliability

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

How to call it

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

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/vocal_penn
content-type: application/json

{
  "items": [
    {
      "age": 60,
      "albumin_g_dl": 3.5,
      "albumin_g_l": 35,
      "asa_class": 3,
      "bilirubin_mg_dl": 1.2,
      "bilirubin_umol_l": 20.52,
      "emergency": false,
      "fatty_liver_disease": false,
      "obesity": false,
      "platelets_10e9_l": 150,
      "surgery_category": "abdominal_wall"
    },
    {
      "age": 60,
      "albumin_g_dl": 3.5,
      "albumin_g_l": 35,
      "asa_class": 3,
      "bilirubin_mg_dl": 1.2,
      "bilirubin_umol_l": 20.52,
      "emergency": false,
      "fatty_liver_disease": false,
      "obesity": false,
      "platelets_10e9_l": 150,
      "surgery_category": "abdominal_wall"
    }
  ]
}

Parameters

Parameter	Type	Required	Description
`items`	array of object	Yes

Example response

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

Example response, 54 lines

{
  "count": 2,
  "items": [
    {
      "age_years": 60,
      "albumin_g_dl": 3.5,
      "asa_class": 3,
      "bilirubin_mg_dl": 1.2,
      "citation": {
        "authors": "Mahmud N, Fricker Z, Hubbard RA, Ioannou GN, Lewis JD, Taddei TH, Rothstein KD, Serper M, Goldberg DS, Kaplan DE",
        "doi": "10.1002/hep.31558",
        "id": "mahmud-2021-vocal-penn",
        "pmid": "32939786",
        "source": "Hepatology. 2021;73(1):204-218",
        "title": "Risk Prediction Models for Post-Operative Mortality in Patients With Cirrhosis"
      },
      "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.",
      "emergency": false,
      "fatty_liver_disease": false,
      "formula": "mahmud_vocal_penn_30d_2021",
      "formula_expression": "log_odds = -5.472096 + 1.061725*ASA + 0.927904*emergency + 1.56071*abdominal_open + 0.7418021*abdominal_wall + 0.9165415*vascular + 1.464183*orthopedic + 1.893621*chest_cardiac - 0.0075185*platelets_sp1 + 0.0036657*platelets_sp2 - 0.5181509*albumin_sp1 - 1.000672*albumin_sp2 + 0.1448936*bilirubin_mg_dl - 0.7541669*obesity + 0.8268748*NAFLD; laparoscopic abdominal is the surgery reference; sp1 = x; sp2 = Stata mkspline 3-knot restricted cubic spline / (k3-k1)^2; albumin knots 2.7, 3.7, 4.4 g/dL; platelets knots 75, 152, 271 x10^9/L; mortality_30d_percent = 100*exp(log_odds)/(1+exp(log_odds)), 1 decimal",
      "logit": -4.4496,
      "mortality_30d_percent": 1.2,
      "obesity": false,
      "platelets_10e9_l": 150,
      "surgery_category": "abdominal_wall"
    },
    {
      "age_years": 60,
      "albumin_g_dl": 3.5,
      "asa_class": 3,
      "bilirubin_mg_dl": 1.2,
      "citation": {
        "authors": "Mahmud N, Fricker Z, Hubbard RA, Ioannou GN, Lewis JD, Taddei TH, Rothstein KD, Serper M, Goldberg DS, Kaplan DE",
        "doi": "10.1002/hep.31558",
        "id": "mahmud-2021-vocal-penn",
        "pmid": "32939786",
        "source": "Hepatology. 2021;73(1):204-218",
        "title": "Risk Prediction Models for Post-Operative Mortality in Patients With Cirrhosis"
      },
      "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.",
      "emergency": false,
      "fatty_liver_disease": false,
      "formula": "mahmud_vocal_penn_30d_2021",
      "formula_expression": "log_odds = -5.472096 + 1.061725*ASA + 0.927904*emergency + 1.56071*abdominal_open + 0.7418021*abdominal_wall + 0.9165415*vascular + 1.464183*orthopedic + 1.893621*chest_cardiac - 0.0075185*platelets_sp1 + 0.0036657*platelets_sp2 - 0.5181509*albumin_sp1 - 1.000672*albumin_sp2 + 0.1448936*bilirubin_mg_dl - 0.7541669*obesity + 0.8268748*NAFLD; laparoscopic abdominal is the surgery reference; sp1 = x; sp2 = Stata mkspline 3-knot restricted cubic spline / (k3-k1)^2; albumin knots 2.7, 3.7, 4.4 g/dL; platelets knots 75, 152, 271 x10^9/L; mortality_30d_percent = 100*exp(log_odds)/(1+exp(log_odds)), 1 decimal",
      "logit": -4.4496,
      "mortality_30d_percent": 1.2,
      "obesity": false,
      "platelets_10e9_l": 150,
      "surgery_category": "abdominal_wall"
    }
  ],
  "path": "/api/calc/vocal_penn"
}

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/vocal_penn' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"age":60,"albumin_g_dl":3.5,"albumin_g_l":35,"asa_class":3,"bilirubin_mg_dl":1.2,"bilirubin_umol_l":20.52,"emergency":false,"fatty_liver_disease":false,"obesity":false,"platelets_10e9_l":150,"surgery_category":"abdominal_wall"},{"age":60,"albumin_g_dl":3.5,"albumin_g_l":35,"asa_class":3,"bilirubin_mg_dl":1.2,"bilirubin_umol_l":20.52,"emergency":false,"fatty_liver_disease":false,"obesity":false,"platelets_10e9_l":150,"surgery_category":"abdominal_wall"}]}'

# 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/vocal_penn' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"age":60,"albumin_g_dl":3.5,"albumin_g_l":35,"asa_class":3,"bilirubin_mg_dl":1.2,"bilirubin_umol_l":20.52,"emergency":false,"fatty_liver_disease":false,"obesity":false,"platelets_10e9_l":150,"surgery_category":"abdominal_wall"},{"age":60,"albumin_g_dl":3.5,"albumin_g_l":35,"asa_class":3,"bilirubin_mg_dl":1.2,"bilirubin_umol_l":20.52,"emergency":false,"fatty_liver_disease":false,"obesity":false,"platelets_10e9_l":150,"surgery_category":"abdominal_wall"}]}' \
  | 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%2Fvocal_penn&method=POST
const res = await pay("https://api.magentlab.com/api/calc/vocal_penn", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "age": 60,
        "albumin_g_dl": 3.5,
        "albumin_g_l": 35,
        "asa_class": 3,
        "bilirubin_mg_dl": 1.2,
        "bilirubin_umol_l": 20.52,
        "emergency": false,
        "fatty_liver_disease": false,
        "obesity": false,
        "platelets_10e9_l": 150,
        "surgery_category": "abdominal_wall"
      },
      {
        "age": 60,
        "albumin_g_dl": 3.5,
        "albumin_g_l": 35,
        "asa_class": 3,
        "bilirubin_mg_dl": 1.2,
        "bilirubin_umol_l": 20.52,
        "emergency": false,
        "fatty_liver_disease": false,
        "obesity": false,
        "platelets_10e9_l": 150,
        "surgery_category": "abdominal_wall"
      }
    ]
  }),
});
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/vocal_penn",
        json={
            "items": [
                {
                    "age": 60,
                    "albumin_g_dl": 3.5,
                    "albumin_g_l": 35,
                    "asa_class": 3,
                    "bilirubin_mg_dl": 1.2,
                    "bilirubin_umol_l": 20.52,
                    "emergency": False,
                    "fatty_liver_disease": False,
                    "obesity": False,
                    "platelets_10e9_l": 150,
                    "surgery_category": "abdominal_wall",
                },
                {
                    "age": 60,
                    "albumin_g_dl": 3.5,
                    "albumin_g_l": 35,
                    "asa_class": 3,
                    "bilirubin_mg_dl": 1.2,
                    "bilirubin_umol_l": 20.52,
                    "emergency": False,
                    "fatty_liver_disease": False,
                    "obesity": False,
                    "platelets_10e9_l": 150,
                    "surgery_category": "abdominal_wall",
                },
            ],
        },
    )
    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

When	Result	HTTP	Time	Price
3 h ago	Passed	402	156 ms	$0.007
8 h ago	Passed	402	158 ms	$0.007
12 h ago	Passed	402	248 ms	$0.007
17 h ago	Passed	402	1.3 s	$0.007
22 h ago	Passed	402	155 ms	$0.007

Show 10 older checks

26 h ago	Passed	402	337 ms	$0.007
30 h ago	Passed	402	180 ms	$0.007
34 h ago	Passed	402	137 ms	$0.007
38 h ago	Passed	402	162 ms	$0.007
43 h ago	Passed	402	144 ms	$0.007
47 h ago	Passed	402	286 ms	$0.007
2 days ago	Passed	402	150 ms	$0.007
2 days ago	Passed	402	152 ms	$0.007
3 days ago	Passed	402	164 ms	$0.007
3 days ago	Passed	402	148 ms	$0.007

History

11 Oct 2026	Price changed from $0.005 to $0.007

Trust score 71/ 100

Availability (30-day uptime)		30 / 30
Valid x402 challenge		15 / 15
Response time		10 / 10
Real paying agents (30 days)		6 / 15
Charges what it lists		0 / 10
Security scan		10 / 10
Verified owner		0 / 10

How the score works

Payment terms

Price: $0.007 per call
Listed at: $0.005 (charges more)
Token: USDC
Networks: Base
Pays to: 0x836B…9Ee2

Real usage

Paying agents: 3 in 30 days
Paid calls: 6 in 30 days
Last paid call: 4 days ago

Source: x402 Bazaar settlement data.

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Trust score

[![ToolVet trust score](https://toolvet.app/badge/calc-vocal-penn.svg)](https://toolvet.app/s/calc-vocal-penn)