MAGENT

Neurology · LIVE

BOPS (Hesselgard)

BOPS

Sum three caller-assigned Hesselgard 2007 BOPS integers (0-2) and return the published total (max 6).

LIVE $0.005 USDC GET /api/calc/bops

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

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

What it computes

Sum three caller-assigned Hesselgard 2007 BOPS integers (0-2) and return the published total (max 6).

When to use

When an agent has already assigned Hesselgard 2007 0-2 integers for facial expression, verbalization, and body position and needs the published total, not a pain diagnosis, analgesic order, or unpublished intensity cutoff.

When not to use

  • Not a medical device and not a pain diagnosis or analgesic order.
  • Each of the three items is a caller-assigned integer 0, 1, or 2 from Hesselgard 2007. magent does not observe the child.
  • Hesselgard 2007 described postoperative pain measurement in children 1-7 years. magent does not take an age parameter and does not restrict the caller.
  • Total is 0-6. magent does not emit an analgesic cutoff; Hesselgard 2007 did not name a ≥3 scoring band.
  • Not FLACC. Not Abbey.

Formula

BOPS = facial_expression + verbalization + body_position; each caller-assigned 0-2; max 6

Citation

Title
Validity and reliability of the Behavioural Observational Pain Scale for postoperative pain measurement in children 1-7 years of age
Authors
Hesselgard K, Larsson S, Romner B, Strömblad LG, Reinstrup P
Source
Pediatr Crit Care Med. 2007;8(2):102-108
DOI
10.1097/01.PCC.0000257098.32268.aa

Worked example

All items 0

Given: body_position=0facial_expression=0verbalization=0

  1. facial_expression 0 + verbalization 0 + body_position 0
  2. Score = 0 (max 6)

All items 2

Given: body_position=2facial_expression=2verbalization=2

  1. facial_expression 2 + verbalization 2 + body_position 2
  2. Score = 6 (max 6)

Also searched as

  • BOPS
  • Behavioural Observational Pain Scale
  • Behavioral Observational Pain Scale
  • Hesselgard BOPS
  • Hesselgard 2007
  • postoperative pain children 1-7
  • BOPS pediatric pain

Try

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

/api/calc/bops?facial_expression=0&verbalization=0&body_position=0

Full URL: https://api.magentlab.com/api/calc/bops?facial_expression=0&verbalization=0&body_position=0

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/bops?facial_expression=0&verbalization=0&body_position=0"

Parameters

Name Type Required Description
facial_expression integer required Caller-assigned Hesselgard 2007 BOPS facial expression (integer 0-2): 0 neutral/positive composed; 1 negative/concerned; 2 grimacing/distorted. magent does not observe the child.
verbalization integer required Caller-assigned Hesselgard 2007 BOPS verbalization (integer 0-2): 0 normal conversation/laughing/crowing; 1 completely quiet, sobbing, and/or complaining not because of pain; 2 crying, screaming, and/or complaining about pain. magent does not observe the child.
body_position integer required Caller-assigned Hesselgard 2007 BOPS body position (integer 0-2): 0 inactive, lying relaxed with all extremities or sitting/walking; 1 restless movements, shifting, and/or touching the wound area; 2 lying rigid and/or drawn up with arms and legs close to the body. magent does not observe the child.

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/bops 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": [
    {
      "body_position": "0",
      "facial_expression": "0",
      "verbalization": "0"
    },
    {
      "body_position": "0",
      "facial_expression": "0",
      "verbalization": "0"
    }
  ]
}

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/bops",
  "items": [
    {
      "components": [
        {
          "value": 0,
          "factor": "facial_expression",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "verbalization",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "body_position",
          "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": "Hesselgard K, Larsson S, Romner B, Strömblad LG, Reinstrup P",
        "doi": "10.1097/01.PCC.0000257098.32268.aa",
        "id": "hesselgard-2007",
        "pmid": "17273124",
        "source": "Pediatr Crit Care Med. 2007;8(2):102-108",
        "title": "Validity and reliability of the Behavioural Observational Pain Scale for postoperative pain measurement in children 1-7 years of age"
      },
      "formula": "bops",
      "formula_expression": "BOPS = facial_expression + verbalization + body_position; each caller-assigned 0-2; max 6",
      "max_score": 6,
      "score": 0,
      "body_position": 0,
      "facial_expression": 0,
      "verbalization": 0
    },
    {
      "components": [
        {
          "value": 0,
          "factor": "facial_expression",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "verbalization",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "body_position",
          "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": "Hesselgard K, Larsson S, Romner B, Strömblad LG, Reinstrup P",
        "doi": "10.1097/01.PCC.0000257098.32268.aa",
        "id": "hesselgard-2007",
        "pmid": "17273124",
        "source": "Pediatr Crit Care Med. 2007;8(2):102-108",
        "title": "Validity and reliability of the Behavioural Observational Pain Scale for postoperative pain measurement in children 1-7 years of age"
      },
      "formula": "bops",
      "formula_expression": "BOPS = facial_expression + verbalization + body_position; each caller-assigned 0-2; max 6",
      "max_score": 6,
      "score": 0,
      "body_position": 0,
      "facial_expression": 0,
      "verbalization": 0
    }
  ]
}

Response

Field Type Description
formula string bops
formula_expression string Exact expression used
score integer BOPS points 0-6
max_score integer Always 6
facial_expression integer Caller-assigned facial expression points 0-2
verbalization integer Caller-assigned verbalization points 0-2
body_position integer Caller-assigned body position points 0-2
components array Per-item caller-assigned points
citation object Hesselgard et al. Pediatr Crit Care Med 2007 citation
disclaimer string Not-a-device notice

Example JSON

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

{
  "components": [
    {
      "value": 0,
      "factor": "facial_expression",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "verbalization",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "body_position",
      "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": "Hesselgard K, Larsson S, Romner B, Strömblad LG, Reinstrup P",
    "doi": "10.1097/01.PCC.0000257098.32268.aa",
    "id": "hesselgard-2007",
    "pmid": "17273124",
    "source": "Pediatr Crit Care Med. 2007;8(2):102-108",
    "title": "Validity and reliability of the Behavioural Observational Pain Scale for postoperative pain measurement in children 1-7 years of age"
  },
  "formula": "bops",
  "formula_expression": "BOPS = facial_expression + verbalization + body_position; each caller-assigned 0-2; max 6",
  "max_score": 6,
  "score": 0,
  "body_position": 0,
  "facial_expression": 0,
  "verbalization": 0
}

Client errors (HTTP 400)

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

HTTP Code When
400 invalid_bops BOPS inputs must be the three caller-assigned 0-2 Hesselgard 2007 items (facial_expression, verbalization, body_position). 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

  • FLACC — Sum five caller-assigned Merkel 1997 FLACC integers (0-2) and return the published total (max 10).
  • Abbey Pain Scale — Sum six caller-assigned Abbey 2004 observational integers (0-3) and return the published total (max 18) and that paper's none/mild/moderate/severe bands.

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.