Calc Bard

{
  "count": 2,
  "items": [
    {
      "alt_u_l": 40,
      "ast_alt_ratio": 0.5,
      "ast_u_l": 20,
      "bmi": 25,
      "citation": {
        "authors": "Harrison SA, Oliver D, Arnold HL, Gogia S, Neuschwander-Tetri BA",
        "doi": "10.1136/gut.2007.146019",
        "id": "harrison-2008",
        "pmid": "18390575",
        "source": "Gut. 2008;57(10):1441-1447",
        "title": "Development and validation of a simple NAFLD clinical scoring system for identifying patients without advanced disease"
      },
      "components": [
        {
          "factor": "bmi_ge_28",
          "points": 0,
          "present": false,
          "value": 25
        },
        {
          "factor": "ast_alt_ratio_ge_0_8",
          "points": 0,
          "present": false,
          "value": 0.5
        },
        {
          "factor": "diabetes",
          "points": 0,
          "present": false
        }
      ],
      "diabetes": false,
      "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": "bard",
      "formula_expression": "BARD = 1 if BMI >= 28 + 2 if AST/ALT >= 0.8 + 1 if diabetes; Harrison 2008; max 4; risk_group low 0-1, high 2-4. Not a biopsy. Not F0-F4.",
      "max_score": 4,
      "risk_group": "low",
      "score": 0
    },
    {
      "alt_u_l": 40,
      "ast_alt_ratio": 0.5,
      "ast_u_l": 20,
      "bmi": 25,
      "citation": {
        "authors": "Harrison SA, Oliver D, Arnold HL, Gogia S, Neuschwander-Tetri BA",
        "doi": "10.1136/gut.2007.146019",
        "id": "harrison-2008",
        "pmid": "18390575",
        "source": "Gut. 2008;57(10):1441-1447",
        "title": "Development and validation of a simple NAFLD clinical scoring system for identifying patients without advanced disease"
      },
      "components": [
        {
          "factor": "bmi_ge_28",
          "points": 0,
          "present": false,
          "value": 25
        },
        {
          "factor": "ast_alt_ratio_ge_0_8",
          "points": 0,
          "present": false,
          "value": 0.5
        },
        {
          "factor": "diabetes",
          "points": 0,
          "present": false
        }
      ],
      "diabetes": false,
      "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": "bard",
      "formula_expression": "BARD = 1 if BMI >= 28 + 2 if AST/ALT >= 0.8 + 1 if diabetes; Harrison 2008; max 4; risk_group low 0-1, high 2-4. Not a biopsy. Not F0-F4.",
      "max_score": 4,
      "risk_group": "low",
      "score": 0
    }
  ],
  "path": "/api/calc/bard"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.magentlab.com/api/calc/bard' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"alt_u_l":40,"ast_u_l":20,"bmi":25,"diabetes":false},{"alt_u_l":40,"ast_u_l":20,"bmi":25,"diabetes":false}]}'

# 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/bard' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"alt_u_l":40,"ast_u_l":20,"bmi":25,"diabetes":false},{"alt_u_l":40,"ast_u_l":20,"bmi":25,"diabetes":false}]}' \
  | 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%2Fbard&method=POST
const res = await pay("https://api.magentlab.com/api/calc/bard", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "alt_u_l": 40,
        "ast_u_l": 20,
        "bmi": 25,
        "diabetes": false
      },
      {
        "alt_u_l": 40,
        "ast_u_l": 20,
        "bmi": 25,
        "diabetes": false
      }
    ]
  }),
});
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/bard",
        json={
            "items": [
                {
                    "alt_u_l": 40,
                    "ast_u_l": 20,
                    "bmi": 25,
                    "diabetes": False,
                },
                {
                    "alt_u_l": 40,
                    "ast_u_l": 20,
                    "bmi": 25,
                    "diabetes": False,
                },
            ],
        },
    )
    print(res.status_code, res.text)