ToolVet
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Calc Steroid Conversion

by magent in Documents & files

x402 APIPassing, checked 2 h ago

Convert a glucocorticoid milligram dose among hydrocortisone, prednisone, and dexamethasone using Meikle 1977 equivalent doses (20 : 5 : 0.75). Not a taper, stress-dose protocol, or regimen recommendation; mineralocorticoid activity is not converted. Deterministic published table with citation.

GET
https://api.magentlab.com/api/calc/steroid_conversion
Price
$0.005
per call in USDC
Uptime
100%
last 30 days
Response time
212 ms
562 ms slowest 5%
Last check
Passed
2 h ago, next in 4 h

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How to call it

GET https://api.magentlab.com/api/calc/steroid_conversion

Each call costs $0.005 in USDC on Base, paid with the request over x402.

Run a free test callOne unpaid request, the way an agent sends it. You see the payment challenge it gets back. Nothing is charged.

Example request

From the listing.

GET https://api.magentlab.com/api/calc/steroid_conversion?dose_mg=20&from=hydrocortisone&to=prednisone

Parameters

ParameterTypeRequiredDescription
dose_mgnumberYesDose of the source glucocorticoid in milligrams (0.1-5000).
fromstringYesSource glucocorticoid. hydrocortisone, prednisone, or dexamethasone (Meikle 1977). One of: hydrocortisone, prednisone, dexamethasone.
tostringYesTarget glucocorticoid. hydrocortisone, prednisone, or dexamethasone (Meikle 1977). One of: hydrocortisone, prednisone, dexamethasone.

Example response

The provider's example. We can't check it without paying.

{
  "citation": {
    "authors": "Meikle AW, Tyler FH",
    "doi": "10.1016/0002-9343(77)90233-9",
    "id": "meikle-1977",
    "source": "Am J Med. 1977;63(2):200-207",
    "title": "Potency and duration of action of glucocorticoids. Effects of hydrocortisone, prednisone and dexamethasone on human pituitary-adrenal function"
  },
  "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.",
  "dose_mg": 20,
  "equivalent_dose_mg": 5,
  "formula": "steroid_conversion",
  "formula_expression": "equivalent_dose_mg = dose_mg * (to_equivalent_mg / from_equivalent_mg); hydrocortisone 20 mg = prednisone 5 mg = dexamethasone 0.75 mg (Meikle 1977)",
  "from": "hydrocortisone",
  "from_equivalent_mg": 20,
  "to": "prednisone",
  "to_equivalent_mg": 5
}

Call it from code

The curl command shows the payment challenge. The JavaScript and Python versions pay and call, and never pay more than $0.005.

curl: see the payment challenge
# bash or zsh: see the payment challenge. Nothing is charged.
curl -sS -g -i 'https://api.magentlab.com/api/calc/steroid_conversion?dose_mg=20&from=hydrocortisone&to=prednisone'

# 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 - 'https://api.magentlab.com/api/calc/steroid_conversion?dose_mg=20&from=hydrocortisone&to=prednisone' \
  | grep -i '^payment-required:' | cut -d' ' -f2 | tr -d '\r' | base64 --decode
JavaScript: pay and call
// 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%2Fsteroid_conversion
const res = await pay("https://api.magentlab.com/api/calc/steroid_conversion?dose_mg=20&from=hydrocortisone&to=prednisone");
console.log(res.status, await res.text());
Python: pay and call
# 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.get("https://api.magentlab.com/api/calc/steroid_conversion?dose_mg=20&from=hydrocortisone&to=prednisone")
    print(res.status_code, res.text)

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Recent checks

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2 h agoPassed402151 ms$0.005
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2 days agoPassed402148 ms$0.005
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