Calc He Macs

{
  "count": 2,
  "items": [
    {
      "acute_ecg_ischaemia": false,
      "age": 40,
      "citation": {
        "authors": "Alghamdi A, Howard L, Reynard C, et al.",
        "doi": "10.1097/MEJ.0000000000000575",
        "id": "alghamdi-2019",
        "pmid": "30289775",
        "source": "Eur J Emerg Med. 2019;26(5):356-361",
        "title": "Enhanced triage for patients with suspected cardiac chest pain: the History and Electrocardiogram-only Manchester Acute Coronary Syndromes decision aid"
      },
      "current_smoker": 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": "he_macs",
      "formula_expression": "p = 1/(1+e^(-λ)); λ = 1.426*a + 1.838*b + 0.734*c + 0.996*d + 1.353*e + 0.675*f + 0.024*g + 0.462*h - 4.416; a sweating observed 0/1; b acute ECG ischaemia 0/1; c pain radiating to right arm or shoulder 0/1; d vomiting associated with pain 0/1; e systolic BP <100 mmHg 0/1; f current tobacco smoker 0/1; g age in years (continuous); h male sex 1, female 0 (Alghamdi 2019 Table 2 printed values)",
      "hypotension": false,
      "linear_predictor": -3.456,
      "pain_radiation_right_arm_or_shoulder": false,
      "probability": 0.0306,
      "sex": "female",
      "sweating_observed": false,
      "vomiting": false
    },
    {
      "acute_ecg_ischaemia": false,
      "age": 40,
      "citation": {
        "authors": "Alghamdi A, Howard L, Reynard C, et al.",
        "doi": "10.1097/MEJ.0000000000000575",
        "id": "alghamdi-2019",
        "pmid": "30289775",
        "source": "Eur J Emerg Med. 2019;26(5):356-361",
        "title": "Enhanced triage for patients with suspected cardiac chest pain: the History and Electrocardiogram-only Manchester Acute Coronary Syndromes decision aid"
      },
      "current_smoker": 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": "he_macs",
      "formula_expression": "p = 1/(1+e^(-λ)); λ = 1.426*a + 1.838*b + 0.734*c + 0.996*d + 1.353*e + 0.675*f + 0.024*g + 0.462*h - 4.416; a sweating observed 0/1; b acute ECG ischaemia 0/1; c pain radiating to right arm or shoulder 0/1; d vomiting associated with pain 0/1; e systolic BP <100 mmHg 0/1; f current tobacco smoker 0/1; g age in years (continuous); h male sex 1, female 0 (Alghamdi 2019 Table 2 printed values)",
      "hypotension": false,
      "linear_predictor": -3.456,
      "pain_radiation_right_arm_or_shoulder": false,
      "probability": 0.0306,
      "sex": "female",
      "sweating_observed": false,
      "vomiting": false
    }
  ],
  "path": "/api/calc/he_macs"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.magentlab.com/api/calc/he_macs' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"acute_ecg_ischaemia":false,"age":40,"current_smoker":false,"hypotension":false,"pain_radiation_right_arm_or_shoulder":false,"sex":"female","sweating_observed":false,"vomiting":false},{"acute_ecg_ischaemia":false,"age":40,"current_smoker":false,"hypotension":false,"pain_radiation_right_arm_or_shoulder":false,"sex":"female","sweating_observed":false,"vomiting":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/he_macs' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"acute_ecg_ischaemia":false,"age":40,"current_smoker":false,"hypotension":false,"pain_radiation_right_arm_or_shoulder":false,"sex":"female","sweating_observed":false,"vomiting":false},{"acute_ecg_ischaemia":false,"age":40,"current_smoker":false,"hypotension":false,"pain_radiation_right_arm_or_shoulder":false,"sex":"female","sweating_observed":false,"vomiting":false}]}' \
  | 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%2Fhe_macs&method=POST
const res = await pay("https://api.magentlab.com/api/calc/he_macs", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "acute_ecg_ischaemia": false,
        "age": 40,
        "current_smoker": false,
        "hypotension": false,
        "pain_radiation_right_arm_or_shoulder": false,
        "sex": "female",
        "sweating_observed": false,
        "vomiting": false
      },
      {
        "acute_ecg_ischaemia": false,
        "age": 40,
        "current_smoker": false,
        "hypotension": false,
        "pain_radiation_right_arm_or_shoulder": false,
        "sex": "female",
        "sweating_observed": false,
        "vomiting": false
      }
    ]
  }),
});
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/he_macs",
        json={
            "items": [
                {
                    "acute_ecg_ischaemia": False,
                    "age": 40,
                    "current_smoker": False,
                    "hypotension": False,
                    "pain_radiation_right_arm_or_shoulder": False,
                    "sex": "female",
                    "sweating_observed": False,
                    "vomiting": False,
                },
                {
                    "acute_ecg_ischaemia": False,
                    "age": 40,
                    "current_smoker": False,
                    "hypotension": False,
                    "pain_radiation_right_arm_or_shoulder": False,
                    "sex": "female",
                    "sweating_observed": False,
                    "vomiting": False,
                },
            ],
        },
    )
    print(res.status_code, res.text)