Calc Flipi

{
  "citation": {
    "authors": "Solal-Céligny P, Roy P, Colombat P, White J, Armitage JO, Arranz-Saez R, Au WY, Bellei M, Brice P, Caballero D, Coiffier B, Conde-Garcia E, Doyen C, Federico M, Fisher RI, Garcia-Conde JF, Gisselbrecht C, Haioun C, LeBlanc M, Lister AT, Lopez-Guillermo A, McLaughlin P, Milpied N, Morel P, Mounier N, Proctor SJ, Rohatiner A, Smith P, Soubeyran P, Tilly H, Vitolo U, Zinzani PL, Zucca E, Montserrat E",
    "doi": "10.1182/blood-2003-12-4434",
    "id": "solal-celigny-2004",
    "pmid": "15126323",
    "source": "Blood. 2004;104(5):1258-1265",
    "title": "Follicular lymphoma international prognostic index"
  },
  "components": [
    {
      "factor": "age_gt_60",
      "points": 0,
      "present": false
    },
    {
      "factor": "stage_iii_iv",
      "points": 0,
      "present": false
    },
    {
      "factor": "hemoglobin_lt_120_g_l",
      "points": 0,
      "present": false
    },
    {
      "factor": "nodal_sites_gt_4",
      "points": 0,
      "present": false
    },
    {
      "factor": "ldh_above_uln",
      "points": 0,
      "present": 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.",
  "flipi_band": "low",
  "formula": "flipi",
  "formula_expression": "FLIPI = age_gt_60 1 + stage_iii_iv 1 + hemoglobin_lt_120_g_l 1 + nodal_sites_gt_4 1 + ldh_above_uln 1; Solal-Céligny 2004; max 5; low 0-1, intermediate 2, high ≥3",
  "max_score": 5,
  "score": 0
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.magentlab.com/api/calc/flipi?age_gt_60=false&hemoglobin_lt_120_g_l=false&ldh_above_uln=false&nodal_sites_gt_4=false&stage_iii_iv=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 - 'https://api.magentlab.com/api/calc/flipi?age_gt_60=false&hemoglobin_lt_120_g_l=false&ldh_above_uln=false&nodal_sites_gt_4=false&stage_iii_iv=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 $0.005 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%2Fflipi
const res = await pay("https://api.magentlab.com/api/calc/flipi?age_gt_60=false&hemoglobin_lt_120_g_l=false&ldh_above_uln=false&nodal_sites_gt_4=false&stage_iii_iv=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 $0.005 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/flipi?age_gt_60=false&hemoglobin_lt_120_g_l=false&ldh_above_uln=false&nodal_sites_gt_4=false&stage_iii_iv=false")
    print(res.status_code, res.text)