Infection / VTE · LIVE

Classic Kawasaki disease criteria

Kawasaki

Apply McCrindle 2017 classic/complete Kawasaki disease criteria and return complete or not_complete from fever_days and five caller-assigned principal features.

LIVE $0.005 USDC GET /api/calc/kawasaki

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

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

What it computes

Apply McCrindle 2017 classic/complete Kawasaki disease criteria and return complete or not_complete from fever_days and five caller-assigned principal features.

When to use

When an agent already has fever duration in days and the five principal clinical features as assigned by the caller and needs the published classic/complete Kawasaki classification. magent does not examine the patient or read an echocardiogram.

When not to use

• Not a medical device and not a diagnosis of Kawasaki disease.
• This tool is classic/complete Kawasaki disease criteria from McCrindle 2017 only. It is not the incomplete-KD laboratory or echocardiogram workup.
• magent does not examine the patient or read an echocardiogram. The caller assigns fever_days and the five principal features as already determined.
• The rare 3-day fever clinician exception in the statement is not implemented. Fever of 3 days is not_complete even with all 5 principal features.

Formula

complete iff principal_feature_count >= 4 and fever_days >= 4 (McCrindle 2017; classic KD with fever_days >= 5 and >=4 features, or 4 days of fever when >=4 principal features). principal_feature_count is the number of true flags among oral_mucosal_changes, bilateral_conjunctival_injection, rash, extremity_changes, cervical_lymphadenopathy. Not incomplete-KD labs/echo. Not the 3-day clinician exception

Citation

Title

Diagnosis, Treatment, and Long-Term Management of Kawasaki Disease: A Scientific Statement for Health Professionals From the American Heart Association

Authors

McCrindle BW, Rowley AH, Newburger JW, Burns JC, Bolger AF, Gewitz M, Baker AL, Jackson MA, Takahashi M, Shah PB, Kobayashi T, Wu MH, Saji TT, Pahl E

Source

Circulation. 2017;135(17):e927-e999

DOI

10.1161/CIR.0000000000000484

Worked example

Also searched as

• Kawasaki disease
• classic Kawasaki
• complete Kawasaki disease
• KD diagnostic criteria
• AHA Kawasaki 2017
• mucocutaneous lymph node syndrome
• Kawasaki fever criteria
• principal features Kawasaki
• McCrindle Kawasaki

Try

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

/api/calc/kawasaki?fever_days=5&oral_mucosal_changes=true&bilateral_conjunctival_injection=true&rash=true&extremity_changes=true&cervical_lymphadenopathy=true

Full URL: https://api.magentlab.com/api/calc/kawasaki?fever_days=5&oral_mucosal_changes=true&bilateral_conjunctival_injection=true&rash=true&extremity_changes=true&cervical_lymphadenopathy=true

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/kawasaki?fever_days=5&oral_mucosal_changes=true&bilateral_conjunctival_injection=true&rash=true&extremity_changes=true&cervical_lymphadenopathy=true"

Parameters

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/kawasaki 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": [
    {
      "bilateral_conjunctival_injection": "true",
      "cervical_lymphadenopathy": "true",
      "extremity_changes": "true",
      "fever_days": "5",
      "oral_mucosal_changes": "true",
      "rash": "true"
    },
    {
      "bilateral_conjunctival_injection": "true",
      "cervical_lymphadenopathy": "true",
      "extremity_changes": "true",
      "fever_days": "5",
      "oral_mucosal_changes": "true",
      "rash": "true"
    }
  ]
}

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/kawasaki",
  "items": [
    {
      "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": "McCrindle BW, Rowley AH, Newburger JW, Burns JC, Bolger AF, Gewitz M, Baker AL, Jackson MA, Takahashi M, Shah PB, Kobayashi T, Wu MH, Saji TT, Pahl E",
        "doi": "10.1161/CIR.0000000000000484",
        "id": "mccrindle-2017",
        "pmid": "28356445",
        "source": "Circulation. 2017;135(17):e927-e999",
        "title": "Diagnosis, Treatment, and Long-Term Management of Kawasaki Disease: A Scientific Statement for Health Professionals From the American Heart Association"
      },
      "formula": "kawasaki",
      "formula_expression": "complete iff principal_feature_count >= 4 and fever_days >= 4 (McCrindle 2017; classic KD with fever_days >= 5 and >=4 features, or 4 days of fever when >=4 principal features). principal_feature_count is the number of true flags among oral_mucosal_changes, bilateral_conjunctival_injection, rash, extremity_changes, cervical_lymphadenopathy. Not incomplete-KD labs/echo. Not the 3-day clinician exception",
      "criteria": [
        {
          "value": 5,
          "factor": "fever_days_ge_4",
          "met": true
        },
        {
          "factor": "oral_mucosal_changes",
          "met": true
        },
        {
          "factor": "bilateral_conjunctival_injection",
          "met": true
        },
        {
          "factor": "rash",
          "met": true
        },
        {
          "factor": "extremity_changes",
          "met": true
        },
        {
          "factor": "cervical_lymphadenopathy",
          "met": true
        },
        {
          "value": 5,
          "factor": "principal_feature_count_ge_4",
          "met": true
        }
      ],
      "classification": "complete",
      "bilateral_conjunctival_injection": true,
      "cervical_lymphadenopathy": true,
      "extremity_changes": true,
      "fever_days": 5,
      "oral_mucosal_changes": true,
      "principal_feature_count": 5,
      "rash": 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": "McCrindle BW, Rowley AH, Newburger JW, Burns JC, Bolger AF, Gewitz M, Baker AL, Jackson MA, Takahashi M, Shah PB, Kobayashi T, Wu MH, Saji TT, Pahl E",
        "doi": "10.1161/CIR.0000000000000484",
        "id": "mccrindle-2017",
        "pmid": "28356445",
        "source": "Circulation. 2017;135(17):e927-e999",
        "title": "Diagnosis, Treatment, and Long-Term Management of Kawasaki Disease: A Scientific Statement for Health Professionals From the American Heart Association"
      },
      "formula": "kawasaki",
      "formula_expression": "complete iff principal_feature_count >= 4 and fever_days >= 4 (McCrindle 2017; classic KD with fever_days >= 5 and >=4 features, or 4 days of fever when >=4 principal features). principal_feature_count is the number of true flags among oral_mucosal_changes, bilateral_conjunctival_injection, rash, extremity_changes, cervical_lymphadenopathy. Not incomplete-KD labs/echo. Not the 3-day clinician exception",
      "criteria": [
        {
          "value": 5,
          "factor": "fever_days_ge_4",
          "met": true
        },
        {
          "factor": "oral_mucosal_changes",
          "met": true
        },
        {
          "factor": "bilateral_conjunctival_injection",
          "met": true
        },
        {
          "factor": "rash",
          "met": true
        },
        {
          "factor": "extremity_changes",
          "met": true
        },
        {
          "factor": "cervical_lymphadenopathy",
          "met": true
        },
        {
          "value": 5,
          "factor": "principal_feature_count_ge_4",
          "met": true
        }
      ],
      "classification": "complete",
      "bilateral_conjunctival_injection": true,
      "cervical_lymphadenopathy": true,
      "extremity_changes": true,
      "fever_days": 5,
      "oral_mucosal_changes": true,
      "principal_feature_count": 5,
      "rash": true
    }
  ]
}

Response

Example JSON

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

{
  "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": "McCrindle BW, Rowley AH, Newburger JW, Burns JC, Bolger AF, Gewitz M, Baker AL, Jackson MA, Takahashi M, Shah PB, Kobayashi T, Wu MH, Saji TT, Pahl E",
    "doi": "10.1161/CIR.0000000000000484",
    "id": "mccrindle-2017",
    "pmid": "28356445",
    "source": "Circulation. 2017;135(17):e927-e999",
    "title": "Diagnosis, Treatment, and Long-Term Management of Kawasaki Disease: A Scientific Statement for Health Professionals From the American Heart Association"
  },
  "formula": "kawasaki",
  "formula_expression": "complete iff principal_feature_count >= 4 and fever_days >= 4 (McCrindle 2017; classic KD with fever_days >= 5 and >=4 features, or 4 days of fever when >=4 principal features). principal_feature_count is the number of true flags among oral_mucosal_changes, bilateral_conjunctival_injection, rash, extremity_changes, cervical_lymphadenopathy. Not incomplete-KD labs/echo. Not the 3-day clinician exception",
  "criteria": [
    {
      "value": 5,
      "factor": "fever_days_ge_4",
      "met": true
    },
    {
      "factor": "oral_mucosal_changes",
      "met": true
    },
    {
      "factor": "bilateral_conjunctival_injection",
      "met": true
    },
    {
      "factor": "rash",
      "met": true
    },
    {
      "factor": "extremity_changes",
      "met": true
    },
    {
      "factor": "cervical_lymphadenopathy",
      "met": true
    },
    {
      "value": 5,
      "factor": "principal_feature_count_ge_4",
      "met": true
    }
  ],
  "classification": "complete",
  "bilateral_conjunctival_injection": true,
  "cervical_lymphadenopathy": true,
  "extremity_changes": true,
  "fever_days": 5,
  "oral_mucosal_changes": true,
  "principal_feature_count": 5,
  "rash": true
}

Client errors (HTTP 400)

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

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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.