{"uid":"cap_lnOp_AW6UQouil5rLCVwN","slug":"vacs-index-1-0-calculator-tate-2013-2f920359","name":"VACS Index 1.0 Calculator (Tate 2013)","description":"Tate 2013 VACS Index 1.0 (not VACS 2.0): age, CD4, HIV-1 RNA, hemoglobin g/dL, caller-assigned FIB-4 and eGFR, and hepatitis C. Points 0-164. No published named mortality bands. magent does not compute FIB-4 or MDRD/CKD-EPI and does not order ART.","url":"https://api.magentlab.com/api/calc/vacs_1","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":["age","cd4_cells_mm3","hiv_rna_copies_ml","hemoglobin_g_dl","fib4","egfr_ml_min_1_73m2","hepatitis_c"],"properties":{"age":{"type":"integer","description":"Age in years (integer 18-120). Tate 2013 VACS Index: <50 scores 0; 50-64 scores 12; ≥65 scores 27."},"fib4":{"type":"number","description":"Caller-assigned FIB-4 (0.1-20). Tate 2013: <1.45 scores 0; 1.45-3.25 scores 6; >3.25 scores 25. magent does not recompute FIB-4."},"hepatitis_c":{"type":"boolean","description":"Caller-assigned hepatitis C co-infection (Tate 2013). true scores 5. magent does not diagnose hepatitis C."},"cd4_cells_mm3":{"type":"integer","description":"CD4 count in cells/mm³ (integer 1-2000). Tate 2013: ≥500 scores 0; 350-499 scores 6; 200-349 scores 6; 100-199 scores 10; 50-99 scores 28; <50 scores 29. magent does not assay CD4."},"hemoglobin_g_dl":{"type":"number","description":"Hemoglobin in g/dL (3-22). Tate 2013: ≥14 scores 0; 12-13.9 scores 10; 10-11.9 scores 22; <10 scores 38. magent does not assay hemoglobin."},"hiv_rna_copies_ml":{"type":"number","description":"HIV-1 RNA in copies/mL (0-10000000). Tate 2013: <500 scores 0; 500-99999 scores 7; ≥100000 scores 14. magent does not assay viral load."},"egfr_ml_min_1_73m2":{"type":"number","description":"Caller-assigned eGFR in mL/min/1.73m² (5-200). Tate 2013: ≥60 scores 0; 45-59.9 scores 6; 30-44.9 scores 8; <30 scores 26. magent does not compute MDRD or CKD-EPI."}}}},"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_Ww2BSNkSHEwdBKT5FMpkV","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 Veterans Aging Cohort Study (VACS) Index 1.0 score (0–164) for HIV-positive patients using age, CD4, HIV-1 RNA, hemoglobin, FIB-4, eGFR, and hepatitis C co-infection status.","exampleAgentPrompt":"Calculate the VACS Index 1.0 score for a 58-year-old HIV-positive patient with a CD4 count of 320 cells/mm³, HIV-1 RNA of 2500 copies/mL, hemoglobin of 11.5 g/dL, FIB-4 of 1.8, eGFR of 52, and hepatitis C co-infection.","exampleUseCases":[{"title":"HIV clinic mortality risk stratification","prompt":"I need a VACS Index 1.0 score for a 62-year-old HIV patient: CD4 is 180 cells/mm³, viral load is 95000 copies/mL, hemoglobin 13.2 g/dL, FIB-4 score 2.1, eGFR 48, no hepatitis C co-infection."},{"title":"Longitudinal treatment response tracking","prompt":"Can you compute the VACS 1.0 score for my patient who is 51 years old, CD4 of 450, HIV RNA under 500 copies/mL, hemoglobin 14.5 g/dL, FIB-4 of 1.2, eGFR 65, hepatitis C negative — this is their follow-up score after starting ART."},{"title":"HIV research cohort risk scoring","prompt":"For a study cohort member: age 70, CD4 count 45 cells/mm³, HIV-1 RNA 250000 copies/mL, hemoglobin 9.8 g/dL, FIB-4 of 4.1, eGFR 28, hepatitis C positive — give me the Tate 2013 VACS Index 1.0 total score."}],"resultDescription":"Returns an integer VACS Index 1.0 total score between 0 and 164, derived by summing points from each of the seven clinical inputs per the Tate 2013 published scoring bands. Higher scores indicate greater mortality risk. The endpoint does not return named risk bands, percentile ranks, or treatment recommendations.","failureModes":["Missing required parameters (age, CD4, HIV-1 RNA, hemoglobin, FIB-4, eGFR, or hepatitis_c) returns a validation error","Out-of-range values (e.g. age <18, CD4 >2000, hemoglobin >22) may be rejected or produce unexpected results","FIB-4 or eGFR values not pre-computed by caller will produce errors since the endpoint does not derive them","Payment failure (x402) if USDC balance is insufficient","Boolean hepatitis_c passed as string instead of true/false may cause a schema error"],"whenToPreferThis":"Use this endpoint when you need the original Tate 2013 VACS Index 1.0 (not VACS 2.0) for HIV-positive adult patients and already have pre-computed FIB-4 and eGFR values available. Prefer this over manual lookup tables when integrating VACS scoring into automated clinical pipelines or research workflows. Do not use if you need the updated VACS Index 2.0, or if you need the system to compute FIB-4, MDRD, or CKD-EPI from raw labs — those must be supplied by the caller.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T13:01:02.919Z","isFirstParty":false}