Calc Kim Meldna

{
  "count": 2,
  "items": [
    {
      "bilirubin_mg_dl": 1.1,
      "bilirubin_used_mg_dl": 1.1,
      "citation": {
        "authors": "Kim WR, Biggins SW, Kremers WK, Wiesner RH, Kamath PS, Benson JT, Edwards E, Therneau TM",
        "doi": "10.1056/NEJMoa0801209",
        "id": "kim-2008-meldna",
        "pmid": "18768945",
        "source": "N Engl J Med. 2008;359(10):1018-1026",
        "title": "Hyponatremia and mortality among patients on the liver-transplant waiting list"
      },
      "creatinine_mg_dl": 1.2,
      "creatinine_used_mg_dl": 1.2,
      "dialysis": 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": "kim_meldna_2008",
      "formula_expression": "MELD = round(10 * (0.957*ln(Cr) + 0.378*ln(bili) + 1.120*ln(INR) + 0.643)); MELDNa = round(MELD - Na - 0.025*MELD*(140 - Na) + 140); dialysis sets Cr 4.0 else Cr clamp 1.0-4.0; bili and INR floor 1.0; Na bound 125-140. Kim 2008 NEJM, not OPTN 2016, not MELD 3.0",
      "inr": 1.1,
      "inr_used": 1.1,
      "meld": 10,
      "meld_na": 21,
      "sodium_mmol_l": 125,
      "sodium_used_mmol_l": 125
    },
    {
      "bilirubin_mg_dl": 1.1,
      "bilirubin_used_mg_dl": 1.1,
      "citation": {
        "authors": "Kim WR, Biggins SW, Kremers WK, Wiesner RH, Kamath PS, Benson JT, Edwards E, Therneau TM",
        "doi": "10.1056/NEJMoa0801209",
        "id": "kim-2008-meldna",
        "pmid": "18768945",
        "source": "N Engl J Med. 2008;359(10):1018-1026",
        "title": "Hyponatremia and mortality among patients on the liver-transplant waiting list"
      },
      "creatinine_mg_dl": 1.2,
      "creatinine_used_mg_dl": 1.2,
      "dialysis": 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": "kim_meldna_2008",
      "formula_expression": "MELD = round(10 * (0.957*ln(Cr) + 0.378*ln(bili) + 1.120*ln(INR) + 0.643)); MELDNa = round(MELD - Na - 0.025*MELD*(140 - Na) + 140); dialysis sets Cr 4.0 else Cr clamp 1.0-4.0; bili and INR floor 1.0; Na bound 125-140. Kim 2008 NEJM, not OPTN 2016, not MELD 3.0",
      "inr": 1.1,
      "inr_used": 1.1,
      "meld": 10,
      "meld_na": 21,
      "sodium_mmol_l": 125,
      "sodium_used_mmol_l": 125
    }
  ],
  "path": "/api/calc/kim_meldna"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.magentlab.com/api/calc/kim_meldna' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"bilirubin_mg_dl":1.1,"bilirubin_umol_l":19,"creatinine_mg_dl":1.2,"creatinine_umol_l":106,"dialysis":false,"inr":1.1,"sodium_mmol_l":125},{"bilirubin_mg_dl":1.1,"bilirubin_umol_l":19,"creatinine_mg_dl":1.2,"creatinine_umol_l":106,"dialysis":false,"inr":1.1,"sodium_mmol_l":125}]}'

# 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/kim_meldna' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"bilirubin_mg_dl":1.1,"bilirubin_umol_l":19,"creatinine_mg_dl":1.2,"creatinine_umol_l":106,"dialysis":false,"inr":1.1,"sodium_mmol_l":125},{"bilirubin_mg_dl":1.1,"bilirubin_umol_l":19,"creatinine_mg_dl":1.2,"creatinine_umol_l":106,"dialysis":false,"inr":1.1,"sodium_mmol_l":125}]}' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode

// 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%2Fkim_meldna&method=POST
const res = await pay("https://api.magentlab.com/api/calc/kim_meldna", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "bilirubin_mg_dl": 1.1,
        "bilirubin_umol_l": 19,
        "creatinine_mg_dl": 1.2,
        "creatinine_umol_l": 106,
        "dialysis": false,
        "inr": 1.1,
        "sodium_mmol_l": 125
      },
      {
        "bilirubin_mg_dl": 1.1,
        "bilirubin_umol_l": 19,
        "creatinine_mg_dl": 1.2,
        "creatinine_umol_l": 106,
        "dialysis": false,
        "inr": 1.1,
        "sodium_mmol_l": 125
      }
    ]
  }),
});
console.log(res.status, await res.text());

# 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/kim_meldna",
        json={
            "items": [
                {
                    "bilirubin_mg_dl": 1.1,
                    "bilirubin_umol_l": 19,
                    "creatinine_mg_dl": 1.2,
                    "creatinine_umol_l": 106,
                    "dialysis": False,
                    "inr": 1.1,
                    "sodium_mmol_l": 125,
                },
                {
                    "bilirubin_mg_dl": 1.1,
                    "bilirubin_umol_l": 19,
                    "creatinine_mg_dl": 1.2,
                    "creatinine_umol_l": 106,
                    "dialysis": False,
                    "inr": 1.1,
                    "sodium_mmol_l": 125,
                },
            ],
        },
    )
    print(res.status_code, res.text)