Calc Egus

{
  "count": 2,
  "items": [
    {
      "citation": {
        "authors": "Brindle WM, Grant RK, Smith M, Suddaby M, Wallace A, Gillespie SL, Church NI, Noble CL, Penman ID, Plevris JN, Robertson AR, Watson EF, Selinger CP, Kalla R, Masterton GSM, EGAR (Edinburgh GI Audit and Research) Collaborative",
        "doi": "10.1136/flgastro-2020-101759",
        "id": "brindle-2021",
        "pmid": "35295750",
        "source": "Frontline Gastroenterol. 2021;13(2):111-118",
        "title": "Risk stratifying gastric ulcers: development and validation of a scoring system"
      },
      "components": [
        {
          "factor": "age",
          "points": 0,
          "present": true,
          "value": 50
        },
        {
          "factor": "ulcer_size_cm",
          "points": 0,
          "present": true,
          "value": 1
        },
        {
          "factor": "location",
          "points": 0,
          "present": true,
          "value": "antral"
        }
      ],
      "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": "egus",
      "formula_expression": "EGUS = age_points + ulcer_size_points + location_points; age <68 → 0, 68-79 → 1, ≥80 → 2; size <1.25 cm → 0, 1.25-2.99 cm → 2, ≥3.00 cm → 3 (no 1-point size band); antral 0, non-antral 1; max 6; higher_malignancy_risk iff score ≥ 3 (Brindle 2021 Youden cut)",
      "higher_malignancy_risk": false,
      "max_score": 6,
      "score": 0
    },
    {
      "citation": {
        "authors": "Brindle WM, Grant RK, Smith M, Suddaby M, Wallace A, Gillespie SL, Church NI, Noble CL, Penman ID, Plevris JN, Robertson AR, Watson EF, Selinger CP, Kalla R, Masterton GSM, EGAR (Edinburgh GI Audit and Research) Collaborative",
        "doi": "10.1136/flgastro-2020-101759",
        "id": "brindle-2021",
        "pmid": "35295750",
        "source": "Frontline Gastroenterol. 2021;13(2):111-118",
        "title": "Risk stratifying gastric ulcers: development and validation of a scoring system"
      },
      "components": [
        {
          "factor": "age",
          "points": 0,
          "present": true,
          "value": 50
        },
        {
          "factor": "ulcer_size_cm",
          "points": 0,
          "present": true,
          "value": 1
        },
        {
          "factor": "location",
          "points": 0,
          "present": true,
          "value": "antral"
        }
      ],
      "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": "egus",
      "formula_expression": "EGUS = age_points + ulcer_size_points + location_points; age <68 → 0, 68-79 → 1, ≥80 → 2; size <1.25 cm → 0, 1.25-2.99 cm → 2, ≥3.00 cm → 3 (no 1-point size band); antral 0, non-antral 1; max 6; higher_malignancy_risk iff score ≥ 3 (Brindle 2021 Youden cut)",
      "higher_malignancy_risk": false,
      "max_score": 6,
      "score": 0
    }
  ],
  "path": "/api/calc/egus"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.magentlab.com/api/calc/egus' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"age":50,"location":"antral","ulcer_size_cm":1},{"age":50,"location":"antral","ulcer_size_cm":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/egus' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"age":50,"location":"antral","ulcer_size_cm":1},{"age":50,"location":"antral","ulcer_size_cm":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%2Fegus&method=POST
const res = await pay("https://api.magentlab.com/api/calc/egus", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "age": 50,
        "location": "antral",
        "ulcer_size_cm": 1
      },
      {
        "age": 50,
        "location": "antral",
        "ulcer_size_cm": 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/egus",
        json={
            "items": [
                {
                    "age": 50,
                    "location": "antral",
                    "ulcer_size_cm": 1,
                },
                {
                    "age": 50,
                    "location": "antral",
                    "ulcer_size_cm": 1,
                },
            ],
        },
    )
    print(res.status_code, res.text)