# GMAWS (McPherson)

GMAWS

Status: LIVE
Price: $0.005 USDC
`GET /api/calc/gmaws`
HTML: https://magentlab.com/docs/gmaws
Markdown: https://magentlab.com/docs/gmaws.md

Not a medical device. Not a diagnosis, dose, or listing recommendation.

## What it computes

Sum five caller-assigned McPherson 2012 GMAWS integers (0-2) and return the published total (max 10) and Figure 1 score-group band.

## When to use

When an agent has already assigned McPherson 2012 Figure 1 item integers (tremor, sweating, hallucination, orientation, agitation) and needs the published GMAWS total and score-group band, not a benzodiazepine or treatment order.

## When not to use

- Not a medical device and not a benzodiazepine, symptom-triggered, or treatment order.
- Each of the five items is a caller-assigned integer 0, 1, or 2 from McPherson 2012 Figure 1. magent does not observe the patient.
- Temperature is not an item. McPherson 2012 studied temperature then removed it from the post-temperature GMAWS used here.
- Returned bands are McPherson 2012 Figure 1 score groups (zero, 1_to_3, 4_to_8, 9_to_10), not diazepam or chlordiazepoxide treatment orders.

## Formula

```
GMAWS = tremor + sweating + hallucination + orientation + agitation; each caller-assigned 0-2; max 10
```

## Citation

[Appraisal of the Glasgow assessment and management of alcohol guideline: a comprehensive alcohol management protocol for use in general hospitals](https://doi.org/10.1093/qjmed/hcs020)
McPherson A, Benson G, Forrest EH
QJM. 2012;105(7):649-656
DOI: [10.1093/qjmed/hcs020](https://doi.org/10.1093/qjmed/hcs020)

## Worked example

### All items 0

Given: `agitation=0, hallucination=0, orientation=0, sweating=0, tremor=0`

1. tremor 0 + sweating 0 + hallucination 0 + orientation 0 + agitation 0
2. Score = 0 (max 10); gmaws_band zero


### All items 2

Given: `agitation=2, hallucination=2, orientation=2, sweating=2, tremor=2`

1. tremor 2 + sweating 2 + hallucination 2 + orientation 2 + agitation 2
2. Score = 10 (max 10); gmaws_band 9_to_10


## Also searched as

- GMAWS
- Glasgow Modified Alcohol Withdrawal Scale
- McPherson GMAWS
- GMAWS score
- Glasgow alcohol withdrawal
- McPherson 2012 GMAWS
- alcohol withdrawal scale

## Parameters

- `tremor` (integer, required): Caller-assigned McPherson 2012 Figure 1 tremor (integer 0-2): 0 no tremor; 1 on movement; 2 at rest. magent does not observe the patient.
- `sweating` (integer, required): Caller-assigned McPherson 2012 Figure 1 sweating (integer 0-2): 0 no sweat visible; 1 moist; 2 drenching sweats. magent does not observe the patient.
- `hallucination` (integer, required): Caller-assigned McPherson 2012 Figure 1 hallucination (integer 0-2): 0 not present; 1 dissuadable; 2 not dissuadable. magent does not observe the patient.
- `orientation` (integer, required): Caller-assigned McPherson 2012 Figure 1 orientation (integer 0-2): 0 orientated; 1 vague/detached; 2 disorientated, no contact. magent does not observe the patient.
- `agitation` (integer, required): Caller-assigned McPherson 2012 Figure 1 agitation (integer 0-2): 0 calm; 1 anxious; 2 panicky. magent does not observe the patient.

## Bulk (POST)

POST the same path with a JSON items array. The first item is the GET unit; each additional item is $0.002. Invalid items return HTTP 400 before settlement.

Method: `POST /api/calc/gmaws`
Max items: 25
Price: unit_amount + extra_item_amount * (n - 1) (unit 5000 atomic, extra 2000 atomic)
Status: PREVIEW

- 1 to 25 items. Each item uses the same keys as the GET query parameters.
- POST of 1 item costs the same as GET. Lists longer than 25: chunk into multiple POSTs. Extra items still execute; do not pad dummy rows.
- The first invalid item fails the whole request (index in the 400 JSON). You are not charged.
- HTTP 200 is {count, path, items}. Each items[i] is the GET 200 body for that row.
- Catalog misses (empty matches, found=false) stay paid 200s inside that slot.
- x402 resource URL is this path plus n and body_sha256. Browsers that prefer text/html get the same paywall as GET; Pay retries POST with the same items.

Example request:

```json
{
  "items": [
    {
      "agitation": "0",
      "hallucination": "0",
      "orientation": "0",
      "sweating": "0",
      "tremor": "0"
    },
    {
      "agitation": "0",
      "hallucination": "0",
      "orientation": "0",
      "sweating": "0",
      "tremor": "0"
    }
  ]
}
```

Human paywall (two-item fixture): https://api.magentlab.com/paywall/bulk/gmaws

Example 200:

```json
{
  "count": 2,
  "path": "/api/calc/gmaws",
  "items": [
    {
      "components": [
        {
          "value": 0,
          "factor": "tremor",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "sweating",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "hallucination",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "orientation",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "agitation",
          "points": 0,
          "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.",
      "citation": {
        "authors": "McPherson A, Benson G, Forrest EH",
        "doi": "10.1093/qjmed/hcs020",
        "id": "mcpherson-2012",
        "pmid": "22328545",
        "source": "QJM. 2012;105(7):649-656",
        "title": "Appraisal of the Glasgow assessment and management of alcohol guideline: a comprehensive alcohol management protocol for use in general hospitals"
      },
      "formula": "gmaws",
      "formula_expression": "GMAWS = tremor + sweating + hallucination + orientation + agitation; each caller-assigned 0-2; max 10",
      "max_score": 10,
      "score": 0,
      "gmaws_band": "zero"
    },
    {
      "components": [
        {
          "value": 0,
          "factor": "tremor",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "sweating",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "hallucination",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "orientation",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "agitation",
          "points": 0,
          "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.",
      "citation": {
        "authors": "McPherson A, Benson G, Forrest EH",
        "doi": "10.1093/qjmed/hcs020",
        "id": "mcpherson-2012",
        "pmid": "22328545",
        "source": "QJM. 2012;105(7):649-656",
        "title": "Appraisal of the Glasgow assessment and management of alcohol guideline: a comprehensive alcohol management protocol for use in general hospitals"
      },
      "formula": "gmaws",
      "formula_expression": "GMAWS = tremor + sweating + hallucination + orientation + agitation; each caller-assigned 0-2; max 10",
      "max_score": 10,
      "score": 0,
      "gmaws_band": "zero"
    }
  ]
}
```

## Response fields

- `formula` (string): gmaws
- `formula_expression` (string): Exact expression used
- `score` (integer): GMAWS points 0-10
- `max_score` (integer): Always 10
- `gmaws_band` (string): McPherson 2012 Figure 1 score group: zero (0), 1_to_3 (1-3), 4_to_8 (4-8), or 9_to_10 (9-10). A score-group band, not a benzodiazepine or treatment order.
- `components` (array): Per-item caller-assigned points
- `citation` (object): McPherson et al. QJM 2012 citation
- `disclaimer` (string): Not-a-device notice

## Example JSON

Frozen fixture. Not a live lookup.

```json
{
  "components": [
    {
      "value": 0,
      "factor": "tremor",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "sweating",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "hallucination",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "orientation",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "agitation",
      "points": 0,
      "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.",
  "citation": {
    "authors": "McPherson A, Benson G, Forrest EH",
    "doi": "10.1093/qjmed/hcs020",
    "id": "mcpherson-2012",
    "pmid": "22328545",
    "source": "QJM. 2012;105(7):649-656",
    "title": "Appraisal of the Glasgow assessment and management of alcohol guideline: a comprehensive alcohol management protocol for use in general hospitals"
  },
  "formula": "gmaws",
  "formula_expression": "GMAWS = tremor + sweating + hallucination + orientation + agitation; each caller-assigned 0-2; max 10",
  "max_score": 10,
  "score": 0,
  "gmaws_band": "zero"
}
```

## Errors

- HTTP 400 `invalid_gmaws`: tremor, sweating, hallucination, orientation, and agitation must each be an integer 0, 1, or 2 (McPherson 2012 GMAWS Figure 1). Returned before settlement; you are not charged.
- HTTP 400 `invalid_items`: POST body must be a JSON object with only an items array Returned before settlement; you are not charged.
- HTTP 400 `invalid_item_count`: items must be an array of 1 to 25 objects Returned before settlement; you are not charged.
- HTTP 400 `invalid_item`: each items entry must be a JSON object Returned before settlement; you are not charged.

Shared HTTP 402 and 503: https://magentlab.com/docs/payments

## Related tools

- [CIWA-Ar](https://magentlab.com/docs/ciwa-ar) — Sum the ten Sullivan 1989 CIWA-Ar items (nine caller-assigned 0-7 plus orientation 0-4) and return the published total (max 67).

## Payment

Unpaid requests return HTTP 402 even if query parameters or POST items are missing or invalid, so CDP and agents can index the path. After a PAYMENT-SIGNATURE, invalid params return HTTP 400 JSON before settlement. magent does not charge. Fix the params, then request a new 402 quote for that complete URL. Catalog misses (empty matches, found=false) are valid paid 200s.

- GET the tool with Accept: application/json (do not send Accept: text/html unless you want the human paywall).
- HTTP 402 means you have not paid. Decode the base64 PAYMENT-REQUIRED header. HTTP 503 is not a new quote.
- Sign accepts[0] (exact, EIP-3009) with validBefore = now + maxTimeoutSeconds (600 seconds), or accepts[1] (batch-settlement deposit/voucher) on product GET. Ping and POST {items} stay exact. Magent retries transient facilitator 429/5xx before answering.
- Retry the same URL with PAYMENT-SIGNATURE (base64 JSON of accepted and payload). Magent attaches canonical extensions.bazaar on CDP verify/settle; echoing 402 bazaar is optional.
- Success is HTTP 200 JSON plus PAYMENT-RESPONSE. exact settles before the tool. batch-settlement verifies (and deposit-settles) before the tool and commits the charge after HTTP 2xx. HTTP 503: retry the same PAYMENT-SIGNATURE. Mint a new exact nonce only after a new HTTP 402.

- offered `exact` on eip155:8453: Fixed-price USDC on Base. The buyer authorizes the advertised amount (EIP-3009). magent settles before the tool runs (paymentFlow upfront). extra.assetTransferMethod=eip3009 extra.paymentFlow=upfront.
- offered `batch-settlement` on eip155:8453: Payment-channel vouchers claimed later in batches. Exact stays accepts[0]. Same-path POST {items} is still exact. extra.assetTransferMethod=eip3009 extra.paymentFlow=authorization.

- not offered `upto`: Not offered. Usage-based: buyer authorizes a ceiling, seller settles the actual amount after work. Reserved for a future metered tool. Not for current calculators or code search.

Same-path POST {items} is still scheme exact: one EIP-3009 authorization for GET unit plus $0.002 per extra item. That is not x402 batch-settlement (payment channels / vouchers).

Shared HTTP 402 and 503 table: https://magentlab.com/docs/payments

Stdio MCP (one process per host): https://magentlab.com/docs/mcp

## Guarantees

- HTTP 402 is unpaid, including a missing query. After PAYMENT-SIGNATURE, invalid parameters return HTTP 400 before settlement. You are not charged. HTTP 402 never includes the tool JSON.
- exact: settlement finishes before the tool (paymentFlow upfront). batch-settlement: verify/deposit before the tool; chargedCumulativeAmount commits after HTTP 2xx. Uncertain or failed settlement fails closed (HTTP 503). Retry the same PAYMENT-SIGNATURE.
- HTTP 402 is unpaid only. Do not sign a second authorization because of a 503.
- Execution is timeout-bounded and concurrency-capped.
- Calculator inputs are stored encrypted for allowlisted operators (Magent Console). They are not in public logs, SSH lookups, catalog, or rollups. Request logs store path without query.
