# Travis 1996 Ulcerative Colitis Severity (Day 3 IV Steroids)

> Travis 1996 Ulcerative Colitis Severity (Day 3 IV Steroids) 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).

Calculates the Travis 1996 day-3 intravenous steroid response criterion for severe ulcerative colitis, returning whether the patient is classified as 'travis_high' risk based on stool frequency and CRP.

## Facts

- Endpoint: GET https://api.magentlab.com/api/calc/travis
- 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/travis-1996-ulcerative-colitis-severity-day-3-iv-steroids-c0dd892e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__HiScLYnxaeUNZDsNQwFl

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 travis-1996-ulcerative-colitis-severity-day-3-iv-steroids-c0dd892e
```

Example prompt: My UC patient on day 3 of IV steroids is having 6 stools per day and their CRP is 52 mg/L — can you run the Travis 1996 criterion and tell me if they're classified as high risk?

## When to prefer this

Use this endpoint specifically when you need the Travis 1996 day-3 IV steroid response criterion for severe ulcerative colitis, given stool count and CRP in mg/L. Prefer this over general IBD scoring when the clinical question is precisely whether a patient meets the Travis high-risk threshold on day 3 of intravenous steroids. Do not use for Truelove and Witts classification, Ho score, or colectomy decision support.

## Known failure modes

- Missing required parameter (stools_per_day or crp_mg_l) returns an error
- crp_mg_l provided in mg/dL instead of mg/L yields incorrect classification
- Non-integer stools_per_day rejected by schema
- Values outside valid ranges (stools 0-40, CRP 0-500) may be rejected or produce unexpected results

## How this service works

Travis 1996 day-3 of intravenous steroids for severe ulcerative colitis. travis_high is true when stools_per_day > 8, or when stools_per_day is 3 to 8 inclusive and crp_mg_l > 45. Stools 8 with CRP 45 is not high. Stools 2 with high CRP is not high. Both parameters are required. Not a colectomy order, not the Ho score, and not Truelove and Witts. magent does not count stools or measure CRP.

## Output

Returns a boolean 'travis_high' flag: true if stools_per_day > 8, or if stools_per_day is between 3 and 8 inclusive AND crp_mg_l > 45; false otherwise. Does not produce a colectomy recommendation, a Ho score, or a Truelove and Witts classification.

## 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": [
      "stools_per_day",
      "crp_mg_l"
     ],
     "properties": {
      "crp_mg_l": {
       "type": "number",
       "description": "C-reactive protein in mg/L (0-500), not mg/dL. Travis 1996 CRP arm is crp_mg_l > 45 when stools_per_day is 3 to 8 inclusive. CRP = 45 is not high on that arm. magent does not assay CRP."
      },
      "stools_per_day": {
       "type": "integer",
       "description": "Number of stools (motions) per day as assigned by the caller (integer 0-40). Travis 1996 high is stools_per_day > 8, or stools_per_day 3 to 8 inclusive with CRP > 45 mg/L. Both parameters are required. magent does not count stools."
      }
     }
    }
   },
   "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/travis-1996-ulcerative-colitis-severity-day-3-iv-steroids-c0dd892e/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)