AI Inference · x402 · early usage

Hyams 2016 Rome IV H2c

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

Hyams 2016 Rome IV H2c. rome_iv_child_abdominal_migraine is true iff paroxysmal intense periumbilical, midline, or diffuse pain lasting 1 hour or more, episodes weeks to months apart, incapacitating stereotypical pain, associated_features_met at least 2 (anorexia, nausea, vomiting, headache, photophobia, pallor), not explained by another condition, and 6-month fulfillment. Count 0-6. magent does not examine the child. Not a diagnosis. Not child CVS. Not adult migraine scores.

Tags: rome-iv-child-abd-migraine · abdominal-migraine · gi · rome-iv · h2c · bazaar

Call contract

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

Input example from Bazaar metadata

{
  "items": [
    {
      "anorexia": true,
      "episodes_separated_weeks_to_months": true,
      "fulfilled_at_least_6_months": true,
      "headache": false,
      "nausea": true,
      "not_explained_by_another_condition": true,
      "pain_incapacitating": true,
      "pallor": false,
      "paroxysmal_intense_periumbilical_midline_or_diffuse_pain_lasting_1_hour_or_more": true,
      "photophobia": false,
      "stereotypical_pattern": true,
      "vomiting": false
    },
    {
      "anorexia": true,
      "episodes_separated_weeks_to_months": true,
      "fulfilled_at_least_6_months": true,
      "headache": false,
      "nausea": true,
      "not_explained_by_another_condition": true,
      "pain_incapacitating": true,
      "pallor": false,
      "paroxysmal_intense_periumbilical_midline_or_diffuse_pain_lasting_1_hour_or_more": true,
      "photophobia": false,
      "stereotypical_pattern": true,
      "vomiting": false
    }
  ]
}

Output example

{
  "count": 2,
  "items": [
    {
      "associated_features_met": 2,
      "citation": {
        "authors": "Hyams JS, Di Lorenzo C, Saps M, Shulman RJ, Staiano A, van Tilburg M",
        "doi": "10.1053/j.gastro.2016.02.015",
        "id": "hyams-2016",
        "pmid": "27144632",
        "source": "Gastroenterology. 2016;150(6):1456-1468",
        "title": "Childhood Functional Gastrointestinal Disorders: Child/Adolescent"
      },
      "criteria": [
        {
          "factor": "paroxysmal_intense_periumbilical_midline_or_diffuse_pain_lasting_1_hour_or_more",
          "met": true
        },
        {
          "factor": "episodes_separated_weeks_to_months",
          "met": true
        },
        {
          "factor": "pain_incapacitating",
          "met": true
        },
        {
          "factor": "stereotypical_pattern",
          "met": true
        },
        {
          "factor": "anorexia",
          "met": true
        },
        {
          "factor": "nausea",
          "met": true
        },
        {
          "factor": "vomiting",
          "met": false
        },
        {
          "factor": "headache",
          "met": false
        },
        {
          "factor": "photophobia",
          "met": false
        },
        {
          "factor": "pallor",
          "met": false
        },
        {
          "factor": "not_explained_by_another_condition",
          "met": true
        },
        {
          "factor": "fulfilled_at_least_6_months",
          "met": true
        },
        {
          "factor": "associated_features_ge_2",
          "met": true,
          "value": 2
        }
      ],
      "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": "rome_iv_child_abdominal_migraine",
      "formula_expression": "rome_iv_child_abdominal_migraine iff paroxysmal_intense_periumbilical_midline_or_diffuse_pain_lasting_1_hour_or_more and episodes_separated_weeks_to_months and pain_incapacitating and stereotypical_pattern and associated_features_met >= 2 and not_explained_by_another_condition and fulfilled_at_least_6_months; associated_features_met counts anorexia, nausea, vomiting, headache, photophobia, and pallor (Hyams 2016 Rome IV H2c Abdominal Migraine)",
      "rome_iv_child_abdominal_migraine": true
    },
    {
      "associated_features_met": 2,
      "citation": {
        "authors": "Hyams JS, Di Lorenzo C, Saps M, Shulman RJ, Staiano A, van Tilburg M",
        "doi": "10.1053/j.gastro.2016.02.015",
        "id": "hyams-2016",
        "pmid": "27144632",
        "source": "Gastroenterology. 2016;150(6):1456-1468",
        "title": "Childhood Functional Gastrointestinal Disorders: Child/Adolescent"
      },
      "criteria": [
        {
          "factor": "paroxysmal_intense_periumbilical_midline_or_diffuse_pain_lasting_1_hour_or_more",
          "met": true
        },
        {
          "factor": "episodes_separated_weeks_to_months",
          "met": true
        },
        {
          "factor": "pain_incapacitating",
          "met": true
        },
        {
          "factor": "stereotypical_pattern",
          "met": true
        },
        {
          "factor": "anorexia",
          "met": true
        },
        {
          "factor": "nausea",
          "met": true
        },
        {
          "factor": "vomiting",
          "met": false
        },
        {
          "factor": "headache",
          "met": false
        },
        {
          "factor": "photophobia",
          "met": false
        },
        {
          "factor": "pallor",
          "met": false
        },
        {
          "factor": "not_explained_by_another_condition",
          "met": true
        },
        {
          "factor": "fulfilled_at_least_6_months",
          "met": true
        },
        {
          "factor": "associated_features_ge_2",
          "met": true,
          "value": 2
        }
      ],
      "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": "rome_iv_child_abdominal_migraine",
      "formula_expression": "rome_iv_child_abdominal_migraine iff paroxysmal_intense_periumbilical_midline_or_diffuse_pain_lasting_1_hour_or_more and episodes_separated_weeks_to_months and pain_incapacitating and stereotypical_pattern and associated_features_met >= 2 and not_explained_by_another_condition and fulfilled_at_least_6_months; associated_features_met counts anorexia, nausea, vomiting, headache, photophobia, and pallor (Hyams 2016 Rome IV H2c Abdominal Migraine)",
      "rome_iv_child_abdominal_migraine": true
    }
  ],
  "path": "/api/calc/rome_iv_child_abdominal_migraine"
}

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/39354.json for the price and payment options.
Pay. Call GET https://api.magentlab.com/api/calc/rome_iv_child_abdominal_migraine. 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/rome_iv_child_abdominal_migraine"
# -> 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/rome_iv_child_abdominal_migraine");
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/rome_iv_child_abdominal_migraine")
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/rome_iv_child_abdominal_migraine
Machine-readable: /resources/39354.json