# Gillmore 2018 ATTR Cardiac Staging Calculator

> Gillmore 2018 ATTR Cardiac Staging Calculator is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Computes the Gillmore 2018 cardiac staging (I, II, or III) for ATTR amyloidosis (ATTRwt and ATTRv) from NT-proBNP and eGFR values

## Facts

- Endpoint: GET https://api.magentlab.com/api/calc/gillmore
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/gillmore-2018-attr-cardiac-staging-calculator-7529852f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Jwjw0OMlnU2YpKUxkZBFN

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 gillmore-2018-attr-cardiac-staging-calculator-7529852f
```

Example prompt: My ATTR amyloidosis patient has an NT-proBNP of 4200 ng/L and a pre-calculated eGFR of 38 mL/min/1.73m² — what is their Gillmore 2018 cardiac stage?

## When to prefer this

Use this endpoint when you need to apply the Gillmore 2018 NAC ATTR-specific cardiac staging system (Stage I/II/III) for ATTRwt or ATTRv patients based on NT-proBNP and eGFR. Do not use for AL amyloidosis (Mayo staging), NYHA classification, or when eGFR has not yet been calculated — this endpoint requires a pre-computed eGFR value and does not run MDRD or CKD-EPI itself.

## Known failure modes

- NT-proBNP outside range 10–100000 ng/L returns a validation error
- eGFR outside range 5–200 mL/min/1.73m² returns a validation error
- Missing required query parameters returns an error response
- This endpoint does not compute eGFR — caller must supply a pre-calculated eGFR value
- Passing AL amyloid patients will not yield a clinically valid result as this is ATTR-specific staging

## How this service works

Gillmore 2018 NAC ATTR cardiac staging from NT-proBNP (ng/L) and caller-assigned eGFR. Stage I: NT-proBNP <=3000 and eGFR >=45. Stage III: NT-proBNP >3000 and eGFR <45. Stage II: exactly one of those two adverse cut points. Returns gillmore_stage 1/2/3. ATTRwt and ATTRv. Not Mayo AL amyloid staging. Not NYHA. Not a treatment order. magent does not compute MDRD or CKD-EPI.

## Output

Returns a gillmore_stage value of 1, 2, or 3. Stage I: NT-proBNP ≤3000 ng/L AND eGFR ≥45. Stage III: NT-proBNP >3000 ng/L AND eGFR <45. Stage II: exactly one of those two adverse thresholds met. No treatment recommendations or additional computed values are included.

## 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": [
      "nt_probnp_ng_l",
      "egfr_ml_min_1_73m2"
     ],
     "properties": {
      "nt_probnp_ng_l": {
       "type": "number",
       "description": "NT-proBNP in ng/L (10-100000), same numeric value as pg/mL. Gillmore 2018 Stage I requires <= 3000; Stage III when > 3000. magent does not assay NT-proBNP."
      },
      "egfr_ml_min_1_73m2": {
       "type": "number",
       "description": "Caller-assigned eGFR in mL/min/1.73m² (5-200). Gillmore 2018 Stage I requires >= 45; Stage III when < 45. magent does not compute MDRD or CKD-EPI."
      }
     }
    }
   },
   "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/gillmore-2018-attr-cardiac-staging-calculator-7529852f/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)