MCP Tool · x402 · early usage

ACR/EULAR 2010 RA classification (Aletaha Table 3)

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

ACR/EULAR 2010 RA classification (Aletaha Table 3). Required: clinical_synovitis true. Score: joint involvement 0/1/2/3/5 + serology 0/2/3 + abnormal CRP or ESR 1 + duration ≥6 weeks 1; max 10. classified false if another disease better explains synovitis; else true if typical RA erosions or score ≥6. Not a diagnosis. Not 1987 ACR RA. Not SDAI. magent does not examine joints or titer RF/ACPA.

Tags: ra · acr-eular · classification · emergency · calculator · bazaar

Call contract

Method: POST
Input: HTTP request
Output: json
Last paid call: 2026-10-12

Input example from Bazaar metadata

{
  "items": [
    {
      "abnormal_apr": true,
      "alternative_diagnosis_better": false,
      "clinical_synovitis": true,
      "duration_ge_6_weeks": true,
      "erosive_disease_typical_of_ra": false,
      "joint_involvement": "four_to_ten_small",
      "serology": "high_positive"
    },
    {
      "abnormal_apr": true,
      "alternative_diagnosis_better": false,
      "clinical_synovitis": true,
      "duration_ge_6_weeks": true,
      "erosive_disease_typical_of_ra": false,
      "joint_involvement": "four_to_ten_small",
      "serology": "high_positive"
    }
  ]
}

Output example

{
  "count": 2,
  "items": [
    {
      "band": "classified",
      "citation": {
        "authors": "Aletaha D, Neogi T, Silman AJ, Funovits J, Felson DT, Bingham CO 3rd, Birnbaum NS, Burmester GR, Bykerk VP, Cohen MD, Combe B, Costenbader KH, Dougados M, Emery P, Ferraccioli G, Hazes JMW, Hobbs K, Huizinga TWJ, Kavanaugh A, Kay J, Kvien TK, Laing T, Mease P, Ménard HA, Moreland LW, Naden RP, Pincus T, Smolen JS, Stanislawska-Biernat E, Symmons D, Tak PP, Upchurch KS, Vencovský J, Wolfe F, Hawker G",
        "doi": "10.1136/ard.2010.138461",
        "id": "aletaha-2010",
        "pmid": "20699241",
        "source": "Ann Rheum Dis. 2010;69(9):1580-1588",
        "title": "2010 Rheumatoid arthritis classification criteria: an American College of Rheumatology/European League Against Rheumatism collaborative initiative"
      },
      "classified": true,
      "components": [
        {
          "factor": "joint_involvement",
          "points": 3,
          "present": true,
          "value": "four_to_ten_small"
        },
        {
          "factor": "serology",
          "points": 3,
          "present": true,
          "value": "high_positive"
        },
        {
          "factor": "abnormal_apr",
          "points": 1,
          "present": true
        },
        {
          "factor": "duration_ge_6_weeks",
          "points": 1,
          "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.",
      "formula": "acr_eular_ra",
      "formula_expression": "ACR/EULAR 2010 RA classification (Aletaha Table 3): required clinical_synovitis true (at least one joint with definite clinical synovitis/swelling; else do not score). Score = joint_involvement (one_large 0, two_to_ten_large 1, one_to_three_small 2, four_to_ten_small 3, gt_ten_with_small 5) + serology (negative 0, low_positive 2, high_positive 3) + abnormal_apr 1 + duration_ge_6_weeks 1; max 10. classified false if alternative_diagnosis_better; else true if erosive_disease_typical_of_ra or score ≥6. Not a diagnosis. Not 1987 ACR RA. Not SDAI",
      "max_score": 10,
      "score": 8
    },
    {
      "band": "classified",
      "citation": {
        "authors": "Aletaha D, Neogi T, Silman AJ, Funovits J, Felson DT, Bingham CO 3rd, Birnbaum NS, Burmester GR, Bykerk VP, Cohen MD, Combe B, Costenbader KH, Dougados M, Emery P, Ferraccioli G, Hazes JMW, Hobbs K, Huizinga TWJ, Kavanaugh A, Kay J, Kvien TK, Laing T, Mease P, Ménard HA, Moreland LW, Naden RP, Pincus T, Smolen JS, Stanislawska-Biernat E, Symmons D, Tak PP, Upchurch KS, Vencovský J, Wolfe F, Hawker G",
        "doi": "10.1136/ard.2010.138461",
        "id": "aletaha-2010",
        "pmid": "20699241",
        "source": "Ann Rheum Dis. 2010;69(9):1580-1588",
        "title": "2010 Rheumatoid arthritis classification criteria: an American College of Rheumatology/European League Against Rheumatism collaborative initiative"
      },
      "classified": true,
      "components": [
        {
          "factor": "joint_involvement",
          "points": 3,
          "present": true,
          "value": "four_to_ten_small"
        },
        {
          "factor": "serology",
          "points": 3,
          "present": true,
          "value": "high_positive"
        },
        {
          "factor": "abnormal_apr",
          "points": 1,
          "present": true
        },
        {
          "factor": "duration_ge_6_weeks",
          "points": 1,
          "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.",
      "formula": "acr_eular_ra",
      "formula_expression": "ACR/EULAR 2010 RA classification (Aletaha Table 3): required clinical_synovitis true (at least one joint with definite clinical synovitis/swelling; else do not score). Score = joint_involvement (one_large 0, two_to_ten_large 1, one_to_three_small 2, four_to_ten_small 3, gt_ten_with_small 5) + serology (negative 0, low_positive 2, high_positive 3) + abnormal_apr 1 + duration_ge_6_weeks 1; max 10. classified false if alternative_diagnosis_better; else true if erosive_disease_typical_of_ra or score ≥6. Not a diagnosis. Not 1987 ACR RA. Not SDAI",
      "max_score": 10,
      "score": 8
    }
  ],
  "path": "/api/calc/acr_eular_ra"
}

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/39479.json for the price and payment options.
Pay. Call GET https://api.magentlab.com/api/calc/acr_eular_ra. 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: 4 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/acr_eular_ra"
# -> 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/acr_eular_ra");
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/acr_eular_ra")
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/acr_eular_ra
Machine-readable: /resources/39479.json