# NCI CTC v2.0 Stomatitis/Pharyngitis Grade Calculator

> NCI CTC v2.0 Stomatitis/Pharyngitis Grade 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).

Converts a caller-assigned oral/pharyngeal mucositis appearance description into an NCI CTC v2.0 stomatitis/pharyngitis grade (0–4)

## Facts

- Endpoint: GET https://api.magentlab.com/api/calc/nci_ctc_stomatitis
- 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/nci-ctc-v2-0-stomatitis-pharyngitis-grade-calculator-8bba3103
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_4Qc9eRKvhDWMhgu-2J6Hk

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 nci-ctc-v2-0-stomatitis-pharyngitis-grade-calculator-8bba3103
```

Example prompt: Grade this patient's stomatitis using NCI CTC v2.0 — they have painful erythema and ulcers but are still able to eat and swallow, so the appearance is painful_can_eat.

## When to prefer this

Use this endpoint when you need to programmatically assign an NCI CTC v2.0 (Trotti 2000) stomatitis/pharyngitis grade specifically — for example in clinical trial adverse event workflows, EHR automation, or toxicity dashboards. Do not use it for radiation mucositis (use the nci-ctc-mucositis endpoint), CTCAE catalog grading, or WHO oral toxicity scales.

## Known failure modes

- Invalid or misspelled appearance value — endpoint expects one of the five defined enum strings (case-insensitive); unrecognized values will return an error
- Missing required 'appearance' query parameter — will return a validation error
- Attempting to use this for radiation mucositis (NCI CTC Mucositis) — this endpoint covers chemotherapy-related stomatitis only, not radiation-induced mucositis

## How this service works

NCI CTC v2.0 stomatitis/pharyngitis (Trotti 2000). none → 0; painless_or_mild_soreness → 1; painful_can_eat → 2; painful_cannot_eat → 3; parenteral_or_prophylactic_intubation → 4. magent does not examine the mucosa. Not radiation mucositis (nci-ctc-mucositis), CTCAE catalog, or WHO. Not a diagnosis or medical device.

## Output

Returns the NCI CTC v2.0 stomatitis/pharyngitis integer grade (0–4) corresponding to the submitted appearance category: none→0, painless_or_mild_soreness→1, painful_can_eat→2, painful_cannot_eat→3, parenteral_or_prophylactic_intubation→4.

## 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": [
      "appearance"
     ],
     "properties": {
      "appearance": {
       "type": "string",
       "description": "NCI CTC v2.0 Stomatitis/pharyngitis (oral/pharyngeal mucositis) appearance as assigned by the caller: none (grade 0), painless_or_mild_soreness (grade 1, painless ulcers, erythema, or mild soreness in the absence of lesions), painful_can_eat (grade 2, painful erythema, edema or ulcers, but can eat or swallow), painful_cannot_eat (grade 3, painful erythema, edema or ulcers, and cannot eat or swallow), or parenteral_or_prophylactic_intubation (grade 4, severe ulceration or requires parenteral or enteral support or prophylactic intubation). Case-insensitive. Not CTC Mucositis due to radiation. magent does not examine the mucosa."
      }
     }
    }
   },
   "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/nci-ctc-v2-0-stomatitis-pharyngitis-grade-calculator-8bba3103/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)