# Miller 1983 ESR Upper Limit Calculator

> Miller 1983 ESR Upper Limit 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 the adult maximum normal erythrocyte sedimentation rate (ESR) threshold in mm/h using the Miller 1983 age- and sex-based formula

## Facts

- Endpoint: GET https://api.magentlab.com/api/calc/miller_esr
- 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/miller-1983-esr-upper-limit-calculator-50fe2ab5
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HIYV1y7HvImbH_bh9-Mj1

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 miller-1983-esr-upper-limit-calculator-50fe2ab5
```

Example prompt: Using the Miller 1983 formula, what is the maximum normal ESR for a 68-year-old female patient?

## When to prefer this

Use this endpoint when you need the Miller 1983 age- and sex-adjusted ESR upper limit of normal for an adult patient (ages 20–90). It is the right choice when you need a quick, deterministic, evidence-based reference threshold rather than a diagnosis or a measured ESR result. Prefer this over general medical knowledge lookups when you need a citable, formula-based value with a known provenance (Miller 1983 publication). Do not use this to measure ESR, interpret CRP, or handle pediatric patients.

## Known failure modes

- Age outside the 20-90 adult range may return an error or out-of-range response
- Invalid or missing 'sex' enum value (must be 'male' or 'female') will cause a validation error
- Non-integer age values will be rejected by the schema
- Missing required query parameters (age or sex) will result in a request error
- Payment failure (x402) will block the response

## How this service works

Adult maximum normal erythrocyte sedimentation rate (mm/h, 98th percentile approximation) from age and sex (Miller 1983). Men: age/2. Women: (age + 10)/2. Deterministic published arithmetic with citation. Returns the threshold only; not a diagnosis, not a measured ESR, and not Wener 2000 CRP. magent does not measure ESR.

## Output

Returns the calculated upper limit of normal ESR in mm/h (98th percentile approximation) for the given age and sex, using the published Miller 1983 formulas: men = age/2, women = (age+10)/2. This is a reference threshold value only — not a diagnosis, not a measured ESR value, and not based on CRP or any other marker.

## 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": [
      "age",
      "sex"
     ],
     "properties": {
      "age": {
       "type": "integer",
       "description": "Age in years (integer 20-90). Miller 1983 adult range."
      },
      "sex": {
       "enum": [
        "female",
        "male"
       ],
       "type": "string",
       "description": "Sex for the published rule (female or male)."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/miller-1983-esr-upper-limit-calculator-50fe2ab5/health.json
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