One REST API for drug search, supplement lookup, and interaction checking. Instead of integrating three government databases (openFDA, RxNorm, NIH ODS), you make one call for clean JSON. Covers drug-drug interactions (FDA labels plus a curated major set), 250+ drug-supplement pairs from NIH, and supplement profiles. A unified endpoint auto-classifies each item and checks all pairs. All data from free government sources. Nothing generated or inferred. Free tier: 250 calls/mo; paid from $29/mo.