Hematology · LIVE

Karnofsky Performance Status (KPS)

Karnofsky

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

LIVE $0.005 USDC GET /api/calc/karnofsky

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

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

What it computes

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

When to use

When an agent already has a Karnofsky Performance Status 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 as in Karnofsky 1949 and needs the published score and label. magent does not observe the patient or assign performance status. Not ECOG.

When not to use

Not a medical device and not a performance-status assignment. magent does not observe the patient.
Karnofsky 1949 decades 10-100 only. Grade 0 (dead) is not scored.
The caller assigns kps 10-100. magent does not examine the patient or convert ECOG grades.

Formula

Karnofsky Performance Status = caller-assigned integer 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 (Karnofsky 1949); max 100; grade 0 (dead) is not scored

Citation

Title: The clinical evaluation of chemotherapeutic agents in cancer
Authors: Karnofsky DA, Burchenal JH
Source: In: MacLeod CM, ed. Evaluation of Chemotherapeutic Agents. New York: Columbia University Press; 1949:191-205
DOI: none

Worked example

KPS 100 normal

Given: kps=100

kps 100 → score 100; max 100; kps 100; normal

KPS 10 moribund

Given: kps=10

kps 10 → score 10; max 100; kps 10; moribund

Also searched as

Karnofsky Performance Status
KPS
Karnofsky score
Karnofsky 1949
Karnofsky scale
performance status 10-100
KPS 10-100

Try

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

/api/calc/karnofsky?kps=100

Full URL: https://api.magentlab.com/api/calc/karnofsky?kps=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/karnofsky?kps=100"

Parameters

Name	Type	Required	Description
`kps`	integer	required	Karnofsky 1949 Performance Status 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 as assigned by the caller (100 normal, no complaints; 90 minor signs or symptoms, normal activity; 80 normal activity with effort; 70 cares for self; 60 occasional assistance; 50 considerable assistance and frequent medical care; 40 disabled; 30 severely disabled; 20 very sick, hospital admission necessary; 10 moribund). Grade 0 (dead) is not scored. magent does not observe the patient.

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/karnofsky 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": [
    {
      "kps": "100"
    },
    {
      "kps": "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/karnofsky",
  "items": [
    {
      "components": [
        {
          "factor": "kps",
          "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": "Karnofsky DA, Burchenal JH",
        "id": "karnofsky-1949",
        "source": "In: MacLeod CM, ed. Evaluation of Chemotherapeutic Agents. New York: Columbia University Press; 1949:191-205",
        "title": "The clinical evaluation of chemotherapeutic agents in cancer"
      },
      "formula": "karnofsky",
      "formula_expression": "Karnofsky Performance Status = caller-assigned integer 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 (Karnofsky 1949); max 100; grade 0 (dead) is not scored",
      "max_score": 100,
      "score": 100,
      "kps": 100,
      "kps_label": "normal"
    },
    {
      "components": [
        {
          "factor": "kps",
          "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": "Karnofsky DA, Burchenal JH",
        "id": "karnofsky-1949",
        "source": "In: MacLeod CM, ed. Evaluation of Chemotherapeutic Agents. New York: Columbia University Press; 1949:191-205",
        "title": "The clinical evaluation of chemotherapeutic agents in cancer"
      },
      "formula": "karnofsky",
      "formula_expression": "Karnofsky Performance Status = caller-assigned integer 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 (Karnofsky 1949); max 100; grade 0 (dead) is not scored",
      "max_score": 100,
      "score": 100,
      "kps": 100,
      "kps_label": "normal"
    }
  ]
}

Response

Field	Type	Description
`formula`	string	karnofsky
`formula_expression`	string	Published Karnofsky decade rule
`score`	integer	Same as kps (10-100 by tens)
`max_score`	integer	100
`kps`	integer	Caller-assigned Karnofsky 1949 Performance Status 10-100 by tens
`kps_label`	string	Stable token for that decade: normal, minor_symptoms, effort, selfcare, occasional_assistance, considerable_assistance, disabled, severely_disabled, very_sick, or moribund
`components`	array	kps component
`citation`	object	Karnofsky 1949
`disclaimer`	string	Not a medical device

Example JSON

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

{
  "components": [
    {
      "factor": "kps",
      "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": "Karnofsky DA, Burchenal JH",
    "id": "karnofsky-1949",
    "source": "In: MacLeod CM, ed. Evaluation of Chemotherapeutic Agents. New York: Columbia University Press; 1949:191-205",
    "title": "The clinical evaluation of chemotherapeutic agents in cancer"
  },
  "formula": "karnofsky",
  "formula_expression": "Karnofsky Performance Status = caller-assigned integer 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 (Karnofsky 1949); max 100; grade 0 (dead) is not scored",
  "max_score": 100,
  "score": 100,
  "kps": 100,
  "kps_label": "normal"
}

Client errors (HTTP 400)

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

HTTP	Code	When
400	`invalid_karnofsky`	kps must be 10, 20, 30, 40, 50, 60, 70, 80, 90, or 100 (Karnofsky 1949). Grade 0 (dead) is not 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

ECOG — Return the Oken 1982 ECOG performance status grade 0-4 from a caller-assigned integer, with a stable label.
IPI — Sum the Shipp 1993 five-factor International Prognostic Index (all ages) and return low (0–1), low_intermediate (2), high_intermediate (3), or high (4–5).

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.