# BOPS (Hesselgard) BOPS Status: LIVE Price: $0.005 USDC `GET /api/calc/bops` HTML: https://magentlab.com/docs/bops Markdown: https://magentlab.com/docs/bops.md 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expression, verbalization, and body position and needs the published total, not a pain diagnosis, analgesic order, or unpublished intensity cutoff.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 [Validity and reliability of the Behavioural Observational Pain Scale for postoperative pain measurement in children 1-7 years of age](https://doi.org/10.1097/01.PCC.0000257098.32268.aa) Hesselgard K, Larsson S, Romner B, Strömblad LG, Reinstrup P Pediatr Crit Care Med. 2007;8(2):102-108 DOI: [10.1097/01.PCC.0000257098.32268.aa](https://doi.org/10.1097/01.PCC.0000257098.32268.aa) ## Worked example ### All items 0 Given: `body_position=0, facial_expression=0, verbalization=0` 1. facial_expression 0 + verbalization 0 + body_position 0 2. Score = 0 (max 6) ### All items 2 Given: `body_position=2, facial_expression=2, verbalization=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 ## Parameters - `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. Method: `POST /api/calc/bops` 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": [ { "body_position": "0", "facial_expression": "0", "verbalization": "0" }, { "body_position": "0", "facial_expression": "0", "verbalization": "0" } ] } ``` Human paywall (two-item fixture): https://api.magentlab.com/paywall/bulk/bops Example 200: ```json { "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 fields - `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 Frozen fixture. Not a live lookup. ```json { "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 } ``` ## Errors - HTTP 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. - 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 - [FLACC](https://magentlab.com/docs/flacc) — Sum five caller-assigned Merkel 1997 FLACC integers (0-2) and return the published total (max 10). - [Abbey Pain Scale](https://magentlab.com/docs/abbey) — 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. - 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.