Calc Rule 7s

{
  "count": 2,
  "items": [
    {
      "citation": {
        "authors": "Cohn KA, Thompson AD, Shah SS, Hines EM, Lyons TW, Welsh EJ, Nigrovic LE",
        "doi": "10.1542/peds.2011-1215",
        "id": "cohn-2012",
        "pmid": "22184646",
        "source": "Pediatrics. 2012;129(1):e46-e53",
        "title": "Validation of a clinical prediction rule to distinguish Lyme meningitis from aseptic meningitis"
      },
      "criteria": [
        {
          "factor": "headache_days_lt_7",
          "met": true,
          "value": 3
        },
        {
          "factor": "csf_mononuclear_percent_lt_70",
          "met": true,
          "value": 40
        },
        {
          "factor": "no_cranial_nerve_palsy",
          "met": true
        }
      ],
      "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": "rule_7s",
      "formula_expression": "low-risk iff headache_days < 7 and csf_mononuclear_percent < 70 and cranial_nerve_palsy is false",
      "rule7s_low_risk": true
    },
    {
      "citation": {
        "authors": "Cohn KA, Thompson AD, Shah SS, Hines EM, Lyons TW, Welsh EJ, Nigrovic LE",
        "doi": "10.1542/peds.2011-1215",
        "id": "cohn-2012",
        "pmid": "22184646",
        "source": "Pediatrics. 2012;129(1):e46-e53",
        "title": "Validation of a clinical prediction rule to distinguish Lyme meningitis from aseptic meningitis"
      },
      "criteria": [
        {
          "factor": "headache_days_lt_7",
          "met": true,
          "value": 3
        },
        {
          "factor": "csf_mononuclear_percent_lt_70",
          "met": true,
          "value": 40
        },
        {
          "factor": "no_cranial_nerve_palsy",
          "met": true
        }
      ],
      "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": "rule_7s",
      "formula_expression": "low-risk iff headache_days < 7 and csf_mononuclear_percent < 70 and cranial_nerve_palsy is false",
      "rule7s_low_risk": true
    }
  ],
  "path": "/api/calc/rule_7s"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.magentlab.com/api/calc/rule_7s' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"cranial_nerve_palsy":false,"csf_mononuclear_percent":40,"headache_days":3},{"cranial_nerve_palsy":false,"csf_mononuclear_percent":40,"headache_days":3}]}'

# 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/rule_7s' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"cranial_nerve_palsy":false,"csf_mononuclear_percent":40,"headache_days":3},{"cranial_nerve_palsy":false,"csf_mononuclear_percent":40,"headache_days":3}]}' \
  | 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%2Frule_7s&method=POST
const res = await pay("https://api.magentlab.com/api/calc/rule_7s", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "cranial_nerve_palsy": false,
        "csf_mononuclear_percent": 40,
        "headache_days": 3
      },
      {
        "cranial_nerve_palsy": false,
        "csf_mononuclear_percent": 40,
        "headache_days": 3
      }
    ]
  }),
});
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/rule_7s",
        json={
            "items": [
                {
                    "cranial_nerve_palsy": False,
                    "csf_mononuclear_percent": 40,
                    "headache_days": 3,
                },
                {
                    "cranial_nerve_palsy": False,
                    "csf_mononuclear_percent": 40,
                    "headache_days": 3,
                },
            ],
        },
    )
    print(res.status_code, res.text)