Calc Mars

{
  "age": 50,
  "citation": {
    "authors": "Jawhar M, Schwaab J, Álvarez-Twose I, Shoumariyeh K, Naumann N, Lübke J, Perkins C, Muñoz-González JI, Meggendorfer M, Kennedy V, Metzgeroth G, Fabarius A, Pfeifer D, Sotlar K, Horny HP, von Bubnoff N, Haferlach T, Cross NCP, Hofmann WK, Sperr WR, García-Montero AC, Valent P, Gotlib J, Orfao A, Reiter A",
    "doi": "10.1200/JCO.19.00640",
    "id": "jawhar-2019",
    "pmid": "31509472",
    "source": "J Clin Oncol. 2019;37(31):2846-2856",
    "title": "MARS: Mutation-Adjusted Risk Score for Advanced Systemic Mastocytosis"
  },
  "components": [
    {
      "factor": "age_gt_60",
      "points": 0,
      "present": false,
      "value": 50
    },
    {
      "factor": "hemoglobin_lt_10",
      "points": 0,
      "present": false,
      "value": 12
    },
    {
      "factor": "platelets_lt_100",
      "points": 0,
      "present": false,
      "value": 200
    },
    {
      "factor": "sar_mutations",
      "points": 0,
      "present": false,
      "value": 0
    }
  ],
  "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": "mars",
  "formula_expression": "MARS = age_gt_60 1 + hemoglobin_lt_10 1 + platelets_lt_100 1 + sar_mutations (exactly one S/A/R 1, two or more 2; SRSF2, ASXL1, RUNX1); Jawhar 2019; max 5; low 0-1 (training-set median OS not reached), intermediate 2 (3.9 years), high 3-5 (1.9 years)",
  "hemoglobin_g_dl": 12,
  "max_score": 5,
  "platelets_10e9_l": 200,
  "risk_band": "low",
  "sar_mutation_count": 0,
  "score": 0
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.magentlab.com/api/calc/mars?age=50&hemoglobin_g_dl=12&hemoglobin_g_l=120&platelets_10e9_l=200&sar_mutation_count=0'

# 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 - 'https://api.magentlab.com/api/calc/mars?age=50&hemoglobin_g_dl=12&hemoglobin_g_l=120&platelets_10e9_l=200&sar_mutation_count=0' \
  | 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 $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
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 $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.magentlab.com%2Fapi%2Fcalc%2Fmars
const res = await pay("https://api.magentlab.com/api/calc/mars?age=50&hemoglobin_g_dl=12&hemoglobin_g_l=120&platelets_10e9_l=200&sar_mutation_count=0");
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 $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
register_exact_evm_client(client, EthAccountSigner(Account.from_key(os.environ["EVM_PRIVATE_KEY"])))

with x402_requests(client) as session:
    res = session.get("https://api.magentlab.com/api/calc/mars?age=50&hemoglobin_g_dl=12&hemoglobin_g_l=120&platelets_10e9_l=200&sar_mutation_count=0")
    print(res.status_code, res.text)