ToolVet
69trust / 100

Calc Pons

by magent in Security & trust

x402 APIPassing, checked 4 h ago

Wischmeyer 2018 PONS: four caller-assigned yes/no flags (BMI <18.5 kg/m² if age ≤65 or <20 if age >65; weight loss >10% in 6 months; oral intake reduced >50% in the past week; preoperative albumin <3.0 g/dL), 1 point each, max 4. high_risk true iff score ≥1. Not a medical device, diet order, or malnutrition diagnosis. magent does not weigh the patient, compute BMI, or assay albumin. Not NRS-2002, NUTRIC, or MUST.

POST
https://api.magentlab.com/api/calc/pons
Price
$0.007
per call in USDC
Uptime
97.1%
last 30 days
Response time
245 ms
625 ms slowest 5%
Last check
Passed
4 h ago, next any minute now

Run a free test callHow to call it

Reliability

All checks passedSome failedAll failedNot checked

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

How to call it

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

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/pons
content-type: application/json

{
  "items": [
    {
      "albumin_lt_3_g_dl": false,
      "bmi_low": false,
      "oral_intake_reduced_gt_50pct_week": false,
      "weight_loss_gt_10pct_6mo": false
    },
    {
      "albumin_lt_3_g_dl": false,
      "bmi_low": false,
      "oral_intake_reduced_gt_50pct_week": false,
      "weight_loss_gt_10pct_6mo": false
    }
  ]
}

Parameters

ParameterTypeRequiredDescription
itemsarray of objectYes

Example response

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

Example response, 82 lines
{
  "count": 2,
  "items": [
    {
      "citation": {
        "authors": "Wischmeyer PE, Carli F, Evans DC, et al.",
        "doi": "10.1213/ANE.0000000000002743",
        "id": "wischmeyer-2018",
        "pmid": "29369092",
        "source": "Anesth Analg. 2018;126(6):1883-1895",
        "title": "American Society for Enhanced Recovery and Perioperative Quality Initiative Joint Consensus Statement on Nutrition Screening and Therapy Within a Surgical Enhanced Recovery Pathway"
      },
      "components": [
        {
          "factor": "bmi_low",
          "points": 0,
          "present": false
        },
        {
          "factor": "weight_loss_gt_10pct_6mo",
          "points": 0,
          "present": false
        },
        {
          "factor": "oral_intake_reduced_gt_50pct_week",
          "points": 0,
          "present": false
        },
        {
          "factor": "albumin_lt_3_g_dl",
          "points": 0,
          "present": 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": "pons",
      "formula_expression": "PONS = bmi_low + weight_loss_gt_10pct_6mo + oral_intake_reduced_gt_50pct_week + albumin_lt_3_g_dl; each 1 if true; max 4; high_risk iff score ≥ 1",
      "high_risk": false,
      "max_score": 4,
      "score": 0
    },
    {
      "citation": {
        "authors": "Wischmeyer PE, Carli F, Evans DC, et al.",
        "doi": "10.1213/ANE.0000000000002743",
        "id": "wischmeyer-2018",
        "pmid": "29369092",
        "source": "Anesth Analg. 2018;126(6):1883-1895",
        "title": "American Society for Enhanced Recovery and Perioperative Quality Initiative Joint Consensus Statement on Nutrition Screening and Therapy Within a Surgical Enhanced Recovery Pathway"
      },
      "components": [
        {
          "factor": "bmi_low",
          "points": 0,
          "present": false
        },
        {
          "factor": "weight_loss_gt_10pct_6mo",
          "points": 0,
          "present": false
        },
        {
          "factor": "oral_intake_reduced_gt_50pct_week",
          "points": 0,
          "present": false
        },
        {
          "factor": "albumin_lt_3_g_dl",
          "points": 0,
          "present": 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": "pons",
      "formula_expression": "PONS = bmi_low + weight_loss_gt_10pct_6mo + oral_intake_reduced_gt_50pct_week + albumin_lt_3_g_dl; each 1 if true; max 4; high_risk iff score ≥ 1",
      "high_risk": false,
      "max_score": 4,
      "score": 0
    }
  ],
  "path": "/api/calc/pons"
}

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/pons' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"albumin_lt_3_g_dl":false,"bmi_low":false,"oral_intake_reduced_gt_50pct_week":false,"weight_loss_gt_10pct_6mo":false},{"albumin_lt_3_g_dl":false,"bmi_low":false,"oral_intake_reduced_gt_50pct_week":false,"weight_loss_gt_10pct_6mo":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/pons' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"albumin_lt_3_g_dl":false,"bmi_low":false,"oral_intake_reduced_gt_50pct_week":false,"weight_loss_gt_10pct_6mo":false},{"albumin_lt_3_g_dl":false,"bmi_low":false,"oral_intake_reduced_gt_50pct_week":false,"weight_loss_gt_10pct_6mo":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%2Fpons&method=POST
const res = await pay("https://api.magentlab.com/api/calc/pons", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "albumin_lt_3_g_dl": false,
        "bmi_low": false,
        "oral_intake_reduced_gt_50pct_week": false,
        "weight_loss_gt_10pct_6mo": false
      },
      {
        "albumin_lt_3_g_dl": false,
        "bmi_low": false,
        "oral_intake_reduced_gt_50pct_week": false,
        "weight_loss_gt_10pct_6mo": 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/pons",
        json={
            "items": [
                {
                    "albumin_lt_3_g_dl": False,
                    "bmi_low": False,
                    "oral_intake_reduced_gt_50pct_week": False,
                    "weight_loss_gt_10pct_6mo": False,
                },
                {
                    "albumin_lt_3_g_dl": False,
                    "bmi_low": False,
                    "oral_intake_reduced_gt_50pct_week": False,
                    "weight_loss_gt_10pct_6mo": 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
4 h agoPassed402224 ms$0.007
9 h agoPassed402676 ms$0.007
13 h agoTimed out---
18 h agoPassed402141 ms$0.007
23 h agoPassed402267 ms$0.007
Show 10 older checks
27 h agoPassed402357 ms$0.007
32 h agoPassed402144 ms$0.007
36 h agoPassed402256 ms$0.007
40 h agoPassed402148 ms$0.007
44 h agoPassed402538 ms$0.007
2 days agoPassed402148 ms$0.007
2 days agoPassed402236 ms$0.007
2 days agoPassed402305 ms$0.007
3 days agoPassed402148 ms$0.007
3 days agoPassed402239 ms$0.007

History

11 Oct 2026Price changed from $0.005 to $0.007