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magent SDAI Calculator
x402
magent SDAI Calculator is a paid API for AI agents from api.magentlab.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Computes the Simplified Disease Activity Index (SDAI) score and disease activity state from swollen joint count, tender joint count, patient global, evaluator global, and CRP.
Price / call$0.005
Success—
StatusUnknown
How this service works
Aletaha 2005 Simplified Disease Activity Index (SDAI): sjc28 + tjc28 + patient global (0–10 cm) + evaluator global (0–10 cm) + CRP mg/dL. Newly proposed states: ≤3.3 remission, ≤11 low, ≤26 moderate, >26 high (not original 5/20/40). magent does not count joints or assay CRP. Not CDAI. Not a rheumatoid arthritis diagnosis.
Output
Returns the computed SDAI numeric score (sum of SJC28 + TJC28 + PGA + EGA + CRP in mg/dL) and a disease activity state classification: remission (≤3.3), low (≤11), moderate (≤26), or high (>26) using Aletaha 2005 thresholds as modified by magent.
Example use cases
Pre-visit disease activity check
“Before the rheumatology appointment, calculate this patient's SDAI: sjc28 is 2, tjc28 is 6, patient global is 3.0, evaluator global is 2.5, CRP is 0.8 mg/dL — are they in remission?”
Treatment response monitoring
“My RA patient had a flare last month — now sjc28 is 8, tjc28 is 12, patient global 7.0, evaluator global 6.5, CRP 2.4 mg/dL. Compute the SDAI and tell me if they're still in the high disease activity range.”
Clinical trial eligibility screening
“I need to check if this patient qualifies for moderate-to-high disease activity inclusion: sjc28 = 5, tjc28 = 9, pga = 6.0, ega = 5.5, CRP = 1.8 mg/dL. What does the SDAI say?”
Technical details
Endpoint
GEThttps://api.magentlab.com/api/calc/sdaiWhen to prefer
Use this endpoint when you need a fast, automated SDAI computation from caller-supplied clinical values (joint counts, VAS globals, CRP in mg/dL) and want a discrete disease activity state alongside the numeric score. Prefer this over manual calculation or CDAI when CRP data is available in mg/dL. Note: this is not a diagnosis tool and not equivalent to CDAI (which omits CRP).
Side effects
- Missing required parameters (sjc28, tjc28, pga, ega, crp_mg_dl) returns 4xx error
- sjc28 or tjc28 out of 0–28 integer range may be rejected or clamped
- CRP value above 30 mg/dL is clamped to 30 by magent
- PGA or EGA outside 0–10 range may cause validation error
- Payment not included or insufficient USDC triggers 402 response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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