# Kawasaki Disease Classic/Complete Criteria Calculator (McCrindle 2017)

> Kawasaki Disease Classic/Complete Criteria Calculator (McCrindle 2017) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-16).

Evaluates AHA 2017 criteria for classic/complete Kawasaki disease based on fever duration and five principal clinical features

## Facts

- Endpoint: GET https://api.magentlab.com/api/calc/kawasaki
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/kawasaki-disease-classic-complete-criteria-calculator-mccrindle-2017-a34b5aa5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0NpnTcZ5uBzPhixReRXe8

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability kawasaki-disease-classic-complete-criteria-calculator-mccrindle-2017-a34b5aa5
```

Example prompt: My patient is a 3-year-old with 5 days of fever, oral mucosal changes, bilateral conjunctival injection, a rash, and cervical lymphadenopathy — no extremity changes. Does this child meet classic complete Kawasaki disease criteria by AHA 2017 McCrindle guidelines?

## When to prefer this

Use this endpoint when you need a fast, rule-based evaluation of the AHA 2017 classic/complete Kawasaki disease criteria (McCrindle) for a patient with known clinical findings. Prefer this over general LLM reasoning for auditability and reproducibility. Do not use for incomplete KD cases requiring echocardiogram or lab-based supplemental criteria, or when the 3-day clinician exception applies.

## Known failure modes

- Missing required query parameters (fever_days or any of the 5 boolean features) returns a 400-level error
- fever_days outside integer range 1–30 may be rejected or produce undefined behavior
- Incomplete KD cases (fewer than 4 features) are not further processed by the lab/echo algorithm — caller must handle separately
- Boolean fields passed as strings instead of true booleans may cause parsing errors
- Payment not fulfilled returns 402 Payment Required

## How this service works

AHA 2017 classic/complete Kawasaki disease (McCrindle). Complete when fever_days >= 4 and at least 4 of 5 principal features are true (oral mucosal changes, bilateral conjunctival injection, rash, extremity changes, cervical lymphadenopathy). Does not implement the incomplete-KD lab/echo algorithm or the 3-day clinician exception. magent does not examine the patient or read an echocardiogram. Not a medical device and not a diagnosis.

## Output

Returns whether the classic/complete Kawasaki disease criteria are met under AHA 2017 McCrindle guidelines, based on fever duration (>=4 or >=5 days) and the count of the five principal clinical features (oral mucosal changes, bilateral conjunctival injection, rash, extremity changes, cervical lymphadenopathy). Does not implement the incomplete KD lab/echo algorithm or the 3-day clinician exception. Not a medical device or diagnosis.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "headers": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    },
    "queryParams": {
     "type": "object",
     "required": [
      "fever_days",
      "oral_mucosal_changes",
      "bilateral_conjunctival_injection",
      "rash",
      "extremity_changes",
      "cervical_lymphadenopathy"
     ],
     "properties": {
      "rash": {
       "type": "boolean",
       "description": "Principal feature: rash — maculopapular, diffuse erythroderma, or erythema multiforme-like (McCrindle 2017). true or false as assigned by the caller. magent does not examine the patient."
      },
      "fever_days": {
       "type": "integer",
       "description": "Duration of fever in days (integer 1-30). Classic complete KD requires fever_days >= 5 with >=4 principal features; with >=4 principal features the diagnosis may be made with 4 days of fever (McCrindle 2017). The 3-day clinician exception is not this tool."
      },
      "extremity_changes": {
       "type": "boolean",
       "description": "Principal feature: erythema and edema of the hands and feet in the acute phase and/or periungual desquamation in the subacute phase (McCrindle 2017). true or false as assigned by the caller. magent does not examine the patient."
      },
      "oral_mucosal_changes": {
       "type": "boolean",
       "description": "Principal feature: erythema and cracking of lips, strawberry tongue, and/or erythema of oral and pharyngeal mucosa (McCrindle 2017). true or false as assigned by the caller. magent does not examine the patient."
      },
      "cervical_lymphadenopathy": {
       "type": "boolean",
       "description": "Principal feature: cervical lymphadenopathy (>=1.5 cm diameter), usually unilateral (McCrindle 2017). true or false as assigned by the caller. magent does not examine the patient."
      },
      "bilateral_conjunctival_injection": {
       "type": "boolean",
       "description": "Principal feature: bilateral bulbar conjunctival injection without exudate (McCrindle 2017). true or false as assigned by the caller. magent does
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/kawasaki-disease-classic-complete-criteria-calculator-mccrindle-2017-a34b5aa5/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.magentlab.com](https://www.zero.xyz/host/api.magentlab.com/llms.txt)