Calc Hep

{
  "citation": {
    "authors": "Cuker A, Arepally G, Crowther MA, Rice L, Datko F, Hook K, Propert KJ, Kuter DJ, Ortel TL, Konkle BA, Cines DB",
    "doi": "10.1111/j.1538-7836.2010.04059.x",
    "id": "cuker-2010",
    "pmid": "20854372",
    "source": "J Thromb Haemost. 2010;8(12):2642-2650",
    "title": "The HIT Expert Probability (HEP) Score: a novel pre-test probability model for heparin-induced thrombocytopenia based on broad expert opinion"
  },
  "components": [
    {
      "factor": "magnitude",
      "points": 3,
      "present": true,
      "value": "gt_50"
    },
    {
      "factor": "timing",
      "points": 3,
      "present": true,
      "value": "typical_5_10"
    },
    {
      "factor": "nadir",
      "points": 2,
      "present": true,
      "value": "gt_20"
    },
    {
      "factor": "thrombosis",
      "points": 3,
      "present": true,
      "value": "typical_new_ge_4d"
    },
    {
      "factor": "skin_necrosis",
      "points": 0,
      "present": false
    },
    {
      "factor": "systemic_reaction",
      "points": 0,
      "present": false
    },
    {
      "factor": "bleeding",
      "points": 0,
      "present": false
    },
    {
      "factor": "chronic_thrombocytopenia",
      "points": 0,
      "present": false
    },
    {
      "factor": "new_drug_thrombocytopenia",
      "points": 0,
      "present": false
    },
    {
      "factor": "severe_infection",
      "points": 0,
      "present": false
    },
    {
      "factor": "overt_dic",
      "points": 0,
      "present": false
    },
    {
      "factor": "intra_arterial_device",
      "points": 0,
      "present": false
    },
    {
      "factor": "cpb_96h",
      "points": 0,
      "present": false
    },
    {
      "factor": "no_other_cause",
      "points": 3,
      "present": true
    }
  ],
  "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": "hep",
  "formula_expression": "HEP = magnitude (lt_30 -1, 30_to_50 1, gt_50 3) + timing (typical_lt_4 -2, typical_day_4 2, typical_5_10 3, typical_11_14 2, typical_gt_14 -1; rapid_lt_48h 2, rapid_gt_48h -1) + nadir (le_20 -2, gt_20 2) + thrombosis select at most one (none 0; typical_new_ge_4d 3, typical_progression 2; rapid_new 3, rapid_progression 2) + skin_necrosis 3 + systemic_reaction 2 + bleeding -1 + other causes select all (chronic_thrombocytopenia -1, new_drug_thrombocytopenia -2, severe_infection -2, overt_dic -2, intra_arterial_device -2, cpb_96h -1, no_other_cause 3 mutually exclusive with other causes); Cuker 2010; range -16 to 19; cutoff 2 was 100% sensitive / 60% specific vs expert panel; cutoff 5 was 86% sensitive / 88% specific",
  "max_score": 19,
  "score": 14,
  "score_ge_2": true,
  "score_ge_5": true
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.magentlab.com/api/calc/hep?bleeding=false&chronic_thrombocytopenia=false&cpb_96h=false&intra_arterial_device=false&magnitude=gt_50&nadir=gt_20&new_drug_thrombocytopenia=false&no_other_cause=true&overt_dic=false&severe_infection=false&skin_necrosis=false&systemic_reaction=false&thrombosis=typical_new_ge_4d&timing=typical_5_10'

# 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/hep?bleeding=false&chronic_thrombocytopenia=false&cpb_96h=false&intra_arterial_device=false&magnitude=gt_50&nadir=gt_20&new_drug_thrombocytopenia=false&no_other_cause=true&overt_dic=false&severe_infection=false&skin_necrosis=false&systemic_reaction=false&thrombosis=typical_new_ge_4d&timing=typical_5_10' \
  | 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%2Fhep
const res = await pay("https://api.magentlab.com/api/calc/hep?bleeding=false&chronic_thrombocytopenia=false&cpb_96h=false&intra_arterial_device=false&magnitude=gt_50&nadir=gt_20&new_drug_thrombocytopenia=false&no_other_cause=true&overt_dic=false&severe_infection=false&skin_necrosis=false&systemic_reaction=false&thrombosis=typical_new_ge_4d&timing=typical_5_10");
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/hep?bleeding=false&chronic_thrombocytopenia=false&cpb_96h=false&intra_arterial_device=false&magnitude=gt_50&nadir=gt_20&new_drug_thrombocytopenia=false&no_other_cause=true&overt_dic=false&severe_infection=false&skin_necrosis=false&systemic_reaction=false&thrombosis=typical_new_ge_4d&timing=typical_5_10")
    print(res.status_code, res.text)