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magent CDAI Calculator
x402
magent CDAI Calculator is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-13).
Computes the 1976 Best Crohn's Disease Activity Index (CDAI) as a rounded integer from eight weighted clinical variables
Price / call$0.005
Success—
StatusUnknown
How this service works
Best 1976 Crohn's disease activity index (CDAI): eight weighted variables (7-day liquid stools *2, abdominal-pain sum *5, well-being sum *7, extra-intestinal count *20, antidiarrheal *30, abdominal mass 0/2/5 *10, hematocrit deficit *6, caller-assigned weight-percent deviation). magent returns the rounded integer index only and does not apply later trial activity bands. magent does not examine the patient. Not a Crohn's diagnosis and not the Harvey-Bradshaw one-day index.
Output
A single rounded integer representing the Crohn's Disease Activity Index per the Best 1976 formula. Scores below 150 generally indicate remission; 150–220 mild; 220–450 moderate; above 450 severe — but the endpoint itself returns only the raw integer and does not label activity bands.
Example use cases
Crohn's flare severity assessment
“I need the CDAI score for a female patient: 7-day liquid stool count is 22, abdominal pain sum is 15, well-being sum is 21, 3 extra-intestinal findings, she is taking Lomotil, abdominal mass is questionable (grade 2), hematocrit is 38%, and her weight is 8% below ideal body weight.”
Clinical trial eligibility screening
“Can you compute the 1976 Best CDAI for a male participant — 7-day stool count 12, pain sum 7, wellbeing sum 10, 1 extra-intestinal count, no antidiarrheal, abdominal mass grade 0, hematocrit 45%, weight deviation 0%? I need to know if he clears 150 for the active disease threshold.”
Monitoring treatment response over time
“Run the CDAI for a female patient at her follow-up visit: liquid stools over 7 days is 8, abdominal pain sum 4, well-being sum 6, zero extra-intestinal manifestations, not on antidiarrheal, no abdominal mass, hematocrit 41%, and she's 2% under her ideal weight.”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/cdaiWhen to prefer
Use this endpoint when you need the original 1976 Best eight-variable CDAI score — especially for clinical research, trial eligibility checks, or longitudinal monitoring where the canonical formula matters. Do not use it if you need the simpler Harvey-Bradshaw Index (one-day, five-variable), if you need an interpreted severity band rather than a raw score, or if the patient's physical exam data (abdominal mass, weight) are unavailable.
Side effects
- Missing required query parameters returns an error
- abdominal_mass values other than 0, 2, or 5 are invalid
- hematocrit_percent outside 10–70 range rejected
- liquid_stool_count_7d or pain/wellbeing sums out of valid integer ranges rejected
- Invalid sex string (must be 'male' or 'female') causes error
- Payment not included or insufficient USDC results in 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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