Calc Lights

{
  "count": 2,
  "items": [
    {
      "citation": {
        "authors": "Light RW, Macgregor MI, Luchsinger PC, Ball WC Jr",
        "doi": "10.7326/0003-4819-77-4-507",
        "id": "light-1972",
        "source": "Ann Intern Med. 1972;77(4):507-513",
        "title": "Pleural effusions: the diagnostic separation of transudates and exudates"
      },
      "criteria": [
        {
          "factor": "protein_ratio_gt_0_5",
          "met": false,
          "value": 0.5
        },
        {
          "factor": "ldh_ratio_gt_0_6",
          "met": false,
          "value": 0.5
        },
        {
          "factor": "pleural_ldh_gt_two_thirds_uln",
          "met": false,
          "value": 100
        }
      ],
      "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.",
      "exudate": false,
      "formula": "lights",
      "formula_expression": "exudate if pleural_protein_g_dl / serum_protein_g_dl > 0.5 or pleural_ldh_u_l / serum_ldh_u_l > 0.6 or pleural_ldh_u_l > (2/3) * ldh_uln_u_l",
      "ldh_ratio": 0.5,
      "ldh_two_thirds_uln": 133.3,
      "pleural_ldh_u_l": 100,
      "protein_ratio": 0.5
    },
    {
      "citation": {
        "authors": "Light RW, Macgregor MI, Luchsinger PC, Ball WC Jr",
        "doi": "10.7326/0003-4819-77-4-507",
        "id": "light-1972",
        "source": "Ann Intern Med. 1972;77(4):507-513",
        "title": "Pleural effusions: the diagnostic separation of transudates and exudates"
      },
      "criteria": [
        {
          "factor": "protein_ratio_gt_0_5",
          "met": false,
          "value": 0.5
        },
        {
          "factor": "ldh_ratio_gt_0_6",
          "met": false,
          "value": 0.5
        },
        {
          "factor": "pleural_ldh_gt_two_thirds_uln",
          "met": false,
          "value": 100
        }
      ],
      "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.",
      "exudate": false,
      "formula": "lights",
      "formula_expression": "exudate if pleural_protein_g_dl / serum_protein_g_dl > 0.5 or pleural_ldh_u_l / serum_ldh_u_l > 0.6 or pleural_ldh_u_l > (2/3) * ldh_uln_u_l",
      "ldh_ratio": 0.5,
      "ldh_two_thirds_uln": 133.3,
      "pleural_ldh_u_l": 100,
      "protein_ratio": 0.5
    }
  ],
  "path": "/api/calc/lights"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.magentlab.com/api/calc/lights' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"ldh_uln_u_l":200,"pleural_ldh_u_l":100,"pleural_protein_g_dl":3,"serum_ldh_u_l":200,"serum_protein_g_dl":6},{"ldh_uln_u_l":200,"pleural_ldh_u_l":100,"pleural_protein_g_dl":3,"serum_ldh_u_l":200,"serum_protein_g_dl":6}]}'

# 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/lights' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"ldh_uln_u_l":200,"pleural_ldh_u_l":100,"pleural_protein_g_dl":3,"serum_ldh_u_l":200,"serum_protein_g_dl":6},{"ldh_uln_u_l":200,"pleural_ldh_u_l":100,"pleural_protein_g_dl":3,"serum_ldh_u_l":200,"serum_protein_g_dl":6}]}' \
  | 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%2Flights&method=POST
const res = await pay("https://api.magentlab.com/api/calc/lights", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "ldh_uln_u_l": 200,
        "pleural_ldh_u_l": 100,
        "pleural_protein_g_dl": 3,
        "serum_ldh_u_l": 200,
        "serum_protein_g_dl": 6
      },
      {
        "ldh_uln_u_l": 200,
        "pleural_ldh_u_l": 100,
        "pleural_protein_g_dl": 3,
        "serum_ldh_u_l": 200,
        "serum_protein_g_dl": 6
      }
    ]
  }),
});
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/lights",
        json={
            "items": [
                {
                    "ldh_uln_u_l": 200,
                    "pleural_ldh_u_l": 100,
                    "pleural_protein_g_dl": 3,
                    "serum_ldh_u_l": 200,
                    "serum_protein_g_dl": 6,
                },
                {
                    "ldh_uln_u_l": 200,
                    "pleural_ldh_u_l": 100,
                    "pleural_protein_g_dl": 3,
                    "serum_ldh_u_l": 200,
                    "serum_protein_g_dl": 6,
                },
            ],
        },
    )
    print(res.status_code, res.text)