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Agent Service · x402 · early usage

AHA 2017 classic/complete Kawasaki disease (McCrindle)

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 impleme…

by api.magentlab.com · discovered, not yet claimed by its owner · updated 2026-10-12

30d calls4
30d payers2
MethodPOST
Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

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.

Tags: kawasaki · kawasaki-disease · infection · fever · calculator · bazaar

Call contract

Method
POST
Input
HTTP request
Output
json
Last paid call
2026-10-12
Input example from Bazaar metadata
{
  "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
    }
  ]
}
Output example
{
  "count": 2,
  "items": [
    {
      "bilateral_conjunctival_injection": true,
      "cervical_lymphadenopathy": true,
      "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"
      },
      "classification": "complete",
      "criteria": [
        {
          "factor": "fever_days_ge_4",
          "met": true,
          "value": 5
        },
        {
          "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
        },
        {
          "factor": "principal_feature_count_ge_4",
          "met": true,
          "value": 5
        }
      ],
      "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.",
      "extremity_changes": true,
      "fever_days": 5,
      "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",
      "oral_mucosal_changes": true,
      "principal_feature_count": 5,
      "rash": true
    },
    {
      "bilateral_conjunctival_injection": true,
      "cervical_lymphadenopathy": true,
      "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"
      },
      "classification": "complete",
      "criteria": [
        {
          "factor": "fever_days_ge_4",
          "met": true,
          "value": 5
        },
        {
          "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
        },
        {
          "factor": "principal_feature_count_ge_4",
          "met": true,
          "value": 5
        }
      ],
      "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.",
      "extremity_changes": true,
      "fever_days": 5,
      "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",
      "oral_mucosal_changes": true,
      "principal_feature_count": 5,
      "rash": true
    }
  ],
  "path": "/api/calc/kawasaki"
}

Use with an agent

  1. Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
  2. Inspect. Fetch /resources/39491.json for the price and payment options.
  3. Pay. Call GET https://api.magentlab.com/api/calc/kawasaki. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
  4. Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price
$0.005 / request
Protocol
x402 v2
Auth
No account or API key. Pay per request.
Networks
Base
Demand
4 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

SchemeNetworkAssetAmountPay toTimeout
exactBase
eip155:8453		USDC$0.0050x836Be278f1739fB4308091cD1852F7971Bc19Ee2600s
accepts[] (raw JSON)
[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x836Be278f1739fB4308091cD1852F7971Bc19Ee2",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 600
  }
]

Schemas

Output schema (JSON Schema)
{
  "properties": {
    "example": {
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}
Example shape — generated from the schema, not a captured live response
{
  "example": {},
  "type": "string"
}

Examples

curl
curl "https://api.magentlab.com/api/calc/kawasaki"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid
JavaScript
const res = await fetch("https://api.magentlab.com/api/calc/kawasaki");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}
Python
import httpx
res = httpx.get("https://api.magentlab.com/api/calc/kawasaki")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider
api.magentlab.com
Endpoint
https://api.magentlab.com/api/calc/kawasaki
Machine-readable
/resources/39491.json