Yes, USDA foundation foods is very good for estimating calories/nutrients by ingredients, perfect for getting caloric content and nutrients of a recipe. Nutrit

Yes, USDA foundation foods is very good for estimating calories/nutrients by ingredients, perfect for getting caloric content and nutrients of a recipe. Nutritionix is very good for packaged foods, they got both an API and an app which can accept barcode scans. I’ve also played around with plain google searches “calories <food> <x> g” works great for many simple items if all you care about is calories.