MAGENT

Emergency · LIVE

BARS (Behavioural Activity Rating Scale)

BARS

Return the Swift 2002 Behavioural Activity Rating Scale (BARS) 1-7 from a caller-assigned integer, with a stable label.

LIVE $0.005 USDC GET /api/calc/bars

Markdown: /docs/bars.md · Canonical: https://magentlab.com/docs/bars

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

What it computes

Return the Swift 2002 Behavioural Activity Rating Scale (BARS) 1-7 from a caller-assigned integer, with a stable label.

When to use

When an agent already has a BARS integer 1, 2, 3, 4, 5, 6, or 7 as in Swift 2002 and needs the published score and label. magent does not observe the patient. Not RASS and not a diagnosis.

When not to use

  • Not a medical device. magent does not observe the patient.
  • Not RASS (Sessler 2002). BARS is Swift 2002 integers 1-7 only. Stable bars_label tokens are not a published class.
  • Not a diagnosis. The caller assigns bars 1-7. magent does not examine the patient or apply restraint.

Formula

BARS = caller-assigned integer 1, 2, 3, 4, 5, 6, or 7 (Swift 2002); max 7

Citation

Title
Validation of the Behavioural Activity Rating Scale (BARS): a novel measure of activity in agitated patients
Authors
Swift RH, Harrigan EP, Cappelleri JC, Kramer D, Chandler LP
Source
J Psychiatr Res. 2002;36(2):87-95
DOI
10.1016/s0022-3956(01)00052-8

Worked example

BARS 4 quiet and awake

Given: bars=4

  1. bars 4 → score 4; max 7; bars 4; quiet_and_awake

BARS 1 difficult to rouse

Given: bars=1

  1. bars 1 → score 1; max 7; bars 1; difficult_to_rouse

Also searched as

  • BARS
  • Behavioural Activity Rating Scale
  • Behavioral Activity Rating Scale
  • Swift BARS
  • BARS score
  • activity rating scale
  • agitation rating scale

Try

Opens the live endpoint. Unpaid browser requests show the paywall; agents should send Accept: application/json.

/api/calc/bars?bars=4

Full URL: https://api.magentlab.com/api/calc/bars?bars=4

Call

Expect HTTP 402 until you retry with PAYMENT-SIGNATURE. Incomplete query params return HTTP 400 before any quote or charge. 

curl -i -H "Accept: application/json" "https://api.magentlab.com/api/calc/bars?bars=4"

Parameters

Name Type Required Description
bars integer required Swift 2002 Behavioural Activity Rating Scale integer 1, 2, 3, 4, 5, 6, or 7 as assigned by the caller (1 difficult or unable to rouse; 2 asleep but responds normally to verbal or physical contact; 3 drowsy, appears sedated; 4 quiet and awake, normal level of activity; 5 signs of overt physical or verbal activity, calms with instructions; 6 extremely or continuously active, not requiring restraint; 7 violent, requires restraint). 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.

POST /api/calc/bars Max 25 unit_amount + extra_item_amount * (n - 1) extra $0.002 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 (fixture)

{
  "items": [
    {
      "bars": "4"
    },
    {
      "bars": "4"
    }
  ]
}

Open bulk paywall →

Opens a two-item fixture on the API host. Unpaid browsers get the same MetaMask paywall as GET; Pay retries POST with those items.

Example 200 (fixture)

{
  "count": 2,
  "path": "/api/calc/bars",
  "items": [
    {
      "components": [
        {
          "factor": "bars",
          "points": 4,
          "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": "Swift RH, Harrigan EP, Cappelleri JC, Kramer D, Chandler LP",
        "doi": "10.1016/s0022-3956(01)00052-8",
        "id": "swift-2002",
        "pmid": "11777497",
        "source": "J Psychiatr Res. 2002;36(2):87-95",
        "title": "Validation of the Behavioural Activity Rating Scale (BARS): a novel measure of activity in agitated patients"
      },
      "formula": "bars",
      "formula_expression": "BARS = caller-assigned integer 1, 2, 3, 4, 5, 6, or 7 (Swift 2002); max 7",
      "max_score": 7,
      "score": 4,
      "bars": 4,
      "bars_label": "quiet_and_awake"
    },
    {
      "components": [
        {
          "factor": "bars",
          "points": 4,
          "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": "Swift RH, Harrigan EP, Cappelleri JC, Kramer D, Chandler LP",
        "doi": "10.1016/s0022-3956(01)00052-8",
        "id": "swift-2002",
        "pmid": "11777497",
        "source": "J Psychiatr Res. 2002;36(2):87-95",
        "title": "Validation of the Behavioural Activity Rating Scale (BARS): a novel measure of activity in agitated patients"
      },
      "formula": "bars",
      "formula_expression": "BARS = caller-assigned integer 1, 2, 3, 4, 5, 6, or 7 (Swift 2002); max 7",
      "max_score": 7,
      "score": 4,
      "bars": 4,
      "bars_label": "quiet_and_awake"
    }
  ]
}

Response

Field Type Description
formula string bars
formula_expression string Published BARS integer rule
score integer Same as bars (1-7)
max_score integer 7
bars integer Caller-assigned Swift 2002 BARS integer 1-7
bars_label string Stable token for that integer: difficult_to_rouse, asleep_but_responds, drowsy_appears_sedated, quiet_and_awake, signs_of_overt_activity, extremely_or_continuously_active, or violent_requires_restraint
components array bars component
citation object Swift 2002
disclaimer string Not a medical device

Example JSON

Machine form of the same example. Frozen fixture. Not a live lookup. 

{
  "components": [
    {
      "factor": "bars",
      "points": 4,
      "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": "Swift RH, Harrigan EP, Cappelleri JC, Kramer D, Chandler LP",
    "doi": "10.1016/s0022-3956(01)00052-8",
    "id": "swift-2002",
    "pmid": "11777497",
    "source": "J Psychiatr Res. 2002;36(2):87-95",
    "title": "Validation of the Behavioural Activity Rating Scale (BARS): a novel measure of activity in agitated patients"
  },
  "formula": "bars",
  "formula_expression": "BARS = caller-assigned integer 1, 2, 3, 4, 5, 6, or 7 (Swift 2002); max 7",
  "max_score": 7,
  "score": 4,
  "bars": 4,
  "bars_label": "quiet_and_awake"
}

Client errors (HTTP 400)

Invalid params return 400 without charge. Shared HTTP 402 and 503 meanings: Payments.

HTTP Code When
400 invalid_bars BARS needs bars as an integer from 1 to 7 (Swift 2002). Returned before settlement; you are not charged.
400 invalid_items POST body must be a JSON object with only an items array Returned before settlement; you are not charged.
400 invalid_item_count items must be an array of 1 to 25 objects Returned before settlement; you are not charged.
400 invalid_item each items entry must be a JSON object Returned before settlement; you are not charged.

Related tools

  • RASS — Return the Sessler 2002 Richmond Agitation-Sedation Scale term and description from a caller-assigned integer -5 to +4.

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. Unpaid valid requests return HTTP 402 with a base64 PAYMENT-REQUIRED header. HTTP 503 is not a new quote: retry the same PAYMENT-SIGNATURE. Full handshake and shared payment errors: Payments. Stdio MCP: /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.