Calc Gahs

{
  "count": 2,
  "items": [
    {
      "age_years": 40,
      "bilirubin_umol_l": 80,
      "citation": {
        "authors": "Forrest EH, Evans CD, Stewart S, et al.",
        "doi": "10.1136/gut.2004.050781",
        "id": "forrest-2005",
        "source": "Gut. 2005;54(8):1174-1179",
        "title": "Analysis of factors predictive of mortality in alcoholic hepatitis and derivation and validation of the Glasgow alcoholic hepatitis score"
      },
      "components": [
        {
          "factor": "age",
          "points": 1,
          "present": false,
          "value": 40
        },
        {
          "factor": "wbc",
          "points": 1,
          "present": false,
          "value": 8
        },
        {
          "factor": "urea",
          "points": 1,
          "present": false,
          "value": 4
        },
        {
          "factor": "pt_ratio",
          "points": 1,
          "present": false,
          "value": 1.2
        },
        {
          "factor": "bilirubin",
          "points": 1,
          "present": false,
          "value": 80
        }
      ],
      "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": "gahs",
      "formula_expression": "GAHS = age_points + wbc_points + urea_points + pt_ratio_points + bilirubin_points; range 5-12",
      "gahs_band": "lt_9",
      "max_score": 12,
      "min_score": 5,
      "pt_ratio": 1.2,
      "score": 5,
      "urea_mmol_l": 4,
      "wbc_k_ul": 8
    },
    {
      "age_years": 40,
      "bilirubin_umol_l": 80,
      "citation": {
        "authors": "Forrest EH, Evans CD, Stewart S, et al.",
        "doi": "10.1136/gut.2004.050781",
        "id": "forrest-2005",
        "source": "Gut. 2005;54(8):1174-1179",
        "title": "Analysis of factors predictive of mortality in alcoholic hepatitis and derivation and validation of the Glasgow alcoholic hepatitis score"
      },
      "components": [
        {
          "factor": "age",
          "points": 1,
          "present": false,
          "value": 40
        },
        {
          "factor": "wbc",
          "points": 1,
          "present": false,
          "value": 8
        },
        {
          "factor": "urea",
          "points": 1,
          "present": false,
          "value": 4
        },
        {
          "factor": "pt_ratio",
          "points": 1,
          "present": false,
          "value": 1.2
        },
        {
          "factor": "bilirubin",
          "points": 1,
          "present": false,
          "value": 80
        }
      ],
      "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": "gahs",
      "formula_expression": "GAHS = age_points + wbc_points + urea_points + pt_ratio_points + bilirubin_points; range 5-12",
      "gahs_band": "lt_9",
      "max_score": 12,
      "min_score": 5,
      "pt_ratio": 1.2,
      "score": 5,
      "urea_mmol_l": 4,
      "wbc_k_ul": 8
    }
  ],
  "path": "/api/calc/gahs"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.magentlab.com/api/calc/gahs' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"age":40,"bilirubin_mg_dl":4.7,"bilirubin_umol_l":80,"bun_mg_dl":11.2,"pt_ratio":1.2,"urea_mmol_l":4,"wbc_k_ul":8,"wbc_ul":8000},{"age":40,"bilirubin_mg_dl":4.7,"bilirubin_umol_l":80,"bun_mg_dl":11.2,"pt_ratio":1.2,"urea_mmol_l":4,"wbc_k_ul":8,"wbc_ul":8000}]}'

# 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/gahs' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"age":40,"bilirubin_mg_dl":4.7,"bilirubin_umol_l":80,"bun_mg_dl":11.2,"pt_ratio":1.2,"urea_mmol_l":4,"wbc_k_ul":8,"wbc_ul":8000},{"age":40,"bilirubin_mg_dl":4.7,"bilirubin_umol_l":80,"bun_mg_dl":11.2,"pt_ratio":1.2,"urea_mmol_l":4,"wbc_k_ul":8,"wbc_ul":8000}]}' \
  | 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%2Fgahs&method=POST
const res = await pay("https://api.magentlab.com/api/calc/gahs", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "age": 40,
        "bilirubin_mg_dl": 4.7,
        "bilirubin_umol_l": 80,
        "bun_mg_dl": 11.2,
        "pt_ratio": 1.2,
        "urea_mmol_l": 4,
        "wbc_k_ul": 8,
        "wbc_ul": 8000
      },
      {
        "age": 40,
        "bilirubin_mg_dl": 4.7,
        "bilirubin_umol_l": 80,
        "bun_mg_dl": 11.2,
        "pt_ratio": 1.2,
        "urea_mmol_l": 4,
        "wbc_k_ul": 8,
        "wbc_ul": 8000
      }
    ]
  }),
});
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/gahs",
        json={
            "items": [
                {
                    "age": 40,
                    "bilirubin_mg_dl": 4.7,
                    "bilirubin_umol_l": 80,
                    "bun_mg_dl": 11.2,
                    "pt_ratio": 1.2,
                    "urea_mmol_l": 4,
                    "wbc_k_ul": 8,
                    "wbc_ul": 8000,
                },
                {
                    "age": 40,
                    "bilirubin_mg_dl": 4.7,
                    "bilirubin_umol_l": 80,
                    "bun_mg_dl": 11.2,
                    "pt_ratio": 1.2,
                    "urea_mmol_l": 4,
                    "wbc_k_ul": 8,
                    "wbc_ul": 8000,
                },
            ],
        },
    )
    print(res.status_code, res.text)