Calc Psad

{
  "count": 2,
  "items": [
    {
      "benson_band": ">=0.10",
      "citation": {
        "authors": "Benson MC, Whang IS, Pantuck A, Ring K, Kaplan SA, Olsson CA, Cooner WH",
        "doi": "10.1016/s0022-5347(17)37393-7",
        "id": "benson-1992-psad",
        "pmid": "1371554",
        "source": "J Urol. 1992;147(3 Pt 2):815-816",
        "title": "Prostate specific antigen density: a means of distinguishing benign prostatic hypertrophy and prostate cancer"
      },
      "depth_cm": 4,
      "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": "psad",
      "formula_expression": "volume_ml = length_cm × width_cm × depth_cm × 0.5 (Benson: D1×D2×D3×1/2, not π/6); psad = psa_ng_ml / volume_ml",
      "length_cm": 4,
      "prostate_volume_ml": 32,
      "psa_ng_ml": 4,
      "psad": 0.125,
      "width_cm": 4
    },
    {
      "benson_band": ">=0.10",
      "citation": {
        "authors": "Benson MC, Whang IS, Pantuck A, Ring K, Kaplan SA, Olsson CA, Cooner WH",
        "doi": "10.1016/s0022-5347(17)37393-7",
        "id": "benson-1992-psad",
        "pmid": "1371554",
        "source": "J Urol. 1992;147(3 Pt 2):815-816",
        "title": "Prostate specific antigen density: a means of distinguishing benign prostatic hypertrophy and prostate cancer"
      },
      "depth_cm": 4,
      "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": "psad",
      "formula_expression": "volume_ml = length_cm × width_cm × depth_cm × 0.5 (Benson: D1×D2×D3×1/2, not π/6); psad = psa_ng_ml / volume_ml",
      "length_cm": 4,
      "prostate_volume_ml": 32,
      "psa_ng_ml": 4,
      "psad": 0.125,
      "width_cm": 4
    }
  ],
  "path": "/api/calc/psad"
}

# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i -X POST 'https://api.magentlab.com/api/calc/psad' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"depth_cm":4,"length_cm":4,"prostate_volume_ml":40,"psa_ng_ml":4,"width_cm":4},{"depth_cm":4,"length_cm":4,"prostate_volume_ml":40,"psa_ng_ml":4,"width_cm":4}]}'

# 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/psad' \
  -H 'content-type: application/json' \
  --data-raw '{"items":[{"depth_cm":4,"length_cm":4,"prostate_volume_ml":40,"psa_ng_ml":4,"width_cm":4},{"depth_cm":4,"length_cm":4,"prostate_volume_ml":40,"psa_ng_ml":4,"width_cm":4}]}' \
  | 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 $0.005 per call.
const client = new x402Client().setSpendControls({ maxAmountPerPayment: "$0.005" });
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 $0.005 per payment. GET https://toolvet.app/api/v1/check?url=https%3A%2F%2Fapi.magentlab.com%2Fapi%2Fcalc%2Fpsad&method=POST
const res = await pay("https://api.magentlab.com/api/calc/psad", {
  method: "POST",
  headers: { "content-type": "application/json" },
  body: JSON.stringify({
    "items": [
      {
        "depth_cm": 4,
        "length_cm": 4,
        "prostate_volume_ml": 40,
        "psa_ng_ml": 4,
        "width_cm": 4
      },
      {
        "depth_cm": 4,
        "length_cm": 4,
        "prostate_volume_ml": 40,
        "psa_ng_ml": 4,
        "width_cm": 4
      }
    ]
  }),
});
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 $0.005 per call.
client = x402ClientSync().set_spend_controls({"max_amount_per_payment": "$0.005"})
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/psad",
        json={
            "items": [
                {
                    "depth_cm": 4,
                    "length_cm": 4,
                    "prostate_volume_ml": 40,
                    "psa_ng_ml": 4,
                    "width_cm": 4,
                },
                {
                    "depth_cm": 4,
                    "length_cm": 4,
                    "prostate_volume_ml": 40,
                    "psa_ng_ml": 4,
                    "width_cm": 4,
                },
            ],
        },
    )
    print(res.status_code, res.text)