{"uid":"cap_3koJNTYXWWWcQVQSFgdbV","slug":"sulf-fast-sulfa-allergy-risk-score-calculator-60feb983","name":"SULF-FAST Sulfa Allergy Risk Score Calculator","description":"Waldron 2023 SULF-FAST for patients who already report a TMP-SMX (sulfa antibiotic) allergy. Adapted PEN-FAST flags, not PEN-FAST itself. Three caller-assigned flags: allergy event 5 or fewer years ago (2), anaphylaxis/angioedema or potential SCAR as one criterion (2), treatment required (1). Max 5. Risk: low if score < 3, elevated if ≥ 3. low_risk_for_testing iff score < 3. Not an allergy diagnosis or delabeling order. magent does not take an allergy history.","url":"https://api.magentlab.com/api/calc/sulf_fast","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":["five_or_fewer_years_ago","anaphylaxis_angioedema_or_scar","treatment_required"],"properties":{"treatment_required":{"type":"boolean","description":"Treatment required for the allergy episode as assigned by the caller (Waldron 2023). true scores 1. magent does not take an allergy history."},"five_or_fewer_years_ago":{"type":"boolean","description":"Allergy event 5 or fewer years ago as assigned by the caller (Waldron 2023). true scores 2. magent does not take an allergy history."},"anaphylaxis_angioedema_or_scar":{"type":"boolean","description":"Anaphylaxis/angioedema or potential SCAR as one 2-point criterion (Waldron 2023). true scores 2; do not add both phenotypes separately. magent does not take an allergy history."}}}},"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_972KcS3JoMHgPKqx2UZWT","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 Waldron 2023 SULF-FAST score to stratify risk in patients reporting a TMP-SMX (sulfa) antibiotic allergy, returning a numeric score and low/elevated risk classification.","exampleAgentPrompt":"My patient reports a sulfa allergy from 3 years ago where they had anaphylaxis and required treatment — can you calculate their SULF-FAST score using the Waldron 2023 criteria and tell me if they're low or elevated risk?","exampleUseCases":[{"title":"Pre-antibiotic allergy workup risk triage","prompt":"I have a patient with a documented TMP-SMX allergy — the reaction happened 2 years ago, they had angioedema, and they needed treatment. What's their SULF-FAST score and are they low risk for allergy testing?"},{"title":"Low-risk sulfa allergy confirmation for prescribing","prompt":"My patient says they had a sulfa allergy reaction more than 5 years ago, no anaphylaxis or SCAR, and no treatment was needed. Can you run the Waldron 2023 SULF-FAST calculation so I can document their risk level?"},{"title":"Elevated risk flag before formulary substitution","prompt":"Before I consider an alternative antibiotic, I need to know if this patient's sulfa allergy is elevated risk — the event was 4 years ago, they didn't have anaphylaxis or SCAR, but they did require treatment. Please calculate the SULF-FAST score."}],"resultDescription":"Returns a SULF-FAST integer score (0–5), a risk category (low if score < 3, elevated if score ≥ 3), and a low_risk_for_testing boolean. This is a clinical decision-support score only — not an allergy diagnosis or a delabeling order.","failureModes":["Missing required query parameters (five_or_fewer_years_ago, anaphylaxis_angioedema_or_scar, treatment_required) returns a 400 validation error","Non-boolean values for flag parameters cause schema validation failure","Payment not included or insufficient (x402 protocol) returns 402 Payment Required","Attempting to use this for penicillin allergy or non-sulfa allergy contexts produces a misapplied score — caller must ensure the patient has a reported TMP-SMX allergy"],"whenToPreferThis":"Use this endpoint when you have a patient with a documented or reported TMP-SMX (sulfa antibiotic) allergy and need a structured, validated risk score based on the Waldron 2023 SULF-FAST criteria. Prefer this over general allergy tools when you specifically need sulfa-adapted PEN-FAST-style scoring. Do not use if the allergy involves penicillin or another drug class — use the appropriate PEN-FAST or drug-specific endpoint instead.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T18:58:52.375Z","isFirstParty":false}