LIVE

MAP

Compute conventional estimated mean arterial pressure from cuff systolic and diastolic pressures.

LIVE $0.005 USDC GET /api/calc/map

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

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

What it computes

Compute conventional estimated mean arterial pressure from cuff systolic and diastolic pressures.

When to use

When an agent needs the 1/3 pulse-pressure MAP estimate and must not invent a cuff MAP.

When not to use

• Not a treatment target. This is the conventional 1/3 pulse-pressure estimate from cuff pressures, not an invasive aortic mean.
• Does not apply arterial-line averaging, form-factor corrections, or blood-pressure treatment thresholds.

Formula

MAP_mm_hg = diastolic_mm_hg + (systolic_mm_hg - diastolic_mm_hg) / 3

Citation

Title

Systolic and diastolic blood pressure, pulse pressure, and mean arterial pressure as predictors of cardiovascular disease risk in men

Authors

Sesso HD, Stampfer MJ, Rosner B, et al.

Source

Hypertension. 2000;36(5):801-807

DOI

10.1161/01.HYP.36.5.801

Worked example

Try

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

/api/calc/map?systolic_mm_hg=120&diastolic_mm_hg=80

Full URL: https://api.magentlab.com/api/calc/map?systolic_mm_hg=120&diastolic_mm_hg=80

x402 V2 curl

Expect HTTP 402 and a PAYMENT-REQUIRED header until you retry with PAYMENT-SIGNATURE. Incomplete query params return HTTP 400 before any quote or charge. HTTP 503 after a signature: retry the same PAYMENT-SIGNATURE — that is not a new 402.

curl -i -H "Accept: application/json" "https://api.magentlab.com/api/calc/map?systolic_mm_hg=120&diastolic_mm_hg=80"

Cursor mcp.json

Intended config for @magent/mcp. This is not npm @x402/fetch (a payment fetch wrapper).

{
  "mcpServers": {
    "magent": {
      "args": [
        "-y",
        "@magent/mcp"
      ],
      "command": "npx",
      "env": {
        "X402_PRIVATE_KEY": "0xYOUR_SPENDING_KEY"
      }
    }
  }
}

Parameters

Bulk (POST)

POST the same path with a JSON items array. Price is n times the GET unit. Invalid items return HTTP 400 before settlement.

POST /api/calc/map Max 25 unit_amount * n PREVIEW

• 1 to 25 items. Each item uses the same keys as the GET query parameters.
• 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": [
    {
      "diastolic_mm_hg": "80",
      "systolic_mm_hg": "120"
    },
    {
      "diastolic_mm_hg": "80",
      "systolic_mm_hg": "120"
    }
  ]
}

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/map",
  "items": [
    {
      "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": "Sesso HD, Stampfer MJ, Rosner B, et al.",
        "doi": "10.1161/01.HYP.36.5.801",
        "id": "sesso-2000",
        "source": "Hypertension. 2000;36(5):801-807",
        "title": "Systolic and diastolic blood pressure, pulse pressure, and mean arterial pressure as predictors of cardiovascular disease risk in men"
      },
      "formula": "map",
      "formula_expression": "MAP_mm_hg = diastolic_mm_hg + (systolic_mm_hg - diastolic_mm_hg) / 3",
      "diastolic_mm_hg": 80.0,
      "map_mm_hg": 93.3,
      "pulse_pressure_mm_hg": 40.0,
      "systolic_mm_hg": 120.0
    },
    {
      "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": "Sesso HD, Stampfer MJ, Rosner B, et al.",
        "doi": "10.1161/01.HYP.36.5.801",
        "id": "sesso-2000",
        "source": "Hypertension. 2000;36(5):801-807",
        "title": "Systolic and diastolic blood pressure, pulse pressure, and mean arterial pressure as predictors of cardiovascular disease risk in men"
      },
      "formula": "map",
      "formula_expression": "MAP_mm_hg = diastolic_mm_hg + (systolic_mm_hg - diastolic_mm_hg) / 3",
      "diastolic_mm_hg": 80.0,
      "map_mm_hg": 93.3,
      "pulse_pressure_mm_hg": 40.0,
      "systolic_mm_hg": 120.0
    }
  ]
}

Response

Example JSON

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

{
  "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": "Sesso HD, Stampfer MJ, Rosner B, et al.",
    "doi": "10.1161/01.HYP.36.5.801",
    "id": "sesso-2000",
    "source": "Hypertension. 2000;36(5):801-807",
    "title": "Systolic and diastolic blood pressure, pulse pressure, and mean arterial pressure as predictors of cardiovascular disease risk in men"
  },
  "formula": "map",
  "formula_expression": "MAP_mm_hg = diastolic_mm_hg + (systolic_mm_hg - diastolic_mm_hg) / 3",
  "diastolic_mm_hg": 80.0,
  "map_mm_hg": 93.3,
  "pulse_pressure_mm_hg": 40.0,
  "systolic_mm_hg": 120.0
}

Errors

Related tools

• BMI — Compute Keys/Quetelet body-mass index from height and weight, plus a WHO adult band.
• QTc — Compute heart-rate-corrected QT using Bazett or Fridericia. The formula argument is required.

Also searched as

• mean arterial pressure
• MAP
• estimated MAP
• cuff MAP
• 1/3 pulse pressure MAP

Payment

Required query parameters must be present and valid. 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.

Guarantees

• Invalid query parameters return HTTP 400 before settlement. You are not charged.
• Settlement finishes before the tool executes (paymentFlow upfront). 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.