# Fuhrman Nuclear Grade Lookup (Renal Cell Carcinoma)

> Fuhrman Nuclear Grade Lookup (Renal Cell Carcinoma) 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).

Returns the Fuhrman 1982 nuclear grade description for renal cell carcinoma given a caller-assigned grade integer (1–4).

## Facts

- Endpoint: GET https://api.magentlab.com/api/calc/fuhrman
- 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/fuhrman-nuclear-grade-lookup-renal-cell-carcinoma-6f08de9c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mJlA3mSn6F7H7IMHUQXai

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 fuhrman-nuclear-grade-lookup-renal-cell-carcinoma-6f08de9c
```

Example prompt: The pathologist assigned a Fuhrman nuclear grade of 3 to this renal cell carcinoma specimen — can you pull the published 1982 nuclear feature description for Fuhrman grade 3?

## When to prefer this

Choose this endpoint when you need to programmatically retrieve the canonical Fuhrman 1982 nuclear grade description for renal cell carcinoma given a pathologist-assigned integer grade. It is not a diagnostic tool, does not read slides, does not apply WHO/ISUP 2016 criteria, and should not be used as a substitute for pathology interpretation. Prefer it for structured data enrichment, report generation, or clinical documentation pipelines where the grade has already been assigned by a qualified pathologist.

## Known failure modes

- Invalid grade value (0, 5, non-integer like 1.5, or Roman numerals) — API rejects input; only integers 1–4 are accepted
- Missing fuhrman_grade query parameter — request fails validation
- Network or service unavailability — standard HTTP error response

## How this service works

Fuhrman 1982 nuclear grade for renal cell carcinoma as assigned by the caller (grades 1-4). Returns the grade and the published nuclear-feature description. magent does not read slides. Not WHO/ISUP 2016. Not an RCC diagnosis. Not a medical device.

## Output

Returns the submitted Fuhrman grade integer (1–4) along with the published 1982 nuclear feature description for that grade (e.g., for grade 3: nuclei approximately 20 μm with obvious irregular outlines and nucleoli prominent at ×100 magnification).

## 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": [
      "fuhrman_grade"
     ],
     "properties": {
      "fuhrman_grade": {
       "type": "integer",
       "description": "Fuhrman 1982 nuclear grade 1-4 as assigned by the caller (1 small ~10 μm round uniform nuclei, nucleoli absent or inconspicuous; 2 larger ~15 μm nuclei with outline irregularities, nucleoli visible at ×400; 3 even larger ~20 μm with obvious irregular outline, nucleoli prominent at ×100; 4 as for grade 3 with bizarre often multilobed nuclei ± spindle cells). Integer 1-4 only; reject 0, 5, 1.5, and roman I. Not WHO/ISUP 2016. magent does not read slides."
      }
     }
    }
   },
   "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/fuhrman-nuclear-grade-lookup-renal-cell-carcinoma-6f08de9c/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)