Calc Metroticket 2

{
  "count": 2,
  "items": [
    {
      "afp_ng_ml": 50,
      "citation": {
        "authors": "Mazzaferro V, Sposito C, Zhou J, Pinna AD, De Carlis L, Fan J, Cescon M, Di Sandro S, Yi-feng H, Lauterio A, Bongini M, Mariani L",
        "doi": "10.1053/j.gastro.2017.09.025",
        "id": "mazzaferro-2018",
        "pmid": "28989060",
        "source": "Gastroenterology. 2018;154(1):128-139",
        "title": "Metroticket 2.0 Model for Analysis of Competing Risks of Death After Liver Transplantation for Hepatocellular Carcinoma"
      },
      "criteria": [
        {
          "factor": "afp_lt_200_sum_le_7",
          "met": true
        },
        {
          "factor": "afp_200_400_sum_le_5",
          "met": false
        },
        {
          "factor": "afp_400_1000_sum_le_4",
          "met": 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": "metroticket_2",
      "formula_expression": "meets_70pct_hcc_specific_survival iff (afp_ng_ml < 200 and size_number_sum <= 7) or (200 <= afp_ng_ml < 400 and size_number_sum <= 5) or (400 <= afp_ng_ml <= 1000 and size_number_sum <= 4); size_number_sum = tumor_count + largest_cm; afp_ng_ml > 1000 is always false (Mazzaferro 2018 AFP-adjusted-to-HCC-size 70% 5-year HCC-specific survival)",
      "largest_cm": 3,
      "meets_70pct_hcc_specific_survival": true,
      "size_number_sum": 4,
      "tumor_count": 1
    },
    {
      "afp_ng_ml": 50,
      "citation": {
        "authors": "Mazzaferro V, Sposito C, Zhou J, Pinna AD, De Carlis L, Fan J, Cescon M, Di Sandro S, Yi-feng H, Lauterio A, Bongini M, Mariani L",
        "doi": "10.1053/j.gastro.2017.09.025",
        "id": "mazzaferro-2018",
        "pmid": "28989060",
        "source": "Gastroenterology. 2018;154(1):128-139",
        "title": "Metroticket 2.0 Model for Analysis of Competing Risks of Death After Liver Transplantation for Hepatocellular Carcinoma"
      },
      "criteria": [
        {
          "factor": "afp_lt_200_sum_le_7",
          "met": true
        },
        {
          "factor": "afp_200_400_sum_le_5",
          "met": false
        },
        {
          "factor": "afp_400_1000_sum_le_4",
          "met": 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": "metroticket_2",
      "formula_expression": "meets_70pct_hcc_specific_survival iff (afp_ng_ml < 200 and size_number_sum <= 7) or (200 <= afp_ng_ml < 400 and size_number_sum <= 5) or (400 <= afp_ng_ml <= 1000 and size_number_sum <= 4); size_number_sum = tumor_count + largest_cm; afp_ng_ml > 1000 is always false (Mazzaferro 2018 AFP-adjusted-to-HCC-size 70% 5-year HCC-specific survival)",
      "largest_cm": 3,
      "meets_70pct_hcc_specific_survival": true,
      "size_number_sum": 4,
      "tumor_count": 1
    }
  ],
  "path": "/api/calc/metroticket_2"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.magentlab.com/api/calc/metroticket_2' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"afp_ng_ml":50,"largest_cm":3,"tumor_count":1},{"afp_ng_ml":50,"largest_cm":3,"tumor_count":1}]}'

# 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/metroticket_2' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"afp_ng_ml":50,"largest_cm":3,"tumor_count":1},{"afp_ng_ml":50,"largest_cm":3,"tumor_count":1}]}' \
  | 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%2Fmetroticket_2&method=POST
const res = await pay("https://api.magentlab.com/api/calc/metroticket_2", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "afp_ng_ml": 50,
        "largest_cm": 3,
        "tumor_count": 1
      },
      {
        "afp_ng_ml": 50,
        "largest_cm": 3,
        "tumor_count": 1
      }
    ]
  }),
});
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/metroticket_2",
        json={
            "items": [
                {
                    "afp_ng_ml": 50,
                    "largest_cm": 3,
                    "tumor_count": 1,
                },
                {
                    "afp_ng_ml": 50,
                    "largest_cm": 3,
                    "tumor_count": 1,
                },
            ],
        },
    )
    print(res.status_code, res.text)