# Fong 1999 Clinical Risk Score for Hepatic Resection (Colorectal Metastases)

> Fong 1999 Clinical Risk Score for Hepatic Resection (Colorectal Metastases) is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).

Computes the Fong 1999 five-factor preoperative clinical risk score (0–5) for patients undergoing hepatic resection for metastatic colorectal cancer, and flags whether the score is favorable (≤2).

## Facts

- Endpoint: GET https://api.magentlab.com/api/calc/fong
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fong-1999-clinical-risk-score-for-hepatic-resection-colorectal-2a118510
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yvjOnLKe77oq_TKj3eIi5

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 fong-1999-clinical-risk-score-for-hepatic-resection-colorectal-2a118510
```

Example prompt: Calculate the Fong 1999 hepatic resection score for a patient with a node-positive primary, disease-free interval under 12 months, only one hepatic tumor, largest tumor is 4 cm, and CEA of 150 ng/mL — is the score favorable?

## When to prefer this

Use this endpoint when you need a reliable, automated implementation of the published Fong 1999 five-criterion clinical risk score specifically for colorectal cancer hepatic resection prognosis. Prefer it over manual calculation in agentic or pipeline workflows where reproducibility matters. Note: this endpoint only performs the arithmetic scoring — it does not assess resectability, interpret imaging, or recommend adjuvant therapy.

## Known failure modes

- Missing required boolean parameter returns a validation error
- Non-boolean value for a flag field causes a schema error
- Equality at a threshold (e.g. CEA exactly 200, DFI exactly 12 months) must be pre-resolved by the caller — the API does not adjudicate borderline values
- Network timeout or 402 payment failure if USDC balance is insufficient

## How this service works

Fong 1999 clinical score after hepatic resection for metastatic colorectal cancer: five caller-assigned preoperative flags (node-positive primary, disease-free interval <12 months, more than one hepatic tumor, largest tumor >5 cm, CEA >200 ng/mL), 1 point each, score 0–5. favorable is true iff score ≤2. Not a resectability decision or adjuvant protocol. magent does not interpret imaging or pathology.

## Output

Returns the integer Fong clinical risk score (0–5) summed from the five boolean risk factors, plus a 'favorable' boolean indicating whether the score is ≤2, along with the individual flag values used in the computation.

## 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": [
      "node_positive_primary",
      "dfi_lt_12_months",
      "more_than_one_hepatic_tumor",
      "largest_tumor_gt_5_cm",
      "cea_gt_200"
     ],
     "properties": {
      "cea_gt_200": {
       "type": "boolean",
       "description": "CEA >200 ng/mL (Fong 1999). Caller already applied the published threshold; equality at 200 ng/mL does not meet. true or false."
      },
      "dfi_lt_12_months": {
       "type": "boolean",
       "description": "Disease-free interval from primary to metastases <12 months (Fong 1999). Caller already applied the published threshold; equality at 12 months does not meet. true or false."
      },
      "largest_tumor_gt_5_cm": {
       "type": "boolean",
       "description": "Largest hepatic tumor >5 cm (Fong 1999). Caller already applied the published threshold; equality at 5 cm does not meet. true or false."
      },
      "node_positive_primary": {
       "type": "boolean",
       "description": "Node-positive primary (Fong 1999). true or false as assigned by the caller. magent does not interpret pathology."
      },
      "more_than_one_hepatic_tumor": {
       "type": "boolean",
       "description": "More than one hepatic tumor (Fong 1999). true or false as assigned by the caller. magent does not interpret imaging."
      }
     }
    }
   },
   "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/fong-1999-clinical-risk-score-for-hepatic-resection-colorectal-2a118510/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)