MAGENT

Hematology · LIVE

Lansky Play-Performance Scale

Lansky

Return the Lansky 1987 Play-Performance Scale 0-100 from a caller-assigned integer, with a stable label.

LIVE $0.005 USDC GET /api/calc/lansky

Markdown: /docs/lansky.md · Canonical: https://magentlab.com/docs/lansky

Not a medical device. Not a diagnosis, dose, or listing recommendation.

What it computes

Return the Lansky 1987 Play-Performance Scale 0-100 from a caller-assigned integer, with a stable label.

When to use

When an agent already has a Lansky Play-Performance Scale 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 as in Lansky 1987 (parent-rated play-performance over the past week) and needs the published score and label. magent does not observe the child or assign performance status. Not Karnofsky. Not ECOG.

When not to use

  • Not a medical device and not a performance-status assignment. magent does not observe the child.
  • Lansky 1987 Play-Performance Scale decades 0-100. Grade 0 (unresponsive) is scored. Parent-rated play-performance over the past week. Ages 1-16 in Lansky 1987; the caller assigns lps.
  • Not Karnofsky and not ECOG. The caller assigns lps 0-100. magent does not examine the child.

Formula

Lansky 1987 Play-Performance Scale = caller-assigned integer 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 (Lansky 1987); max 100; grade 0 (unresponsive) is scored

Citation

Title
The measurement of performance in childhood cancer patients
Authors
Lansky SB, List MA, Lansky LL, Ritter-Sterr C, Miller DR
Source
Cancer. 1987;60(7):1651-1656
DOI
10.1002/1097-0142(19871001)60:7<1651::AID-CNCR2820600738>3.0.CO;2-J

Worked example

LPS 100 fully active

Given: lps=100

  1. lps 100 → score 100; max 100; lps 100; fully_active

LPS 0 unresponsive

Given: lps=0

  1. lps 0 → score 0; max 100; lps 0; unresponsive

Also searched as

  • Lansky Play-Performance Scale
  • Lansky score
  • LPS
  • Lansky 1987
  • Play-Performance Scale
  • pediatric play performance
  • Lansky PPS

Try

Opens the live endpoint. Unpaid browser requests show the paywall; agents should send Accept: application/json.

/api/calc/lansky?lps=100

Full URL: https://api.magentlab.com/api/calc/lansky?lps=100

Call

Expect HTTP 402 until you retry with PAYMENT-SIGNATURE. Incomplete query params return HTTP 400 before any quote or charge. 

curl -i -H "Accept: application/json" "https://api.magentlab.com/api/calc/lansky?lps=100"

Parameters

Name Type Required Description
lps integer required Lansky 1987 Play-Performance Scale 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 as assigned by the caller from parent-rated play-performance over the past week (100 fully active, normal; 90 minor restrictions in physically strenuous activity; 80 active, but tires more quickly; 70 greater restriction of play and less time spent in play; 60 up and around, but active play minimal, keeps busy with quieter activities; 50 lying around much of the day, but gets dressed, no active play, participates in all quiet play and activities; 40 mostly in bed, participates in quiet activities; 30 in bed, needs assistance even for quiet play; 20 sleeping often, play entirely limited to very passive activities; 10 does not play, does not get out of bed; 0 unresponsive). Grade 0 (unresponsive) is scored. magent does not observe the child.

Bulk (POST)

POST the same path with a JSON items array. The first item is the GET unit; each additional item is $0.002. Invalid items return HTTP 400 before settlement.

POST /api/calc/lansky Max 25 unit_amount + extra_item_amount * (n - 1) extra $0.002 PREVIEW

  • 1 to 25 items. Each item uses the same keys as the GET query parameters.
  • POST of 1 item costs the same as GET. Lists longer than 25: chunk into multiple POSTs. Extra items still execute; do not pad dummy rows.
  • The first invalid item fails the whole request (index in the 400 JSON). You are not charged.
  • HTTP 200 is {count, path, items}. Each items[i] is the GET 200 body for that row.
  • Catalog misses (empty matches, found=false) stay paid 200s inside that slot.
  • x402 resource URL is this path plus n and body_sha256. Browsers that prefer text/html get the same paywall as GET; Pay retries POST with the same items.

Example request (fixture)

{
  "items": [
    {
      "lps": "100"
    },
    {
      "lps": "100"
    }
  ]
}

Open bulk paywall →

Opens a two-item fixture on the API host. Unpaid browsers get the same MetaMask paywall as GET; Pay retries POST with those items.

Example 200 (fixture)

{
  "count": 2,
  "path": "/api/calc/lansky",
  "items": [
    {
      "components": [
        {
          "factor": "lps",
          "points": 100,
          "present": true
        }
      ],
      "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.",
      "citation": {
        "authors": "Lansky SB, List MA, Lansky LL, Ritter-Sterr C, Miller DR",
        "doi": "10.1002/1097-0142(19871001)60:7<1651::AID-CNCR2820600738>3.0.CO;2-J",
        "id": "lansky-1987",
        "pmid": "3621134",
        "source": "Cancer. 1987;60(7):1651-1656",
        "title": "The measurement of performance in childhood cancer patients"
      },
      "formula": "lansky",
      "formula_expression": "Lansky 1987 Play-Performance Scale = caller-assigned integer 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 (Lansky 1987); max 100; grade 0 (unresponsive) is scored",
      "max_score": 100,
      "score": 100,
      "lps": 100,
      "lps_label": "fully_active"
    },
    {
      "components": [
        {
          "factor": "lps",
          "points": 100,
          "present": true
        }
      ],
      "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.",
      "citation": {
        "authors": "Lansky SB, List MA, Lansky LL, Ritter-Sterr C, Miller DR",
        "doi": "10.1002/1097-0142(19871001)60:7<1651::AID-CNCR2820600738>3.0.CO;2-J",
        "id": "lansky-1987",
        "pmid": "3621134",
        "source": "Cancer. 1987;60(7):1651-1656",
        "title": "The measurement of performance in childhood cancer patients"
      },
      "formula": "lansky",
      "formula_expression": "Lansky 1987 Play-Performance Scale = caller-assigned integer 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 (Lansky 1987); max 100; grade 0 (unresponsive) is scored",
      "max_score": 100,
      "score": 100,
      "lps": 100,
      "lps_label": "fully_active"
    }
  ]
}

Response

Field Type Description
formula string lansky
formula_expression string Published Lansky decade rule
score integer Same as lps (0-100 by tens)
max_score integer 100
lps integer Caller-assigned Lansky 1987 Play-Performance Scale 0-100 by tens
lps_label string Stable token for that decade: fully_active, minor_restriction, active_tires, restricted_play, quiet_activities, lying_around, mostly_in_bed, bedbound, often_sleeping, no_play, or unresponsive
components array lps component
citation object Lansky 1987
disclaimer string Not a medical device

Example JSON

Machine form of the same example. Frozen fixture. Not a live lookup. 

{
  "components": [
    {
      "factor": "lps",
      "points": 100,
      "present": true
    }
  ],
  "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.",
  "citation": {
    "authors": "Lansky SB, List MA, Lansky LL, Ritter-Sterr C, Miller DR",
    "doi": "10.1002/1097-0142(19871001)60:7<1651::AID-CNCR2820600738>3.0.CO;2-J",
    "id": "lansky-1987",
    "pmid": "3621134",
    "source": "Cancer. 1987;60(7):1651-1656",
    "title": "The measurement of performance in childhood cancer patients"
  },
  "formula": "lansky",
  "formula_expression": "Lansky 1987 Play-Performance Scale = caller-assigned integer 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 (Lansky 1987); max 100; grade 0 (unresponsive) is scored",
  "max_score": 100,
  "score": 100,
  "lps": 100,
  "lps_label": "fully_active"
}

Client errors (HTTP 400)

Invalid params return 400 without charge. Shared HTTP 402 and 503 meanings: Payments.

HTTP Code When
400 invalid_lansky lps must be 0, 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 (Lansky 1987). Grade 0 (unresponsive) is scored. Returned before settlement; you are not charged.
400 invalid_items POST body must be a JSON object with only an items array Returned before settlement; you are not charged.
400 invalid_item_count items must be an array of 1 to 25 objects Returned before settlement; you are not charged.
400 invalid_item each items entry must be a JSON object Returned before settlement; you are not charged.

Related tools

  • Karnofsky — Return the Karnofsky 1949 Performance Status 10-100 from a caller-assigned integer, with a stable label.

Payment

Unpaid requests return HTTP 402 even if query parameters or POST items are missing or invalid, so CDP and agents can index the path. After a PAYMENT-SIGNATURE, invalid params return HTTP 400 JSON before settlement. magent does not charge. Fix the params, then request a new 402 quote for that complete URL. Catalog misses (empty matches, found=false) are valid paid 200s. Unpaid valid requests return HTTP 402 with a base64 PAYMENT-REQUIRED header. HTTP 503 is not a new quote: retry the same PAYMENT-SIGNATURE. Full handshake and shared payment errors: Payments. Stdio MCP: /docs/mcp.

Guarantees

  • HTTP 402 is unpaid, including a missing query. After PAYMENT-SIGNATURE, invalid parameters return HTTP 400 before settlement. You are not charged. HTTP 402 never includes the tool JSON.
  • exact: settlement finishes before the tool (paymentFlow upfront). batch-settlement: verify/deposit before the tool; chargedCumulativeAmount commits after HTTP 2xx. Uncertain or failed settlement fails closed (HTTP 503). Retry the same PAYMENT-SIGNATURE.
  • HTTP 402 is unpaid only. Do not sign a second authorization because of a 503.
  • Execution is timeout-bounded and concurrency-capped.
  • Calculator inputs are stored encrypted for allowlisted operators (Magent Console). They are not in public logs, SSH lookups, catalog, or rollups. Request logs store path without query.