Calc Ho Index

{
  "count": 2,
  "items": [
    {
      "albumin_g_l": 35,
      "citation": {
        "authors": "Ho GT, Mowat C, Goddard CJ, Fennell JM, Shah NB, Prescott RJ, Satsangi J",
        "doi": "10.1111/j.1365-2036.2004.01945.x",
        "id": "ho-2004",
        "pmid": "15142197",
        "source": "Aliment Pharmacol Ther. 2004;19(10):1079-1087",
        "title": "Predicting the outcome of severe ulcerative colitis: development of a novel risk score to aid early selection of patients for second-line medical therapy or surgery"
      },
      "colonic_dilatation": false,
      "components": [
        {
          "factor": "mean_stool_frequency",
          "points": 0,
          "present": false,
          "value": 3
        },
        {
          "factor": "colonic_dilatation",
          "points": 0,
          "present": false
        },
        {
          "factor": "hypoalbuminaemia",
          "points": 0,
          "present": false,
          "value": 35
        }
      ],
      "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": "ho_index",
      "formula_expression": "Ho 2004 day-3 IV-steroid severe UC: stool_points(<4 → 0; 4 ≤ mean_stool_frequency < 6 → 1; 6 ≤ x ≤ 9 → 2; x > 9 → 4) + colonic_dilatation (true → 4) + hypoalbuminaemia (albumin_g_l < 30 → 1); max 9; medical-therapy failure 0–1 → 11%, 2–3 → 43%, ≥4 → 85% (ROC operating point ≥4)",
      "hypoalbuminaemia": false,
      "max_score": 9,
      "mean_stool_frequency": 3,
      "medical_failure_percent": 11,
      "risk": "low",
      "score": 0,
      "score_ge_4": false
    },
    {
      "albumin_g_l": 35,
      "citation": {
        "authors": "Ho GT, Mowat C, Goddard CJ, Fennell JM, Shah NB, Prescott RJ, Satsangi J",
        "doi": "10.1111/j.1365-2036.2004.01945.x",
        "id": "ho-2004",
        "pmid": "15142197",
        "source": "Aliment Pharmacol Ther. 2004;19(10):1079-1087",
        "title": "Predicting the outcome of severe ulcerative colitis: development of a novel risk score to aid early selection of patients for second-line medical therapy or surgery"
      },
      "colonic_dilatation": false,
      "components": [
        {
          "factor": "mean_stool_frequency",
          "points": 0,
          "present": false,
          "value": 3
        },
        {
          "factor": "colonic_dilatation",
          "points": 0,
          "present": false
        },
        {
          "factor": "hypoalbuminaemia",
          "points": 0,
          "present": false,
          "value": 35
        }
      ],
      "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": "ho_index",
      "formula_expression": "Ho 2004 day-3 IV-steroid severe UC: stool_points(<4 → 0; 4 ≤ mean_stool_frequency < 6 → 1; 6 ≤ x ≤ 9 → 2; x > 9 → 4) + colonic_dilatation (true → 4) + hypoalbuminaemia (albumin_g_l < 30 → 1); max 9; medical-therapy failure 0–1 → 11%, 2–3 → 43%, ≥4 → 85% (ROC operating point ≥4)",
      "hypoalbuminaemia": false,
      "max_score": 9,
      "mean_stool_frequency": 3,
      "medical_failure_percent": 11,
      "risk": "low",
      "score": 0,
      "score_ge_4": false
    }
  ],
  "path": "/api/calc/ho_index"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.magentlab.com/api/calc/ho_index' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"albumin_g_dl":3.5,"albumin_g_l":35,"colonic_dilatation":false,"mean_stool_frequency":3},{"albumin_g_dl":3.5,"albumin_g_l":35,"colonic_dilatation":false,"mean_stool_frequency":3}]}'

# 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/ho_index' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"albumin_g_dl":3.5,"albumin_g_l":35,"colonic_dilatation":false,"mean_stool_frequency":3},{"albumin_g_dl":3.5,"albumin_g_l":35,"colonic_dilatation":false,"mean_stool_frequency":3}]}' \
  | 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%2Fho_index&method=POST
const res = await pay("https://api.magentlab.com/api/calc/ho_index", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "albumin_g_dl": 3.5,
        "albumin_g_l": 35,
        "colonic_dilatation": false,
        "mean_stool_frequency": 3
      },
      {
        "albumin_g_dl": 3.5,
        "albumin_g_l": 35,
        "colonic_dilatation": false,
        "mean_stool_frequency": 3
      }
    ]
  }),
});
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.post(
        "https://api.magentlab.com/api/calc/ho_index",
        json={
            "items": [
                {
                    "albumin_g_dl": 3.5,
                    "albumin_g_l": 35,
                    "colonic_dilatation": False,
                    "mean_stool_frequency": 3,
                },
                {
                    "albumin_g_dl": 3.5,
                    "albumin_g_l": 35,
                    "colonic_dilatation": False,
                    "mean_stool_frequency": 3,
                },
            ],
        },
    )
    print(res.status_code, res.text)