# Mean Arterial Pressure (MAP) Calculator

> Mean Arterial Pressure (MAP) Calculator is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Calculates mean arterial pressure from cuff systolic and diastolic blood pressure using the conventional 1/3 pulse pressure formula (diastolic + pulse pressure / 3)

## Facts

- Endpoint: GET https://api.magentlab.com/api/calc/map
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/mean-arterial-pressure-map-calculator-d1e0e541
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_o-g00x6MTKb_QwkEqCB0F

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability mean-arterial-pressure-map-calculator-d1e0e541
```

Example prompt: What's the mean arterial pressure for a patient with a cuff blood pressure of 118 systolic and 76 diastolic?

## When to prefer this

Use this endpoint when you need a quick, deterministic, citable MAP estimate from standard noninvasive cuff blood pressure readings. Prefer it for clinical documentation, decision-support workflows, or automated chart calculations where the conventional 1/3 pulse pressure formula (Diastolic + PP/3) is the accepted standard. Do not use if an invasive aortic mean or arterial-line-derived MAP is required.

## Known failure modes

- Missing systolic_mm_hg or diastolic_mm_hg parameters returns validation error
- Diastolic value greater than or equal to systolic value triggers invalid input error
- Values outside accepted ranges (systolic 50-250, diastolic 20-160) may be rejected
- Non-numeric input types cause schema validation failure

## How this service works

Mean arterial pressure from cuff systolic and diastolic BP using diastolic + pulse pressure / 3. Conventional 1/3 estimate, not an invasive aortic mean. Deterministic published arithmetic with citation; not a treatment target.

## Output

Returns a numerically computed mean arterial pressure value in mm Hg, derived using the Diastolic + (Pulse Pressure / 3) formula. The result is a deterministic arithmetic calculation based on the conventional 1/3 estimate from noninvasive cuff measurements, with a citation to the published methodology. It is not an invasive aortic mean and should not be interpreted as a treatment target.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "headers": {
     "type": "object",
     "additionalProperties": {
      "type": "string"
     }
    },
    "queryParams": {
     "type": "object",
     "required": [
      "systolic_mm_hg",
      "diastolic_mm_hg"
     ],
     "properties": {
      "systolic_mm_hg": {
       "type": "number",
       "description": "Cuff systolic blood pressure in mm Hg (50-250)."
      },
      "diastolic_mm_hg": {
       "type": "number",
       "description": "Cuff diastolic blood pressure in mm Hg (20-160). Must be less than systolic."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "path": "/api/calc/map",
  "count": 2,
  "items": [
   {
    "formula": "map",
    "citation": {
     "id": "sesso-2000",
     "doi": "10.1161/01.HYP.36.5.801",
     "title": "Systolic and diastolic blood pressure, pulse pressure, and mean arterial pressure as predictors of cardiovascular disease risk in men",
     "source": "Hypertension. 2000;36(5):801-807",
     "authors": "Sesso HD, Stampfer MJ, Rosner B, et al."
    },
    "map_mm_hg": 93.3,
    "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.",
    "systolic_mm_hg": 120,
    "diastolic_mm_hg": 80,
    "formula_expression": "MAP_mm_hg = diastolic_mm_hg + (systolic_mm_hg - diastolic_mm_hg) / 3",
    "pulse_pressure_mm_hg": 40
   },
   {
    "formula": "map",
    "citation": {
     "id": "sesso-2000",
     "doi": "10.1161/01.HYP.36.5.801",
     "title": "Systolic and diastolic blood pressure, pulse pressure, and mean arterial pressure as predictors of cardiovascular disease risk in men",
     "source": "Hypertension. 2000;36(5):801-807",
     "authors": "Sesso HD, Stampfer MJ, Rosner B, et al."
    },
    "map_mm_hg": 93.3,
    "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.",
    "systolic_mm_hg": 120,
    "diastolic_mm_hg": 80,
    "formula_expression": "MAP_mm_hg = diastolic_mm_hg + (systolic_mm_hg - diastolic_mm_hg) / 3",
    "pulse_pressure_mm_hg": 40
   }
  ]
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/mean-arterial-pressure-map-calculator-d1e0e541/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.magentlab.com](https://www.zero.xyz/host/api.magentlab.com/llms.txt)