ToolVet
69trust / 100

Calc Kings College

by magent in Other

x402 APIFailing, checked 5 h ago

King's College criteria (O'Grady 1989) for poor prognosis in fulminant hepatic failure. Acetaminophen: arterial pH <7.30, or PT >100 s plus creatinine >300 umol/L plus grade III/IV encephalopathy. Non-acetaminophen: PT >100 s, or any 3 of age <11 or >40, unfavorable etiology (non-A non-B or drug reaction), jaundice-to-encephalopathy >7 days, bilirubin >300 umol/L, PT >50 s. PT seconds, not INR. Not a transplant listing order.

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

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

Latest check failed 5 h ago: Timed out

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

How to call it

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

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/kings_college
content-type: application/json

{
  "items": [
    {
      "age_years": 30,
      "arterial_ph": 7.4,
      "bilirubin_umol_l": 50,
      "creatinine_umol_l": 80,
      "encephalopathy_grade": 1,
      "etiology": "acetaminophen",
      "jaundice_to_encephalopathy_days": 2,
      "pt_sec": 20,
      "unfavorable_etiology": false
    },
    {
      "age_years": 30,
      "arterial_ph": 7.4,
      "bilirubin_umol_l": 50,
      "creatinine_umol_l": 80,
      "encephalopathy_grade": 1,
      "etiology": "acetaminophen",
      "jaundice_to_encephalopathy_days": 2,
      "pt_sec": 20,
      "unfavorable_etiology": false
    }
  ]
}

Parameters

ParameterTypeRequiredDescription
itemsarray of objectYes

Example response

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

Example response, 80 lines
{
  "count": 2,
  "items": [
    {
      "citation": {
        "authors": "O'Grady JG, Alexander GJ, Hayllar KM, Williams R",
        "doi": "10.1016/0016-5085(89)90081-4",
        "id": "ogrady-1989",
        "pmid": "2490426",
        "source": "Gastroenterology. 1989;97(2):439-445",
        "title": "Early indicators of prognosis in fulminant hepatic failure"
      },
      "criteria": [
        {
          "factor": "arterial_ph_lt_7_30",
          "met": false,
          "value": 7.4
        },
        {
          "factor": "pt_sec_gt_100",
          "met": false,
          "value": 20
        },
        {
          "factor": "creatinine_umol_l_gt_300",
          "met": false,
          "value": 80
        },
        {
          "factor": "encephalopathy_grade_ge_3",
          "met": false,
          "value": 1
        }
      ],
      "criteria_met": 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.",
      "etiology": "acetaminophen",
      "formula": "kings_college",
      "formula_expression": "acetaminophen: arterial_ph < 7.30, or (pt_sec > 100 and creatinine_umol_l > 300 and encephalopathy_grade >= 3); non_acetaminophen: pt_sec > 100, or at least 3 of (age_years < 11 or > 40; unfavorable_etiology; jaundice_to_encephalopathy_days > 7; bilirubin_umol_l > 300; pt_sec > 50)"
    },
    {
      "citation": {
        "authors": "O'Grady JG, Alexander GJ, Hayllar KM, Williams R",
        "doi": "10.1016/0016-5085(89)90081-4",
        "id": "ogrady-1989",
        "pmid": "2490426",
        "source": "Gastroenterology. 1989;97(2):439-445",
        "title": "Early indicators of prognosis in fulminant hepatic failure"
      },
      "criteria": [
        {
          "factor": "arterial_ph_lt_7_30",
          "met": false,
          "value": 7.4
        },
        {
          "factor": "pt_sec_gt_100",
          "met": false,
          "value": 20
        },
        {
          "factor": "creatinine_umol_l_gt_300",
          "met": false,
          "value": 80
        },
        {
          "factor": "encephalopathy_grade_ge_3",
          "met": false,
          "value": 1
        }
      ],
      "criteria_met": 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.",
      "etiology": "acetaminophen",
      "formula": "kings_college",
      "formula_expression": "acetaminophen: arterial_ph < 7.30, or (pt_sec > 100 and creatinine_umol_l > 300 and encephalopathy_grade >= 3); non_acetaminophen: pt_sec > 100, or at least 3 of (age_years < 11 or > 40; unfavorable_etiology; jaundice_to_encephalopathy_days > 7; bilirubin_umol_l > 300; pt_sec > 50)"
    }
  ],
  "path": "/api/calc/kings_college"
}

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/kings_college' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"age_years":30,"arterial_ph":7.4,"bilirubin_umol_l":50,"creatinine_umol_l":80,"encephalopathy_grade":1,"etiology":"acetaminophen","jaundice_to_encephalopathy_days":2,"pt_sec":20,"unfavorable_etiology":false},{"age_years":30,"arterial_ph":7.4,"bilirubin_umol_l":50,"creatinine_umol_l":80,"encephalopathy_grade":1,"etiology":"acetaminophen","jaundice_to_encephalopathy_days":2,"pt_sec":20,"unfavorable_etiology":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/kings_college' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"age_years":30,"arterial_ph":7.4,"bilirubin_umol_l":50,"creatinine_umol_l":80,"encephalopathy_grade":1,"etiology":"acetaminophen","jaundice_to_encephalopathy_days":2,"pt_sec":20,"unfavorable_etiology":false},{"age_years":30,"arterial_ph":7.4,"bilirubin_umol_l":50,"creatinine_umol_l":80,"encephalopathy_grade":1,"etiology":"acetaminophen","jaundice_to_encephalopathy_days":2,"pt_sec":20,"unfavorable_etiology":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%2Fkings_college&method=POST
const res = await pay("https://api.magentlab.com/api/calc/kings_college", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "age_years": 30,
        "arterial_ph": 7.4,
        "bilirubin_umol_l": 50,
        "creatinine_umol_l": 80,
        "encephalopathy_grade": 1,
        "etiology": "acetaminophen",
        "jaundice_to_encephalopathy_days": 2,
        "pt_sec": 20,
        "unfavorable_etiology": false
      },
      {
        "age_years": 30,
        "arterial_ph": 7.4,
        "bilirubin_umol_l": 50,
        "creatinine_umol_l": 80,
        "encephalopathy_grade": 1,
        "etiology": "acetaminophen",
        "jaundice_to_encephalopathy_days": 2,
        "pt_sec": 20,
        "unfavorable_etiology": 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/kings_college",
        json={
            "items": [
                {
                    "age_years": 30,
                    "arterial_ph": 7.4,
                    "bilirubin_umol_l": 50,
                    "creatinine_umol_l": 80,
                    "encephalopathy_grade": 1,
                    "etiology": "acetaminophen",
                    "jaundice_to_encephalopathy_days": 2,
                    "pt_sec": 20,
                    "unfavorable_etiology": False,
                },
                {
                    "age_years": 30,
                    "arterial_ph": 7.4,
                    "bilirubin_umol_l": 50,
                    "creatinine_umol_l": 80,
                    "encephalopathy_grade": 1,
                    "etiology": "acetaminophen",
                    "jaundice_to_encephalopathy_days": 2,
                    "pt_sec": 20,
                    "unfavorable_etiology": 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
5 h agoTimed out---
9 h agoPassed402344 ms$0.007
14 h agoPassed402343 ms$0.007
19 h agoPassed402316 ms$0.007
24 h agoPassed402172 ms$0.007
Show 10 older checks
28 h agoPassed402147 ms$0.007
33 h agoPassed402163 ms$0.007
37 h agoPassed402151 ms$0.007
41 h agoPassed402269 ms$0.007
45 h agoPassed402282 ms$0.007
2 days agoPassed402461 ms$0.007
2 days agoPassed402140 ms$0.007
2 days agoPassed402157 ms$0.007
3 days agoPassed402153 ms$0.007
3 days agoPassed402159 ms$0.007

History

11 Oct 2026Price changed from $0.005 to $0.007