Emergency · LIVE

CHEOPS (McGrath)

CHEOPS

Sum six caller-assigned McGrath 1985 CHEOPS category integers and return the published total (range 4-13).

LIVE $0.005 USDC GET /api/calc/cheops

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

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

What it computes

Sum six caller-assigned McGrath 1985 CHEOPS category integers and return the published total (range 4-13).

When to use

When an agent has already assigned McGrath 1985 CHEOPS integers for cry, facial, child_verbal, torso, touch, and legs and needs the published total, not a pain diagnosis, analgesic order, FLACC, BOPS, or an invented treatment-threshold cutoff.

When not to use

• Not a medical device and not a pain diagnosis or analgesic order.
• Each of the six categories is a caller-assigned integer from the McGrath 1985 table. magent does not observe the child.
• Cry is 1, 2, or 3 (0 is not published). Facial and child_verbal are 0, 1, or 2. Torso, touch, and legs are 1 or 2 (0 is not published). Both-complaints maps to child_verbal 2; there is no published verbal 3.
• Published total is 4 (no pain) to 13 (worst pain). magent does not emit later treatment-threshold cutoffs.
• McGrath 1985 described postoperative pain rating in children. magent does not take an age parameter. Not FLACC. Not BOPS.

Formula

CHEOPS = cry + facial + child_verbal + torso + touch + legs; McGrath 1985 published integers; min 4, max 13

Citation

Title

CHEOPS: a behavioral scale for rating postoperative pain in children

Authors

McGrath PJ, Johnson G, Goodman JT, Schillinger J, Dunn J, Chapman J

Source

In: Fields HL, ed. Advances in Pain Research and Therapy. Vol 9. New York: Raven Press; 1985:395-402

DOI

10.1016/0304-3959(84)90167-2

Worked example

Also searched as

• CHEOPS
• Children's Hospital of Eastern Ontario Pain Scale
• McGrath CHEOPS
• CHEOPS scale
• postoperative pain children
• McGrath 1985 CHEOPS
• behavioral pain children
• CHEOPS cry facial verbal

Try

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

/api/calc/cheops?cry=1&facial=0&child_verbal=0&torso=1&touch=1&legs=1

Full URL: https://api.magentlab.com/api/calc/cheops?cry=1&facial=0&child_verbal=0&torso=1&touch=1&legs=1

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/cheops?cry=1&facial=0&child_verbal=0&torso=1&touch=1&legs=1"

Parameters

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/cheops 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": [
    {
      "child_verbal": "0",
      "cry": "1",
      "facial": "0",
      "legs": "1",
      "torso": "1",
      "touch": "1"
    },
    {
      "child_verbal": "0",
      "cry": "1",
      "facial": "0",
      "legs": "1",
      "torso": "1",
      "touch": "1"
    }
  ]
}

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/cheops",
  "items": [
    {
      "components": [
        {
          "value": 1,
          "factor": "cry",
          "points": 1,
          "present": true
        },
        {
          "value": 0,
          "factor": "facial",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "child_verbal",
          "points": 0,
          "present": true
        },
        {
          "value": 1,
          "factor": "torso",
          "points": 1,
          "present": true
        },
        {
          "value": 1,
          "factor": "touch",
          "points": 1,
          "present": true
        },
        {
          "value": 1,
          "factor": "legs",
          "points": 1,
          "present": true
        }
      ],
      "touch": 1,
      "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": "McGrath PJ, Johnson G, Goodman JT, Schillinger J, Dunn J, Chapman J",
        "doi": "10.1016/0304-3959(84)90167-2",
        "id": "mcgrath-1985",
        "source": "In: Fields HL, ed. Advances in Pain Research and Therapy. Vol 9. New York: Raven Press; 1985:395-402",
        "title": "CHEOPS: a behavioral scale for rating postoperative pain in children"
      },
      "formula": "cheops",
      "formula_expression": "CHEOPS = cry + facial + child_verbal + torso + touch + legs; McGrath 1985 published integers; min 4, max 13",
      "max_score": 13,
      "score": 4,
      "child_verbal": 0,
      "cry": 1,
      "facial": 0,
      "legs": 1,
      "torso": 1
    },
    {
      "components": [
        {
          "value": 1,
          "factor": "cry",
          "points": 1,
          "present": true
        },
        {
          "value": 0,
          "factor": "facial",
          "points": 0,
          "present": true
        },
        {
          "value": 0,
          "factor": "child_verbal",
          "points": 0,
          "present": true
        },
        {
          "value": 1,
          "factor": "torso",
          "points": 1,
          "present": true
        },
        {
          "value": 1,
          "factor": "touch",
          "points": 1,
          "present": true
        },
        {
          "value": 1,
          "factor": "legs",
          "points": 1,
          "present": true
        }
      ],
      "touch": 1,
      "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": "McGrath PJ, Johnson G, Goodman JT, Schillinger J, Dunn J, Chapman J",
        "doi": "10.1016/0304-3959(84)90167-2",
        "id": "mcgrath-1985",
        "source": "In: Fields HL, ed. Advances in Pain Research and Therapy. Vol 9. New York: Raven Press; 1985:395-402",
        "title": "CHEOPS: a behavioral scale for rating postoperative pain in children"
      },
      "formula": "cheops",
      "formula_expression": "CHEOPS = cry + facial + child_verbal + torso + touch + legs; McGrath 1985 published integers; min 4, max 13",
      "max_score": 13,
      "score": 4,
      "child_verbal": 0,
      "cry": 1,
      "facial": 0,
      "legs": 1,
      "torso": 1
    }
  ]
}

Response

Example JSON

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

{
  "components": [
    {
      "value": 1,
      "factor": "cry",
      "points": 1,
      "present": true
    },
    {
      "value": 0,
      "factor": "facial",
      "points": 0,
      "present": true
    },
    {
      "value": 0,
      "factor": "child_verbal",
      "points": 0,
      "present": true
    },
    {
      "value": 1,
      "factor": "torso",
      "points": 1,
      "present": true
    },
    {
      "value": 1,
      "factor": "touch",
      "points": 1,
      "present": true
    },
    {
      "value": 1,
      "factor": "legs",
      "points": 1,
      "present": true
    }
  ],
  "touch": 1,
  "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": "McGrath PJ, Johnson G, Goodman JT, Schillinger J, Dunn J, Chapman J",
    "doi": "10.1016/0304-3959(84)90167-2",
    "id": "mcgrath-1985",
    "source": "In: Fields HL, ed. Advances in Pain Research and Therapy. Vol 9. New York: Raven Press; 1985:395-402",
    "title": "CHEOPS: a behavioral scale for rating postoperative pain in children"
  },
  "formula": "cheops",
  "formula_expression": "CHEOPS = cry + facial + child_verbal + torso + touch + legs; McGrath 1985 published integers; min 4, max 13",
  "max_score": 13,
  "score": 4,
  "child_verbal": 0,
  "cry": 1,
  "facial": 0,
  "legs": 1,
  "torso": 1
}

Client errors (HTTP 400)

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

Related tools

• FLACC — Sum five caller-assigned Merkel 1997 FLACC integers (0-2) and return the published total (max 10).
• BOPS — Sum three caller-assigned Hesselgard 2007 BOPS integers (0-2) and return the published total (max 6).

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.