Neonatal · LIVE

Fetal biophysical profile (Manning)

Fetal biophysical profile

Sum the five Manning 1980 fetal biophysical profile variables, each 2 if the caller assigns normal and 0 if abnormal, and return score 0-10.

LIVE $0.005 USDC GET /api/calc/bpp

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

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

What it computes

Sum the five Manning 1980 fetal biophysical profile variables, each 2 if the caller assigns normal and 0 if abnormal, and return score 0-10.

When to use

When an agent already has caller-assigned Manning 1980 normal-or-abnormal flags for the five biophysical variables and needs the published 0-10 total, not a delivery order, ultrasound, or later management band.

When not to use

• Not a medical device and not a delivery, induction, or cesarean order.
• magent does not ultrasound and does not record a nonstress test. Each variable is a caller-assigned normal (true, 2 points) or abnormal (false, 0 points) flag using Manning 1980 definitions.
• Manning 1980 normal fetal breathing is at least one 60-second episode in 30 minutes; qualitative amniotic fluid is a 1 cm pocket in two perpendicular planes. Later 30-second breathing and 2 cm pocket cuts are not used.
• Manning 1980 reported perinatal mortality from 0 when all five were normal to 600 per 1,000 when all were abnormal. It did not print later 8-10 / 6 / ≤4 management bands. magent emits score 0-10 and components only.

Formula

BPP = 2*(fetal_breathing_movements) + 2*(fetal_movements) + 2*(fetal_tone) + 2*(qualitative_amniotic_fluid_volume) + 2*(nonstress_test); each 2 if Manning 1980 normal else 0; max 10

Citation

Title

Antepartum fetal evaluation: development of a fetal biophysical profile

Authors

Manning FA, Platt LD, Sipos L

Source

Am J Obstet Gynecol. 1980;136(6):787-795

DOI

10.1016/0002-9378(80)90457-3

Worked example

Also searched as

• fetal biophysical profile
• Manning biophysical profile
• BPP score
• fetal BPP
• antepartum biophysical profile
• Manning 1980 BPP
• biophysical profile score

Try

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

/api/calc/bpp?fetal_breathing_movements=true&fetal_movements=true&fetal_tone=true&qualitative_amniotic_fluid_volume=true&nonstress_test=true

Full URL: https://api.magentlab.com/api/calc/bpp?fetal_breathing_movements=true&fetal_movements=true&fetal_tone=true&qualitative_amniotic_fluid_volume=true&nonstress_test=true

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/bpp?fetal_breathing_movements=true&fetal_movements=true&fetal_tone=true&qualitative_amniotic_fluid_volume=true&nonstress_test=true"

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/bpp 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": [
    {
      "fetal_breathing_movements": "true",
      "fetal_movements": "true",
      "fetal_tone": "true",
      "nonstress_test": "true",
      "qualitative_amniotic_fluid_volume": "true"
    },
    {
      "fetal_breathing_movements": "true",
      "fetal_movements": "true",
      "fetal_tone": "true",
      "nonstress_test": "true",
      "qualitative_amniotic_fluid_volume": "true"
    }
  ]
}

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/bpp",
  "items": [
    {
      "components": [
        {
          "factor": "fetal_breathing_movements",
          "points": 2,
          "present": true
        },
        {
          "factor": "fetal_movements",
          "points": 2,
          "present": true
        },
        {
          "factor": "fetal_tone",
          "points": 2,
          "present": true
        },
        {
          "factor": "qualitative_amniotic_fluid_volume",
          "points": 2,
          "present": true
        },
        {
          "factor": "nonstress_test",
          "points": 2,
          "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": "Manning FA, Platt LD, Sipos L",
        "doi": "10.1016/0002-9378(80)90457-3",
        "id": "manning-1980",
        "pmid": "7355965",
        "source": "Am J Obstet Gynecol. 1980;136(6):787-795",
        "title": "Antepartum fetal evaluation: development of a fetal biophysical profile"
      },
      "formula": "bpp",
      "formula_expression": "BPP = 2*(fetal_breathing_movements) + 2*(fetal_movements) + 2*(fetal_tone) + 2*(qualitative_amniotic_fluid_volume) + 2*(nonstress_test); each 2 if Manning 1980 normal else 0; max 10",
      "max_score": 10,
      "score": 10
    },
    {
      "components": [
        {
          "factor": "fetal_breathing_movements",
          "points": 2,
          "present": true
        },
        {
          "factor": "fetal_movements",
          "points": 2,
          "present": true
        },
        {
          "factor": "fetal_tone",
          "points": 2,
          "present": true
        },
        {
          "factor": "qualitative_amniotic_fluid_volume",
          "points": 2,
          "present": true
        },
        {
          "factor": "nonstress_test",
          "points": 2,
          "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": "Manning FA, Platt LD, Sipos L",
        "doi": "10.1016/0002-9378(80)90457-3",
        "id": "manning-1980",
        "pmid": "7355965",
        "source": "Am J Obstet Gynecol. 1980;136(6):787-795",
        "title": "Antepartum fetal evaluation: development of a fetal biophysical profile"
      },
      "formula": "bpp",
      "formula_expression": "BPP = 2*(fetal_breathing_movements) + 2*(fetal_movements) + 2*(fetal_tone) + 2*(qualitative_amniotic_fluid_volume) + 2*(nonstress_test); each 2 if Manning 1980 normal else 0; max 10",
      "max_score": 10,
      "score": 10
    }
  ]
}

Response

Example JSON

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

{
  "components": [
    {
      "factor": "fetal_breathing_movements",
      "points": 2,
      "present": true
    },
    {
      "factor": "fetal_movements",
      "points": 2,
      "present": true
    },
    {
      "factor": "fetal_tone",
      "points": 2,
      "present": true
    },
    {
      "factor": "qualitative_amniotic_fluid_volume",
      "points": 2,
      "present": true
    },
    {
      "factor": "nonstress_test",
      "points": 2,
      "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": "Manning FA, Platt LD, Sipos L",
    "doi": "10.1016/0002-9378(80)90457-3",
    "id": "manning-1980",
    "pmid": "7355965",
    "source": "Am J Obstet Gynecol. 1980;136(6):787-795",
    "title": "Antepartum fetal evaluation: development of a fetal biophysical profile"
  },
  "formula": "bpp",
  "formula_expression": "BPP = 2*(fetal_breathing_movements) + 2*(fetal_movements) + 2*(fetal_tone) + 2*(qualitative_amniotic_fluid_volume) + 2*(nonstress_test); each 2 if Manning 1980 normal else 0; max 10",
  "max_score": 10,
  "score": 10
}

Client errors (HTTP 400)

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

Related tools

• Apgar score — Compute the Apgar newborn evaluation score as the sum of five caller-assigned 0-2 signs.

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.