Agent Service · x402 · early usage

Gewitz 2015 AHA Jones criteria (Table 7)

by api.magentlab.com · discovered, not yet claimed by its owner · updated 2026-10-13

30d calls5

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

Gewitz 2015 AHA Jones criteria (Table 7). jones_arf iff evidence_of_preceding_gas and the episode rule: initial 2 major or 1 major plus 2 minor; recurrent also allows 3 minor. Majors/minors follow population_risk for arthritis vs arthralgia, fever, and ESR/CRP. Prolonged PR does not count with carditis. Joints count in major or minor, not both. magent does not examine the patient or read an echocardiogram. Not Jones 1944. Not a diagnosis. Not a medical device.

Tags: jones · rheumatic-fever · arf · infection · calculator · bazaar

Call contract

Method: POST
Input: HTTP request
Output: json
Last paid call: 2026-10-13

Input example from Bazaar metadata

{
  "items": [
    {
      "carditis": true,
      "chorea": false,
      "episode": "initial",
      "erythema_marginatum": false,
      "esr_ge_30_or_crp_ge_3": false,
      "esr_ge_60_or_crp_ge_3": false,
      "evidence_of_preceding_gas": true,
      "fever_ge_38": false,
      "fever_ge_38_5": false,
      "monoarthralgia": false,
      "monoarthritis": false,
      "polyarthralgia": false,
      "polyarthritis": true,
      "population_risk": "low",
      "prolonged_pr": false,
      "subcutaneous_nodules": false
    },
    {
      "carditis": true,
      "chorea": false,
      "episode": "initial",
      "erythema_marginatum": false,
      "esr_ge_30_or_crp_ge_3": false,
      "esr_ge_60_or_crp_ge_3": false,
      "evidence_of_preceding_gas": true,
      "fever_ge_38": false,
      "fever_ge_38_5": false,
      "monoarthralgia": false,
      "monoarthritis": false,
      "polyarthralgia": false,
      "polyarthritis": true,
      "population_risk": "low",
      "prolonged_pr": false,
      "subcutaneous_nodules": false
    }
  ]
}

Output example

{
  "count": 2,
  "items": [
    {
      "citation": {
        "authors": "Gewitz MH, Baltimore RS, Tani LY, Sable CA, Shulman ST, Carapetis J, Remenyi B, Taubert KA, Bolger AF, Beerman L, Mayosi BM, Beaton A, Pandian NG, Kaplan EL",
        "doi": "10.1161/CIR.0000000000000205",
        "id": "gewitz-2015",
        "pmid": "25908771",
        "source": "Circulation. 2015;131(20):1806-1818",
        "title": "Revision of the Jones Criteria for the Diagnosis of Acute Rheumatic Fever in the Era of Doppler Echocardiography: A Scientific Statement From the American Heart Association"
      },
      "criteria": [
        {
          "factor": "evidence_of_preceding_gas",
          "met": true
        },
        {
          "factor": "carditis",
          "met": true
        },
        {
          "factor": "polyarthritis",
          "met": true
        },
        {
          "factor": "monoarthritis",
          "met": false
        },
        {
          "factor": "polyarthralgia",
          "met": false
        },
        {
          "factor": "monoarthralgia",
          "met": false
        },
        {
          "factor": "chorea",
          "met": false
        },
        {
          "factor": "erythema_marginatum",
          "met": false
        },
        {
          "factor": "subcutaneous_nodules",
          "met": false
        },
        {
          "factor": "fever_ge_38_5",
          "met": false
        },
        {
          "factor": "fever_ge_38",
          "met": false
        },
        {
          "factor": "esr_ge_60_or_crp_ge_3",
          "met": false
        },
        {
          "factor": "esr_ge_30_or_crp_ge_3",
          "met": false
        },
        {
          "factor": "prolonged_pr",
          "met": false
        },
        {
          "factor": "episode_rule",
          "met": true
        },
        {
          "factor": "jones_arf",
          "met": 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.",
      "episode": "initial",
      "formula": "jones",
      "formula_expression": "jones_arf iff evidence_of_preceding_gas and episode rule (Gewitz 2015 Table 7). initial: 2 major or (1 major and 2 minor). recurrent: 2 major or (1 major and 2 minor) or 3 minor. Majors: carditis (clinical and/or subclinical); arthritis (low: polyarthritis; moderate_high: polyarthritis or monoarthritis, else polyarthralgia); chorea; erythema_marginatum; subcutaneous_nodules. Minors: polyarthralgia (low, if no arthritis major); monoarthralgia (moderate_high, if no arthritis or polyarthralgia major); fever (low: fever_ge_38_5; moderate_high: fever_ge_38); ESR/CRP (low: esr_ge_60_or_crp_ge_3; moderate_high: esr_ge_30_or_crp_ge_3); prolonged_pr only when carditis is false. Joints count in major or minor, not both, at most one joint major. Not Jones 1944. Not a diagnosis",
      "jones_arf": true,
      "major_count": 2,
      "minor_count": 0,
      "population_risk": "low"
    },
    {
      "citation": {
        "authors": "Gewitz MH, Baltimore RS, Tani LY, Sable CA, Shulman ST, Carapetis J, Remenyi B, Taubert KA, Bolger AF, Beerman L, Mayosi BM, Beaton A, Pandian NG, Kaplan EL",
        "doi": "10.1161/CIR.0000000000000205",
        "id": "gewitz-2015",
        "pmid": "25908771",
        "source": "Circulation. 2015;131(20):1806-1818",
        "title": "Revision of the Jones Criteria for the Diagnosis of Acute Rheumatic Fever in the Era of Doppler Echocardiography: A Scientific Statement From the American Heart Association"
      },
      "criteria": [
        {
          "factor": "evidence_of_preceding_gas",
          "met": true
        },
        {
          "factor": "carditis",
          "met": true
        },
        {
          "factor": "polyarthritis",
          "met": true
        },
        {
          "factor": "monoarthritis",
          "met": false
        },
        {
          "factor": "polyarthralgia",
          "met": false
        },
        {
          "factor": "monoarthralgia",
          "met": false
        },
        {
          "factor": "chorea",
          "met": false
        },
        {
          "factor": "erythema_marginatum",
          "met": false
        },
        {
          "factor": "subcutaneous_nodules",
          "met": false
        },
        {
          "factor": "fever_ge_38_5",
          "met": false
        },
        {
          "factor": "fever_ge_38",
          "met": false
        },
        {
          "factor": "esr_ge_60_or_crp_ge_3",
          "met": false
        },
        {
          "factor": "esr_ge_30_or_crp_ge_3",
          "met": false
        },
        {
          "factor": "prolonged_pr",
          "met": false
        },
        {
          "factor": "episode_rule",
          "met": true
        },
        {
          "factor": "jones_arf",
          "met": 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.",
      "episode": "initial",
      "formula": "jones",
      "formula_expression": "jones_arf iff evidence_of_preceding_gas and episode rule (Gewitz 2015 Table 7). initial: 2 major or (1 major and 2 minor). recurrent: 2 major or (1 major and 2 minor) or 3 minor. Majors: carditis (clinical and/or subclinical); arthritis (low: polyarthritis; moderate_high: polyarthritis or monoarthritis, else polyarthralgia); chorea; erythema_marginatum; subcutaneous_nodules. Minors: polyarthralgia (low, if no arthritis major); monoarthralgia (moderate_high, if no arthritis or polyarthralgia major); fever (low: fever_ge_38_5; moderate_high: fever_ge_38); ESR/CRP (low: esr_ge_60_or_crp_ge_3; moderate_high: esr_ge_30_or_crp_ge_3); prolonged_pr only when carditis is false. Joints count in major or minor, not both, at most one joint major. Not Jones 1944. Not a diagnosis",
      "jones_arf": true,
      "major_count": 2,
      "minor_count": 0,
      "population_risk": "low"
    }
  ],
  "path": "/api/calc/jones"
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/39070.json for the price and payment options.
Pay. Call GET https://api.magentlab.com/api/calc/jones. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
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: 5 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.005	0x836Be278f1739fB4308091cD1852F7971Bc19Ee2	600s

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/jones"
# -> 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/jones");
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/jones")
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/jones
Machine-readable: /resources/39070.json