Calc Chosen

{
  "count": 2,
  "items": [
    {
      "age": 40,
      "albumin_g_dl": 4,
      "at_or_above_cutpoint": true,
      "citation": {
        "authors": "Levine DM, Lipsitz SR, Co Z, Song W, Dykes PC, Samal L",
        "doi": "10.1007/s11606-020-06353-5",
        "id": "levine-2020-chosen",
        "pmid": "33274414",
        "source": "J Gen Intern Med. 2021;36(3):730-737",
        "title": "Derivation of a clinical risk score to predict 14-day occurrence of hypoxia, ICU admission, and death among patients with coronavirus disease 2019"
      },
      "components": [
        {
          "factor": "age",
          "points": 5,
          "present": true,
          "value": 40
        },
        {
          "factor": "spo2_percent",
          "points": 21,
          "present": true,
          "value": 99
        },
        {
          "factor": "albumin_g_dl",
          "points": 29,
          "present": true,
          "value": 4
        }
      ],
      "cutpoint": 30,
      "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": "chosen",
      "formula_expression": "CHOSEN = age_points + spo2_points + albumin_points; Levine 2020 Figure 2; age 18-45 → 5, 46-59 → 2, 60-73 → 1, >73 → 0; SpO2 % <94 → 0, 94-96 → 9, 97-98 → 14, >98 → 21; albumin g/dL <2.8 → 0, 2.8-3.3 → 5, 3.4-3.7 → 15, >3.7 → 29; range 0-55; at_or_above_cutpoint iff score ≥30 (derivation sensitivity 83%, specificity 82%)",
      "max_score": 55,
      "score": 55,
      "spo2_percent": 99
    },
    {
      "age": 40,
      "albumin_g_dl": 4,
      "at_or_above_cutpoint": true,
      "citation": {
        "authors": "Levine DM, Lipsitz SR, Co Z, Song W, Dykes PC, Samal L",
        "doi": "10.1007/s11606-020-06353-5",
        "id": "levine-2020-chosen",
        "pmid": "33274414",
        "source": "J Gen Intern Med. 2021;36(3):730-737",
        "title": "Derivation of a clinical risk score to predict 14-day occurrence of hypoxia, ICU admission, and death among patients with coronavirus disease 2019"
      },
      "components": [
        {
          "factor": "age",
          "points": 5,
          "present": true,
          "value": 40
        },
        {
          "factor": "spo2_percent",
          "points": 21,
          "present": true,
          "value": 99
        },
        {
          "factor": "albumin_g_dl",
          "points": 29,
          "present": true,
          "value": 4
        }
      ],
      "cutpoint": 30,
      "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": "chosen",
      "formula_expression": "CHOSEN = age_points + spo2_points + albumin_points; Levine 2020 Figure 2; age 18-45 → 5, 46-59 → 2, 60-73 → 1, >73 → 0; SpO2 % <94 → 0, 94-96 → 9, 97-98 → 14, >98 → 21; albumin g/dL <2.8 → 0, 2.8-3.3 → 5, 3.4-3.7 → 15, >3.7 → 29; range 0-55; at_or_above_cutpoint iff score ≥30 (derivation sensitivity 83%, specificity 82%)",
      "max_score": 55,
      "score": 55,
      "spo2_percent": 99
    }
  ],
  "path": "/api/calc/chosen"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.magentlab.com/api/calc/chosen' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"age":40,"albumin_g_dl":4,"spo2_percent":99},{"age":40,"albumin_g_dl":4,"spo2_percent":99}]}'

# 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/chosen' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"age":40,"albumin_g_dl":4,"spo2_percent":99},{"age":40,"albumin_g_dl":4,"spo2_percent":99}]}' \
  | 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%2Fchosen&method=POST
const res = await pay("https://api.magentlab.com/api/calc/chosen", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "age": 40,
        "albumin_g_dl": 4,
        "spo2_percent": 99
      },
      {
        "age": 40,
        "albumin_g_dl": 4,
        "spo2_percent": 99
      }
    ]
  }),
});
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/chosen",
        json={
            "items": [
                {
                    "age": 40,
                    "albumin_g_dl": 4,
                    "spo2_percent": 99,
                },
                {
                    "age": 40,
                    "albumin_g_dl": 4,
                    "spo2_percent": 99,
                },
            ],
        },
    )
    print(res.status_code, res.text)