Agent Service · x402 · early usage

Thompson 1999 Rome II IBS

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

Thompson 1999 Rome II IBS. rome_ii_ibs is true iff at least 12 weeks (need not be consecutive) in the preceding 12 months of abdominal discomfort or pain and at least two of: relieved with defecation, onset associated with a change in stool frequency, and onset associated with a change in stool form. supporting_features_met is 0-3. Caller assigns four flags. magent does not examine the patient. Not a diagnosis, not Rome III, not Rome IV, not Manning, not IBS subtype.

Tags: rome-ii-ibs · ibs · gi · functional-bowel · calculator · bazaar

Call contract

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

Input example from Bazaar metadata

{
  "items": [
    {
      "onset_change_stool_form": false,
      "onset_change_stool_frequency": true,
      "pain_or_discomfort_12_weeks_of_12_months": true,
      "relieved_with_defecation": true
    },
    {
      "onset_change_stool_form": false,
      "onset_change_stool_frequency": true,
      "pain_or_discomfort_12_weeks_of_12_months": true,
      "relieved_with_defecation": true
    }
  ]
}

Output example

{
  "count": 2,
  "items": [
    {
      "citation": {
        "authors": "Thompson WG, Longstreth GF, Drossman DA, Heaton KW, Irvine EJ, Müller-Lissner SA",
        "doi": "10.1136/gut.45.2008.ii43",
        "id": "thompson-1999",
        "pmid": "10457044",
        "source": "Gut. 1999;45 Suppl 2:II43-II47",
        "title": "Functional bowel disorders and functional abdominal pain"
      },
      "criteria": [
        {
          "factor": "pain_or_discomfort_12_weeks_of_12_months",
          "met": true
        },
        {
          "factor": "relieved_with_defecation",
          "met": true
        },
        {
          "factor": "onset_change_stool_frequency",
          "met": true
        },
        {
          "factor": "onset_change_stool_form",
          "met": false
        },
        {
          "factor": "supporting_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_ii_ibs",
      "formula_expression": "rome_ii_ibs iff pain_or_discomfort_12_weeks_of_12_months and supporting_features_met >= 2; supporting_features_met counts relieved_with_defecation, onset_change_stool_frequency, and onset_change_stool_form (Thompson 1999 Rome II IBS diagnostic criteria)",
      "rome_ii_ibs": true,
      "supporting_features_met": 2
    },
    {
      "citation": {
        "authors": "Thompson WG, Longstreth GF, Drossman DA, Heaton KW, Irvine EJ, Müller-Lissner SA",
        "doi": "10.1136/gut.45.2008.ii43",
        "id": "thompson-1999",
        "pmid": "10457044",
        "source": "Gut. 1999;45 Suppl 2:II43-II47",
        "title": "Functional bowel disorders and functional abdominal pain"
      },
      "criteria": [
        {
          "factor": "pain_or_discomfort_12_weeks_of_12_months",
          "met": true
        },
        {
          "factor": "relieved_with_defecation",
          "met": true
        },
        {
          "factor": "onset_change_stool_frequency",
          "met": true
        },
        {
          "factor": "onset_change_stool_form",
          "met": false
        },
        {
          "factor": "supporting_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_ii_ibs",
      "formula_expression": "rome_ii_ibs iff pain_or_discomfort_12_weeks_of_12_months and supporting_features_met >= 2; supporting_features_met counts relieved_with_defecation, onset_change_stool_frequency, and onset_change_stool_form (Thompson 1999 Rome II IBS diagnostic criteria)",
      "rome_ii_ibs": true,
      "supporting_features_met": 2
    }
  ],
  "path": "/api/calc/rome_ii_ibs"
}

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/38775.json for the price and payment options.
Pay. Call GET https://api.magentlab.com/api/calc/rome_ii_ibs. 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/rome_ii_ibs"
# -> 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_ii_ibs");
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_ii_ibs")
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_ii_ibs
Machine-readable: /resources/38775.json