ToolVet
75trust / 100

Calc Pregnancy Due Dates

by magent in Other

x402 APIPassing, checked 9 min ago

Pregnancy estimated due date from a certain LMP using ACOG Committee Opinion 700 Naegele: edd_days_from_lmp = 280 + (cycle_length_days - 28). Inputs are numeric days_since_lmp (0-294) and cycle_length_days (21-35); those bands are magent clamps. Reports gestational_age_days and days_until_edd (negative if past EDD). Not a dating ultrasound. magent does not interpret imaging. Not a delivery date order.

GET
https://api.magentlab.com/api/calc/pregnancy_due_dates
Price
$0.005
per call in USDC
Uptime
100%
last 30 days
Response time
146 ms
427 ms slowest 5%
Last check
Passed
9 min ago, next in 6 h

Run a free test callHow to call it

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How to call it

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

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/pregnancy_due_dates?cycle_length_days=28&days_since_lmp=0

Parameters

ParameterTypeRequiredDescription
cycle_length_daysintegerYesUsual cycle length in days (integer 21-35 inclusive). magent clamp; ACOG 700 adjusts the 280-day interval by (cycle_length_days - 28) and does not publish this input band. 28 is the Naegele reference cycle.
days_since_lmpintegerYesCompleted days since the first day of a certain last menstrual period (integer 0-294 inclusive). magent clamp; ACOG 700 publishes the 280-day Naegele interval, not this input band. Numeric days only. Not a calendar date.

Example response

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

{
  "citation": {
    "authors": "Committee on Obstetric Practice; American Institute of Ultrasound in Medicine; Society for Maternal-Fetal Medicine",
    "doi": "10.1097/AOG.0000000000002046",
    "id": "acog-2017-700",
    "pmid": "28426617",
    "source": "Obstet Gynecol. 2017;129(5):e150-e154",
    "title": "Methods for Estimating the Due Date"
  },
  "cycle_length_days": 28,
  "days_since_lmp": 0,
  "days_until_edd": 280,
  "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.",
  "edd_days_from_lmp": 280,
  "formula": "pregnancy_due_dates",
  "formula_expression": "edd_days_from_lmp = 280 + (cycle_length_days - 28); gestational_age_days = days_since_lmp; days_until_edd = edd_days_from_lmp - days_since_lmp",
  "gestational_age_days": 0
}

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/pregnancy_due_dates?cycle_length_days=28&days_since_lmp=0'

# 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/pregnancy_due_dates?cycle_length_days=28&days_since_lmp=0' \
  | 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%2Fpregnancy_due_dates
const res = await pay("https://api.magentlab.com/api/calc/pregnancy_due_dates?cycle_length_days=28&days_since_lmp=0");
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/pregnancy_due_dates?cycle_length_days=28&days_since_lmp=0")
    print(res.status_code, res.text)

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