{"uid":"cap_n_JWHm7zhZ5SBsR_tg6QW","slug":"magent-sdai-calculator-8d5078ff","name":"magent SDAI Calculator","description":"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.","url":"https://api.magentlab.com/api/calc/sdai","method":"GET","headers":{},"bodySchema":{"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":["sjc28","tjc28","pga","ega","crp_mg_dl"],"properties":{"ega":{"type":"number","description":"Caller-assigned evaluator global assessment on a 0-10 cm VAS (Aletaha 2005). Number 0-10. magent does not examine the patient."},"pga":{"type":"number","description":"Caller-assigned patient global assessment on a 0-10 cm VAS (Aletaha 2005). Number 0-10. magent does not examine the patient."},"sjc28":{"type":"integer","description":"Caller-assigned swollen joint count on the 28-joint set (Aletaha 2005). Integer 0-28. magent does not count joints."},"tjc28":{"type":"integer","description":"Caller-assigned tender joint count on the 28-joint set (Aletaha 2005). Integer 0-28. magent does not count joints."},"crp_mg_dl":{"type":"number","description":"Caller-assigned C-reactive protein in mg/dL (Aletaha 2005; not mg/L). Number 0-30 is a magent clamp. magent does not assay CRP."}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_1HbkSgvP1tM3yScTCXJPR","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"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.","exampleAgentPrompt":"Calculate the SDAI score for a patient with 4 swollen joints, 7 tender joints, a patient global of 5.5, an evaluator global of 4.0, and a CRP of 1.2 mg/dL — and tell me what disease activity state that puts them in.","exampleUseCases":[{"title":"Pre-visit disease activity check","prompt":"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?"},{"title":"Treatment response monitoring","prompt":"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."},{"title":"Clinical trial eligibility screening","prompt":"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?"}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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).","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T18:54:01.921Z","isFirstParty":false}