ToolVet
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Calc Reticulocyte Index

by magent in Other

x402 APIPassing, checked 8 h ago

Corrected reticulocyte count (retic% × Hct/45), Hillman 1969 maturation-shift reticulocyte index, and optional absolute reticulocyte count. Deterministic published arithmetic with citation; not a marrow diagnosis.

GET
https://api.magentlab.com/api/calc/reticulocyte_index
Price
$0.005
per call in USDC
Uptime
90.9%
last 30 days
Response time
215 ms
569 ms slowest 5%
Last check
Passed
8 h ago, next any minute now

Run a free test callHow to call it

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How to call it

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

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/reticulocyte_index?hematocrit_percent=45&rbc_million_ul=5&reticulocyte_percent=2

Parameters

ParameterTypeRequiredDescription
hematocrit_percentnumberYesHematocrit as a percent (10-70). CRC uses Hct/45. Maturation days: ≥40 → 1.0; ≥30 → 1.5; ≥20 → 2.0; else 2.5 (Hillman 1969 shift discretized).
rbc_million_ulnumberNoRBC count in 10^6/µL (1.0-8.0). When provided, ARC_per_uL is returned. Omitted omits ARC.
reticulocyte_percentnumberYesReticulocyte percent of RBC (0.1-30).

Example response

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

{
  "arc_per_ul": 100000,
  "citation": {
    "authors": "Hillman RS",
    "doi": "10.1172/JCI106002",
    "id": "hillman-1969",
    "source": "J Clin Invest. 1969;48(3):443-453",
    "title": "Characteristics of marrow production and reticulocyte maturation in normal man in response to anemia"
  },
  "corrected_reticulocyte_percent": 2,
  "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": "reticulocyte_index",
  "formula_expression": "CRC = reticulocyte_percent * (hematocrit_percent / 45); RI = CRC / maturation_days; ARC_per_uL = reticulocyte_percent/100 * rbc_million_ul * 1e6 when RBC is given",
  "hematocrit_percent": 45,
  "maturation_days": 1,
  "reticulocyte_index": 2,
  "reticulocyte_percent": 2
}

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/reticulocyte_index?hematocrit_percent=45&rbc_million_ul=5&reticulocyte_percent=2'

# 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/reticulocyte_index?hematocrit_percent=45&rbc_million_ul=5&reticulocyte_percent=2' \
  | 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%2Freticulocyte_index
const res = await pay("https://api.magentlab.com/api/calc/reticulocyte_index?hematocrit_percent=45&rbc_million_ul=5&reticulocyte_percent=2");
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/reticulocyte_index?hematocrit_percent=45&rbc_million_ul=5&reticulocyte_percent=2")
    print(res.status_code, res.text)

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