Agent Service · x402 · early usage

Yokoe 2018 TG18 (=TG13) acute cholecystitis

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

30d calls6

30d payers3

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

Yokoe 2018 TG18 (=TG13) acute cholecystitis. Definite if local signs (Murphy or RUQ mass/pain/tenderness), systemic signs (fever, elevated CRP or WBC), and imaging; suspected if local and systemic without imaging; else none. Suspected/definite: Grade III if any organ dysfunction, else Grade II if any Grade II flag, else Grade I. Severity none when diagnosis is none. Not cholangitis or Alvarado/RIPASA. magent does not examine, assay, or read imaging. Not a medical device.

Tags: tokyo-cholecystitis · cholecystitis · tg18 · gi · calculator · bazaar

Call contract

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

Input example from Bazaar metadata

{
  "items": [
    {
      "decreased_consciousness": false,
      "duration_gt_72h": false,
      "elevated_crp": false,
      "elevated_wbc": false,
      "fever": false,
      "hypotension_vasopressors": false,
      "imaging_findings": false,
      "marked_local_inflammation": false,
      "murphy": false,
      "oliguria_or_creatinine_gt_2": false,
      "palpable_tender_ruq_mass": false,
      "pfr_lt_300": false,
      "platelets_lt_100k": false,
      "pt_inr_gt_1_5": false,
      "ruq_mass_pain_tenderness": false,
      "wbc_gt_18000": false
    },
    {
      "decreased_consciousness": false,
      "duration_gt_72h": false,
      "elevated_crp": false,
      "elevated_wbc": false,
      "fever": false,
      "hypotension_vasopressors": false,
      "imaging_findings": false,
      "marked_local_inflammation": false,
      "murphy": false,
      "oliguria_or_creatinine_gt_2": false,
      "palpable_tender_ruq_mass": false,
      "pfr_lt_300": false,
      "platelets_lt_100k": false,
      "pt_inr_gt_1_5": false,
      "ruq_mass_pain_tenderness": false,
      "wbc_gt_18000": false
    }
  ]
}

Output example

{
  "count": 2,
  "items": [
    {
      "citation": {
        "authors": "Yokoe M, Hata J, Takada T, et al.",
        "doi": "10.1002/jhbp.515",
        "id": "yokoe-2018",
        "pmid": "29032636",
        "source": "J Hepatobiliary Pancreat Sci. 2018;25(1):41-54",
        "title": "Tokyo Guidelines 2018: diagnostic criteria and severity grading of acute cholecystitis (with videos)."
      },
      "criteria": [
        {
          "factor": "local_signs",
          "met": false
        },
        {
          "factor": "systemic_signs",
          "met": false
        },
        {
          "factor": "imaging_findings",
          "met": false
        },
        {
          "factor": "grade_iii_any",
          "met": false
        },
        {
          "factor": "grade_ii_any",
          "met": false
        },
        {
          "factor": "murphy",
          "met": false
        },
        {
          "factor": "ruq_mass_pain_tenderness",
          "met": false
        },
        {
          "factor": "fever",
          "met": false
        },
        {
          "factor": "elevated_crp",
          "met": false
        },
        {
          "factor": "elevated_wbc",
          "met": false
        },
        {
          "factor": "hypotension_vasopressors",
          "met": false
        },
        {
          "factor": "decreased_consciousness",
          "met": false
        },
        {
          "factor": "pfr_lt_300",
          "met": false
        },
        {
          "factor": "oliguria_or_creatinine_gt_2",
          "met": false
        },
        {
          "factor": "pt_inr_gt_1_5",
          "met": false
        },
        {
          "factor": "platelets_lt_100k",
          "met": false
        },
        {
          "factor": "wbc_gt_18000",
          "met": false
        },
        {
          "factor": "palpable_tender_ruq_mass",
          "met": false
        },
        {
          "factor": "duration_gt_72h",
          "met": false
        },
        {
          "factor": "marked_local_inflammation",
          "met": false
        }
      ],
      "diagnosis": "none",
      "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": "tokyo_cholecystitis",
      "formula_expression": "definite iff local_signs and systemic_signs and imaging_findings; suspected iff local_signs and systemic_signs without imaging_findings; else none. local_signs iff murphy or ruq_mass_pain_tenderness; systemic_signs iff fever or elevated_crp or elevated_wbc. When diagnosis is suspected or definite: grade_iii if any organ-dysfunction flag (hypotension_vasopressors, decreased_consciousness, pfr_lt_300, oliguria_or_creatinine_gt_2, pt_inr_gt_1_5, platelets_lt_100k), else grade_ii if any Grade II flag (wbc_gt_18000, palpable_tender_ruq_mass, duration_gt_72h, marked_local_inflammation), else grade_i. When diagnosis is none, severity is none (Yokoe 2018 TG18 = TG13 unmodified)",
      "severity": "none"
    },
    {
      "citation": {
        "authors": "Yokoe M, Hata J, Takada T, et al.",
        "doi": "10.1002/jhbp.515",
        "id": "yokoe-2018",
        "pmid": "29032636",
        "source": "J Hepatobiliary Pancreat Sci. 2018;25(1):41-54",
        "title": "Tokyo Guidelines 2018: diagnostic criteria and severity grading of acute cholecystitis (with videos)."
      },
      "criteria": [
        {
          "factor": "local_signs",
          "met": false
        },
        {
          "factor": "systemic_signs",
          "met": false
        },
        {
          "factor": "imaging_findings",
          "met": false
        },
        {
          "factor": "grade_iii_any",
          "met": false
        },
        {
          "factor": "grade_ii_any",
          "met": false
        },
        {
          "factor": "murphy",
          "met": false
        },
        {
          "factor": "ruq_mass_pain_tenderness",
          "met": false
        },
        {
          "factor": "fever",
          "met": false
        },
        {
          "factor": "elevated_crp",
          "met": false
        },
        {
          "factor": "elevated_wbc",
          "met": false
        },
        {
          "factor": "hypotension_vasopressors",
          "met": false
        },
        {
          "factor": "decreased_consciousness",
          "met": false
        },
        {
          "factor": "pfr_lt_300",
          "met": false
        },
        {
          "factor": "oliguria_or_creatinine_gt_2",
          "met": false
        },
        {
          "factor": "pt_inr_gt_1_5",
          "met": false
        },
        {
          "factor": "platelets_lt_100k",
          "met": false
        },
        {
          "factor": "wbc_gt_18000",
          "met": false
        },
        {
          "factor": "palpable_tender_ruq_mass",
          "met": false
        },
        {
          "factor": "duration_gt_72h",
          "met": false
        },
        {
          "factor": "marked_local_inflammation",
          "met": false
        }
      ],
      "diagnosis": "none",
      "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": "tokyo_cholecystitis",
      "formula_expression": "definite iff local_signs and systemic_signs and imaging_findings; suspected iff local_signs and systemic_signs without imaging_findings; else none. local_signs iff murphy or ruq_mass_pain_tenderness; systemic_signs iff fever or elevated_crp or elevated_wbc. When diagnosis is suspected or definite: grade_iii if any organ-dysfunction flag (hypotension_vasopressors, decreased_consciousness, pfr_lt_300, oliguria_or_creatinine_gt_2, pt_inr_gt_1_5, platelets_lt_100k), else grade_ii if any Grade II flag (wbc_gt_18000, palpable_tender_ruq_mass, duration_gt_72h, marked_local_inflammation), else grade_i. When diagnosis is none, severity is none (Yokoe 2018 TG18 = TG13 unmodified)",
      "severity": "none"
    }
  ],
  "path": "/api/calc/tokyo_cholecystitis"
}

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/38778.json for the price and payment options.
Pay. Call GET https://api.magentlab.com/api/calc/tokyo_cholecystitis. 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: 6 calls · 3 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/tokyo_cholecystitis"
# -> 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/tokyo_cholecystitis");
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/tokyo_cholecystitis")
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/tokyo_cholecystitis
Machine-readable: /resources/38778.json