Developer's nutrition API gets 54 free signups but no paid upgrades; two bugs found

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A developer published a food and nutrition API on RapidAPI offering calorie and macronutrient data, barcode lookup, allergen detection, and diet tools. The service draws on USDA FoodData Central and Open Food Facts and attracted 54 free-plan signups without any paid upgrades. Investigating the lack of conversions, the developer discovered that single-food lookups returned zero calories because of a mismatch in USDA's nutrient data format. A second problem was that the server did not verify that requests came through RapidAPI, so paid plans could be bypassed. The developer has since fixed both issues, requiring a secret header on every request, and corrected a listing that described an endpoint that did not exist. The developer is now seeking feedback on pricing and on features that would make the API competitive with established alternatives like Edamam and Nutritionix.

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