ForHosting KIT · Developer Utilities

SNAP-II neonatal score

SNAP-II, the Score for Neonatal Acute Physiology II, summarises how ill a newborn is from the worst values recorded during the first twelve hours after admission.

● BetaFree · in your browser

Run — free How it works & API

Use it from WebAPIEmailTelegramApp soon

This calculator applies the six published 2001 items: lowest mean blood pressure, lowest temperature, lowest PaO2/FiO2 ratio, lowest serum pH, whether multiple seizures occurred, and urine output in millilitres per kilogram per hour. It returns the integer SNAP-II total from zero to one hundred and fifteen, plus a per-item point breakdown you can pin in tests. Negative urine output is rejected as invalid_input because a flow rate cannot be negative. The same pure table lookup powers the free browser widget and the prepaid API, so teaching labs and electronic worksheets never disagree. Successful API items cost $0.002. This is an educational physiology score, not a diagnosis and not a substitute for a neonatologist.

How to use it

Enter your values in the form above. The tool checks them before calculating and shows the result on the same page.

Check your inputs

Use the labels and units shown next to each field. If something is missing or outside the allowed range, the page points to the field to fix.

Use it again or automate it

Use the browser tool for individual checks and the API when you need the same capability in an automated workflow.

What you can do with it

Get an answer now

Enter one set of values and see the result without building a spreadsheet or script.

Compare scenarios

Change one value at a time and rerun the calculation to understand what affects the result.

Automate repeated work

Use the API when the same calculation needs to run inside your product or workflow.

FAQ

How is the SNAP-II score calculated?

SNAP-II adds published points from six worst first-12-hour items: mean blood pressure, temperature, PaO2/FiO2, serum pH, multiple seizures, and urine output (mL/kg/h). The integer total runs from 0 to 115.

What PaO2/FiO2 ratio does SNAP-II use?

Send PaO2 in mmHg divided by FiO2 as a percent (21–100), not the adult ARDS mmHg scale. Example: PaO2 60 mmHg on 40% oxygen is 60/40 = 1.5, which scores 5 points.

What happens if urine output is negative?

The request fails with invalid_input stating that urine_output cannot be negative. A flow rate in mL/kg/h cannot be below zero, and that failure is not billed.

Does this calculator include SNAPPE-II or estimate mortality?

No. It returns the six-item SNAP-II physiology score only. It does not add birth weight, Apgar, or small-for-gestational-age points, and it does not output a mortality percentage.

Is this a diagnosis, and what does the SNAP-II calculator cost?

No. It is an educational physiology score, not a medical device. The browser tool runs free on your device. API calls use prepaid KIT balance at $0.002 per successful item; validation failures are not charged.

For developers — API access

Everything on this page is available programmatically. This section is for teams who want to wire it into their own systems; everyone else can just use the tool above.

API endpoint

POSThttps://api.kit.forhosting.com/health/snap-score

Prefer to automate it? One authenticated POST creates the task; the result comes back by webhook or a signed link. The same capability also runs here on the web, by email and from Telegram — and soon from our app too.

Call it from your stack

curl -X POST https://api.kit.forhosting.com/health/snap-score \
  -H "Authorization: Bearer $KIT_KEY" \
  -H "Content-Type: application/json" \
  -d '{"items":["valor-1","valor-2"]}'

const res = await fetch("https://api.kit.forhosting.com/health/snap-score", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${process.env.KIT_KEY}`,
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
    "items": [
      "valor-1",
      "valor-2"
    ]
  })
});
const { task_id } = await res.json();

import os, requests

res = requests.post(
    "https://api.kit.forhosting.com/health/snap-score",
    headers={"Authorization": f"Bearer {os.environ['KIT_KEY']}"},
    json={
    "items": [
        "valor-1",
        "valor-2"
    ]
},
)
task_id = res.json()["task_id"]

<?php
$res = file_get_contents("https://api.kit.forhosting.com/health/snap-score", false, stream_context_create([
  "http" => [
    "method"  => "POST",
    "header"  => "Authorization: Bearer " . getenv("KIT_KEY") . "\r\nContent-Type: application/json",
    "content" => '{"items":["valor-1","valor-2"]}',
  ],
]));
$task = json_decode($res, true);

body := bytes.NewBufferString(`{"items":["valor-1","valor-2"]}`)
req, _ := http.NewRequest("POST", "https://api.kit.forhosting.com/health/snap-score", body)
req.Header.Set("Authorization", "Bearer "+os.Getenv("KIT_KEY"))
req.Header.Set("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)

Example request

{
  "items": [
    "valor-1",
    "valor-2"
  ]
}

Example response

{
  "task_id": "tsk_a1b2c3d4e5f6a1b2c3d4e5f6",
  "type": "health.snap_score",
  "status": "queued",
  "_links": {
    "result": "/tasks/tsk_…/result"
  }
}

The API is asynchronous: the call returns a task_id immediately and the result arrives by webhook. Polling is capped at 1 req/s per task.

Pricing

Per request$0.002

Published price — no tokens, no invented credits. A failed task is never charged.

Errors

HTTP	Code	Meaning
`401`	`unauthorized`	Missing or invalid API key.
`402`	`insufficient_balance`	Your balance doesn't cover the task price.
`404`	`unknown_type`	That task type doesn't exist.
`429`	`rate_limited`	Too many requests. Use the webhook instead of polling.

Read the full KIT documentation →