# Manning 1978 IBS Criteria Score Calculator

> Manning 1978 IBS Criteria Score Calculator is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Computes the Manning 1978 IBS symptom score (0–6) by counting how many of six classic symptom flags are present, aiding in assessment of irritable bowel syndrome likelihood.

## Facts

- Endpoint: GET https://api.magentlab.com/api/calc/manning
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/manning-1978-ibs-criteria-score-calculator-69868574
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dJ_T9neZ0h0n0OtokRsAl

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability manning-1978-ibs-criteria-score-calculator-69868574
```

Example prompt: Calculate the Manning IBS score for a patient who has pain relief with bowel movement, more frequent stools at pain onset, and looser stools at pain onset, but no visible abdominal distension, no rectal mucus, and no incomplete evacuation.

## When to prefer this

Use this endpoint when you need a quick, structured Manning 1978 IBS symptom count for clinical documentation, decision support, or research pipelines. Prefer it over Rome III/IV-based tools when the specific Manning 1978 six-symptom framework is required, such as for legacy research comparisons or when a simple additive score (not a diagnostic algorithm) is needed.

## Known failure modes

- Missing any of the six required boolean query parameters returns a validation error
- Non-boolean values for any flag cause a schema validation failure
- Payment not included or insufficient balance results in a 402 Payment Required response

## How this service works

Manning 1978 IBS symptoms. Six caller-assigned flags, 1 each, max 6: visible abdominal distension, pain relief with bowel movement, more frequent stools at pain onset, looser stools at pain onset, rectal mucus, incomplete evacuation. Score is the count of true flags (0-6). More symptoms made IBS more likely; no published cutoff. Count only. Not a diagnosis, not Rome III/IV. magent does not examine the patient.

## Output

Returns a Manning IBS score as an integer from 0 to 6, representing the count of symptom flags that were marked true. Higher scores indicate more symptoms associated with IBS per the Manning 1978 criteria. No diagnosis is made and no cutoff is applied.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "headers": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    },
    "queryParams": {
     "type": "object",
     "required": [
      "visible_abdominal_distension",
      "pain_relief_with_bowel_movement",
      "more_frequent_stools_with_pain_onset",
      "looser_stools_with_pain_onset",
      "rectal_mucus",
      "incomplete_evacuation"
     ],
     "properties": {
      "rectal_mucus": {
       "type": "boolean",
       "description": "Passage of mucus per rectum (Manning 1978; more common in IBS, not statistically significant in that table). true or false as assigned by the caller."
      },
      "incomplete_evacuation": {
       "type": "boolean",
       "description": "Feeling of incomplete evacuation (Manning 1978; more common in IBS, not statistically significant in that table). true or false as assigned by the caller."
      },
      "visible_abdominal_distension": {
       "type": "boolean",
       "description": "Visible abdominal distension (Manning 1978; one of four symptoms significantly more common in IBS). true or false as assigned by the caller. magent does not examine the patient."
      },
      "looser_stools_with_pain_onset": {
       "type": "boolean",
       "description": "Looser stools at onset of pain (Manning 1978; one of four symptoms significantly more common in IBS). true or false as assigned by the caller."
      },
      "pain_relief_with_bowel_movement": {
       "type": "boolean",
       "description": "Pain eased after bowel action (Manning 1978; one of four symptoms significantly more common in IBS). true or false as assigned by the caller."
      },
      "more_frequent_stools_with_pain_onset": {
       "type": "boolean",
       "description": "More frequent stools at onset of pain (Manning 1978; one of four symptoms significantly more common in IBS). true or false as assigned by the caller."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"

… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/manning-1978-ibs-criteria-score-calculator-69868574/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.magentlab.com](https://www.zero.xyz/host/api.magentlab.com/llms.txt)