List of Free Open Food Databases - Lifyzer/Lifyzer-Database GitHub Wiki
- https://world.openfoodfacts.org (EU market)
- https://fdc.nal.usda.gov/ (USA market)
- https://www.foodrepo.org (for the Swiss market)
- https://spoonacular.com/food-api Seems to rely on usda.gov database, and is a freemium API.
- https://product-open-data.com
- https://platform.fatsecret.com/api/Default.aspx?screen=prem (basic limited free plan).