# Glasgow Coma Scale

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

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

## What it computes

Compute the Glasgow Coma Scale as the sum of caller-assigned eye, verbal, and motor integers. The 1974 or 1976 edition is required.

## When to use

When an agent needs a published Teasdale-Jennett GCS total and must not silently pick the 1974 five-point motor scale or the 1976 six-point motor scale.

## When not to use

- Not a diagnosis and not a trauma triage, intubation, or disposition order.
- Eye, verbal, and motor are caller-supplied integers. magent does not observe the three signs.
- edition is required. magent does not pick 1974 (motor 1-5, max 14) or 1976 (motor 1-6, max 15).

## Formula

```
GCS = eye + verbal + motor; eye 1-4, verbal 1-5, motor 1-6; max 15
```

## Citation

Assessment of coma and impaired consciousness. A practical scale
Teasdale G, Jennett B
Lancet. 1974;2(7872):81-84
DOI: [10.1016/S0140-6736(74)91639-0](https://doi.org/10.1016/S0140-6736(74)91639-0)

## Worked example

### 1976 E4 V5 M6

Given: `edition=1976, eye=4, motor=6, verbal=5`

1. eye 4 + verbal 5 + motor 6
2. Score = 15 (max 15)


### 1974 E4 V5 M5

Given: `edition=1974, eye=4, motor=5, verbal=5`

1. eye 4 + verbal 5 + motor 5
2. Score = 14 (max 14)


### 1976 E1 V1 M1

Given: `edition=1976, eye=1, motor=1, verbal=1`

1. eye 1 + verbal 1 + motor 1
2. Score = 3


## Parameters

- `eye` (integer, required): Eye opening (E). Integer 1-4 as assigned by the caller.
- `verbal` (integer, required): Verbal response (V). Integer 1-5 as assigned by the caller.
- `motor` (integer, required): Motor response (M). Integer 1-5 when edition=1974, or 1-6 when edition=1976, as assigned by the caller.
- `edition` (string, required): Published motor scale. Required; magent does not pick 1974 (motor 1-5) or 1976 (motor 1-6).

## Bulk (POST)

POST the same path with a JSON items array. Price is n times the GET unit. Invalid items return HTTP 400 before settlement.

Method: `POST /api/calc/gcs`
Max items: 25
Price: unit_amount * n (unit 5000 atomic)
Status: PREVIEW

- 1 to 25 items. Each item uses the same keys as the GET query parameters.
- 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": [
    {
      "edition": "1976",
      "eye": "4",
      "motor": "6",
      "verbal": "5"
    },
    {
      "edition": "1976",
      "eye": "4",
      "motor": "6",
      "verbal": "5"
    }
  ]
}
```

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

Example 200:

```json
{
  "count": 2,
  "path": "/api/calc/gcs",
  "items": [
    {
      "components": [
        {
          "value": 4,
          "factor": "eye",
          "points": 4,
          "present": true
        },
        {
          "value": 5,
          "factor": "verbal",
          "points": 5,
          "present": true
        },
        {
          "value": 6,
          "factor": "motor",
          "points": 6,
          "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": "Teasdale G, Jennett B",
        "doi": "10.1007/BF01405862",
        "id": "teasdale-jennett-1976",
        "source": "Acta Neurochir (Wien). 1976;34:45-55",
        "title": "Assessment and prognosis of coma after head injury"
      },
      "formula": "gcs",
      "formula_expression": "GCS = eye + verbal + motor; eye 1-4, verbal 1-5, motor 1-6; max 15",
      "max_score": 15,
      "score": 15,
      "edition": "1976"
    },
    {
      "components": [
        {
          "value": 4,
          "factor": "eye",
          "points": 4,
          "present": true
        },
        {
          "value": 5,
          "factor": "verbal",
          "points": 5,
          "present": true
        },
        {
          "value": 6,
          "factor": "motor",
          "points": 6,
          "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": "Teasdale G, Jennett B",
        "doi": "10.1007/BF01405862",
        "id": "teasdale-jennett-1976",
        "source": "Acta Neurochir (Wien). 1976;34:45-55",
        "title": "Assessment and prognosis of coma after head injury"
      },
      "formula": "gcs",
      "formula_expression": "GCS = eye + verbal + motor; eye 1-4, verbal 1-5, motor 1-6; max 15",
      "max_score": 15,
      "score": 15,
      "edition": "1976"
    }
  ]
}
```

## Response fields

- `formula` (string): gcs
- `formula_expression` (string): Exact expression used
- `edition` (string): 1974 or 1976
- `score` (integer): Total points (3-14 or 3-15)
- `max_score` (integer): 14 (1974) or 15 (1976)
- `components` (array): Per-sign points
- `citation` (object): Teasdale and Jennett 1974 or 1976
- `disclaimer` (string): Not-a-device notice

## Example JSON

Frozen fixture. Not a live lookup.

```json
{
  "components": [
    {
      "value": 4,
      "factor": "eye",
      "points": 4,
      "present": true
    },
    {
      "value": 5,
      "factor": "verbal",
      "points": 5,
      "present": true
    },
    {
      "value": 6,
      "factor": "motor",
      "points": 6,
      "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": "Teasdale G, Jennett B",
    "doi": "10.1007/BF01405862",
    "id": "teasdale-jennett-1976",
    "source": "Acta Neurochir (Wien). 1976;34:45-55",
    "title": "Assessment and prognosis of coma after head injury"
  },
  "formula": "gcs",
  "formula_expression": "GCS = eye + verbal + motor; eye 1-4, verbal 1-5, motor 1-6; max 15",
  "max_score": 15,
  "score": 15,
  "edition": "1976"
}
```

## Errors

- HTTP 400 `invalid_gcs_component`: eye (1-4), verbal (1-5), and motor (1-5 for edition=1974, 1-6 for edition=1976) must each be integers in range. Returned before settlement; you are not charged.
- HTTP 400 `invalid_gcs_edition`: edition must be 1974 or 1976. 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.
- HTTP 402 `payment_required`: Missing or invalid PAYMENT-SIGNATURE; decode the PAYMENT-REQUIRED header
- HTTP 409 `payment_in_progress`: The same authorization nonce is already being settled; retry shortly
- HTTP 429 `rate_limited`: Too many requests from this client
- HTTP 503 `settlement_uncertain`: Settlement is unconfirmed; retry with the same PAYMENT-SIGNATURE
- HTTP 503 `settle_failed`: Settlement failed; retry with the same PAYMENT-SIGNATURE shortly
- HTTP 503 `facilitator_unavailable`: Payment facilitator unavailable
- HTTP 503 `facilitator_misconfigured`: Payment facilitator is not configured
- HTTP 503 `facilitator_unauthorized`: Payment facilitator rejected credentials
- HTTP 503 `ledger_unavailable`: Payment ledger unavailable
- HTTP 503 `payment_unavailable`: Payment processing unavailable

## Related tools

- None

## Also searched as

- Glasgow Coma Scale
- GCS score
- Teasdale Jennett scale
- Glasgow coma score
- eye verbal motor
- GCS 1974
- GCS 1976

## Payment

Required query parameters must be present and valid. 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 EIP-3009 with validBefore = now + accepts[0].maxTimeoutSeconds (600 seconds). That window starts when you sign and must cover wallet confirmation plus CDP verify and settle. Magent retries transient facilitator 429/5xx before answering.
- Retry the same URL with PAYMENT-SIGNATURE (base64 JSON echoing accepted, payload, and extensions when present).
- Success is HTTP 200 JSON plus PAYMENT-RESPONSE. Settlement happens before the tool runs. HTTP 503 settlement_uncertain or settle_failed: retry the same PAYMENT-SIGNATURE. Mint a new nonce only after a new HTTP 402.

## Guarantees

- Invalid query parameters return HTTP 400 before settlement. You are not charged.
- Settlement finishes before the tool executes. 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 not persisted. Request logs store path without query.