{"sample":true,"note":"Static example of what /calc/bmi returns; not live data and not charged. Call without sample=1 and pay $0.01 with any x402 client for a live result.","tool":"/calc/bmi","price":"$0.01","example":{"bmi":22.9,"category":"normal weight","normalWeightRange":{"min":56.7,"max":76.3,"unit":"kg"},"note":"WHO adult categories; not a diagnosis."}}