Calc Lace

{
  "count": 2,
  "items": [
    {
      "acute_admission": false,
      "charlson": 0,
      "citation": {
        "authors": "van Walraven C, Dhalla IA, Bell C, Etchells E, Stiell IG, Zarnke K, Austin PC, Forster AJ",
        "doi": "10.1503/cmaj.091117",
        "id": "van-walraven-2010",
        "pmid": "20194559",
        "source": "CMAJ. 2010;182(6):551-557",
        "title": "Derivation and validation of an index to predict early death or unplanned readmission after discharge from hospital to the community"
      },
      "components": [
        {
          "factor": "length_of_stay",
          "points": 1,
          "present": true,
          "value": 1
        },
        {
          "factor": "acute_admission",
          "points": 0,
          "present": false
        },
        {
          "factor": "charlson",
          "points": 0,
          "present": false,
          "value": 0
        },
        {
          "factor": "ed_visits_6mo",
          "points": 0,
          "present": false,
          "value": 0
        }
      ],
      "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.",
      "ed_visits_6mo": 0,
      "formula": "lace",
      "formula_expression": "LACE = los_points + acute_admission_points + charlson_points + ed_visits_points; van Walraven 2010 Table 3; LOS <1 0, 1 1, 2 2, 3 3, 4-6 4, 7-13 5, >=14 7; acute true 3; Charlson 0-3 identity, >=4 5; ED 0-3 identity, >=4 4; max 19",
      "length_of_stay_days": 1,
      "max_score": 19,
      "score": 1
    },
    {
      "acute_admission": false,
      "charlson": 0,
      "citation": {
        "authors": "van Walraven C, Dhalla IA, Bell C, Etchells E, Stiell IG, Zarnke K, Austin PC, Forster AJ",
        "doi": "10.1503/cmaj.091117",
        "id": "van-walraven-2010",
        "pmid": "20194559",
        "source": "CMAJ. 2010;182(6):551-557",
        "title": "Derivation and validation of an index to predict early death or unplanned readmission after discharge from hospital to the community"
      },
      "components": [
        {
          "factor": "length_of_stay",
          "points": 1,
          "present": true,
          "value": 1
        },
        {
          "factor": "acute_admission",
          "points": 0,
          "present": false
        },
        {
          "factor": "charlson",
          "points": 0,
          "present": false,
          "value": 0
        },
        {
          "factor": "ed_visits_6mo",
          "points": 0,
          "present": false,
          "value": 0
        }
      ],
      "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.",
      "ed_visits_6mo": 0,
      "formula": "lace",
      "formula_expression": "LACE = los_points + acute_admission_points + charlson_points + ed_visits_points; van Walraven 2010 Table 3; LOS <1 0, 1 1, 2 2, 3 3, 4-6 4, 7-13 5, >=14 7; acute true 3; Charlson 0-3 identity, >=4 5; ED 0-3 identity, >=4 4; max 19",
      "length_of_stay_days": 1,
      "max_score": 19,
      "score": 1
    }
  ],
  "path": "/api/calc/lace"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.magentlab.com/api/calc/lace' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"acute_admission":false,"charlson":0,"ed_visits_6mo":0,"length_of_stay_days":1},{"acute_admission":false,"charlson":0,"ed_visits_6mo":0,"length_of_stay_days":1}]}'

# 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/lace' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"acute_admission":false,"charlson":0,"ed_visits_6mo":0,"length_of_stay_days":1},{"acute_admission":false,"charlson":0,"ed_visits_6mo":0,"length_of_stay_days":1}]}' \
  | 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%2Flace&method=POST
const res = await pay("https://api.magentlab.com/api/calc/lace", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "acute_admission": false,
        "charlson": 0,
        "ed_visits_6mo": 0,
        "length_of_stay_days": 1
      },
      {
        "acute_admission": false,
        "charlson": 0,
        "ed_visits_6mo": 0,
        "length_of_stay_days": 1
      }
    ]
  }),
});
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/lace",
        json={
            "items": [
                {
                    "acute_admission": False,
                    "charlson": 0,
                    "ed_visits_6mo": 0,
                    "length_of_stay_days": 1,
                },
                {
                    "acute_admission": False,
                    "charlson": 0,
                    "ed_visits_6mo": 0,
                    "length_of_stay_days": 1,
                },
            ],
        },
    )
    print(res.status_code, res.text)