# BALL Score Calculator (Soumerai 2019) for Relapsed/Refractory CLL

> BALL Score Calculator (Soumerai 2019) for Relapsed/Refractory CLL 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 Soumerai 2019 BALL prognostic score (0–4) for relapsed or refractory CLL and returns a risk category (low, intermediate, or high) based on four caller-assigned boolean flags.

## Facts

- Endpoint: GET https://api.magentlab.com/api/calc/ball
- 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/ball-score-calculator-soumerai-2019-for-relapsed-refractory-cll-7511228d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5p-pMdJRrMT04m_QrVViV

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 ball-score-calculator-soumerai-2019-for-relapsed-refractory-cll-7511228d
```

Example prompt: Calculate the Soumerai 2019 BALL score for my relapsed CLL patient: beta-2-microglobulin is ≥5 mg/dL (true), LDH is above the lab ULN (true), no anemia (false), and last therapy was started more than 24 months ago (false).

## When to prefer this

Use this endpoint when you need a fast, deterministic computation of the Soumerai 2019 BALL score for a relapsed or refractory CLL patient and have already pre-evaluated the four lab/clinical criteria as booleans. Prefer this over manual calculation when automating oncology workflows or building clinical decision-support pipelines. Not appropriate if you need raw lab values interpreted or units converted (B2M mg/L vs mg/dL must be resolved by the caller).

## Known failure modes

- Missing required boolean query parameter returns a 400/validation error
- Passing numeric values instead of boolean true/false may be rejected
- Incorrect unit conversion (mg/L vs mg/dL for B2M) not caught by the API — caller must resolve units before flagging
- Network or payment authentication failure returns 402 or 5xx

## How this service works

Soumerai 2019 BALL score for relapsed or refractory CLL. Four caller-assigned 1-point flags (max 4): beta-2-microglobulin at the paper's published cutoff (>=5 mg/dL), LDH > laboratory ULN, anemia (Hb <110 g/L women or <120 g/L men), and time from initiation of last therapy <24 months. Risk low 0-1, intermediate 2-3, high 4. magent does not assay labs or convert B2M mg/L vs mg/dL. Not a treatment recommendation.

## Output

Returns a numeric BALL score (integer 0–4) and a risk category string — low (0–1), intermediate (2–3), or high (4) — based on the sum of the four boolean input flags. Does not provide treatment recommendations or lab assay results.

## 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": [
      "b2m_ge_5",
      "ldh_gt_uln",
      "anemia",
      "last_therapy_lt_24mo"
     ],
     "properties": {
      "anemia": {
       "type": "boolean",
       "description": "Anemia as assigned by the caller using Soumerai 2019 hemoglobin cutoffs (hemoglobin <110 g/L in women or <120 g/L in men). true or false. magent does not take a hemoglobin number or sex and does not assay hemoglobin."
      },
      "b2m_ge_5": {
       "type": "boolean",
       "description": "Serum β2-microglobulin at or above the Soumerai 2019 published cutoff (≥5 mg/dL) as assigned by the caller. true or false. magent does not assay B2M and does not convert mg/L versus mg/dL."
      },
      "ldh_gt_uln": {
       "type": "boolean",
       "description": "Serum LDH above the laboratory upper limit of normal as assigned by the caller (Soumerai 2019). true or false. magent does not assay LDH."
      },
      "last_therapy_lt_24mo": {
       "type": "boolean",
       "description": "Time from initiation of last therapy <24 months as assigned by the caller (Soumerai 2019). true or false. magent does not read a treatment calendar."
      }
     }
    }
   },
   "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/ball-score-calculator-soumerai-2019-for-relapsed-refractory-cll-7511228d/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)