Calc Hope

{
  "count": 2,
  "items": [
    {
      "age_years": 40,
      "asphyxia": false,
      "citation": {
        "authors": "Pasquier M, Hugli O, Paal P, Darocha T, Blancher M, Husby P, Silfvast T, Carron PN, Rousson V",
        "doi": "10.1016/j.resuscitation.2018.02.026",
        "id": "pasquier-2018",
        "pmid": "29481910",
        "source": "Resuscitation. 2018;126:58-64",
        "title": "Hypothermia outcome prediction after extracorporeal life support for hypothermic cardiac arrest patients: The HOPE score"
      },
      "cpr_duration_min": 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.",
      "estimated_survival_percent": 83.14,
      "formula": "hope",
      "formula_expression": "logit = 2.44 - 1.55*male - 1.95*asphyxia - 0.0191*age - 2.07*log2(potassium_mmol_l) - 0.573*log2(cpr_duration_min) + 0.937*temperature_c - 0.0247*temperature_c^2; survival_probability = exp(logit)/(1+exp(logit)); estimated_survival_percent = 100 * survival_probability from the unrounded logit, 2 decimals; male is 1 if sex is male else 0; asphyxia is 1 if asphyxia-related (head fully covered by water or snow AND cardiac arrest at extrication) else 0; hope_ge_10_percent is true when survival_probability >= 0.10 (Pasquier 2018 Table 2)",
      "hope_ge_10_percent": true,
      "logit": 1.6,
      "potassium_mmol_l": 4,
      "sex": "female",
      "temperature_c": 28
    },
    {
      "age_years": 40,
      "asphyxia": false,
      "citation": {
        "authors": "Pasquier M, Hugli O, Paal P, Darocha T, Blancher M, Husby P, Silfvast T, Carron PN, Rousson V",
        "doi": "10.1016/j.resuscitation.2018.02.026",
        "id": "pasquier-2018",
        "pmid": "29481910",
        "source": "Resuscitation. 2018;126:58-64",
        "title": "Hypothermia outcome prediction after extracorporeal life support for hypothermic cardiac arrest patients: The HOPE score"
      },
      "cpr_duration_min": 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.",
      "estimated_survival_percent": 83.14,
      "formula": "hope",
      "formula_expression": "logit = 2.44 - 1.55*male - 1.95*asphyxia - 0.0191*age - 2.07*log2(potassium_mmol_l) - 0.573*log2(cpr_duration_min) + 0.937*temperature_c - 0.0247*temperature_c^2; survival_probability = exp(logit)/(1+exp(logit)); estimated_survival_percent = 100 * survival_probability from the unrounded logit, 2 decimals; male is 1 if sex is male else 0; asphyxia is 1 if asphyxia-related (head fully covered by water or snow AND cardiac arrest at extrication) else 0; hope_ge_10_percent is true when survival_probability >= 0.10 (Pasquier 2018 Table 2)",
      "hope_ge_10_percent": true,
      "logit": 1.6,
      "potassium_mmol_l": 4,
      "sex": "female",
      "temperature_c": 28
    }
  ],
  "path": "/api/calc/hope"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.magentlab.com/api/calc/hope' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"age":40,"asphyxia":false,"cpr_duration_min":30,"potassium_mmol_l":4,"sex":"female","temperature_c":28},{"age":40,"asphyxia":false,"cpr_duration_min":30,"potassium_mmol_l":4,"sex":"female","temperature_c":28}]}'

# 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/hope' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"age":40,"asphyxia":false,"cpr_duration_min":30,"potassium_mmol_l":4,"sex":"female","temperature_c":28},{"age":40,"asphyxia":false,"cpr_duration_min":30,"potassium_mmol_l":4,"sex":"female","temperature_c":28}]}' \
  | 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%2Fhope&method=POST
const res = await pay("https://api.magentlab.com/api/calc/hope", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "age": 40,
        "asphyxia": false,
        "cpr_duration_min": 30,
        "potassium_mmol_l": 4,
        "sex": "female",
        "temperature_c": 28
      },
      {
        "age": 40,
        "asphyxia": false,
        "cpr_duration_min": 30,
        "potassium_mmol_l": 4,
        "sex": "female",
        "temperature_c": 28
      }
    ]
  }),
});
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/hope",
        json={
            "items": [
                {
                    "age": 40,
                    "asphyxia": False,
                    "cpr_duration_min": 30,
                    "potassium_mmol_l": 4,
                    "sex": "female",
                    "temperature_c": 28,
                },
                {
                    "age": 40,
                    "asphyxia": False,
                    "cpr_duration_min": 30,
                    "potassium_mmol_l": 4,
                    "sex": "female",
                    "temperature_c": 28,
                },
            ],
        },
    )
    print(res.status_code, res.text)