Nutrition Facts API - Calories & Macros

Search 7,793 generic foods and get calories, protein, fat, carbohydrates, fiber, sugars, vitamins and minerals (36 nutrients) per 100 g or for any amount, with common portion sizes (cup, slice, piece). Calculate totals for a whole recipe or meal in one request.

Authentication & base URL

Subscribe through one of our marketplace listings; your marketplace API key and base URL are shown there. All endpoints return JSON over HTTPS, served from a global edge network (typically 20–150 ms).

Subscribe on RapidAPI

Endpoints

GET `/v1/nutrition/search`

Search foods

Parameter	In	Description	Example
`q` *	query	Food name in English	`chicken breast`
`category`	query	Optional category filter (see /categories)
`limit`	query	1-50	`10`

GET `/v1/nutrition/food/{fdcId}`

Food details

Parameter	In	Description	Example
`fdcId` *	path	Food id from search	`173944`
`grams`	query	Optional amount in grams to scale nutrients	`120`

GET `/v1/nutrition/calculate`

Recipe / meal totals

Parameter	In	Description	Example
`items` *	query	food:grams pairs separated by ; (or POST JSON {"items":[{"query":"banana","grams":120}]})	`eggs:100;oats:50;whole milk:200`

GET `/v1/nutrition/categories`

Food categories

Example

GET /v1/nutrition/search?q=chicken+breast&category=&limit=10

{
  "query": "chicken breast",
  "count": 10,
  "foods": [
    {
      "fdcId": 171477,
      "name": "Chicken, broilers or fryers, breast, meat only, cooked, roasted",
      "category": "Poultry Products",
      "per100g": {
        "energy_kcal": 165,
        "protein_g": 31,
        "fat_g": 3.57,
        "carbohydrates_g": 0
      }
    },
    {
      "fdcId": 174608,
      "name": "Chicken breast, roll, oven-roasted",
      "category": "Sausages and Luncheon Meats",
      "per100g": {
        "energy_kcal": 134,
        "protein_g": 14.6,
        "fat_g": 7.65,
        "carbohydrates_g": 1.79
      }
    },
    {
      "fdcId": 172963,
      "name": "Chicken breast, oven-roasted, fat-free, sliced",
      "category": "Sausages and Luncheon Meats",
      "per100g": {
        "energy_kcal": 79,
        "protein_g": 16.8,
        "fat_g": 0.39,
        "carbohydrates_g": 2.17
      }
    },
    {
      "fdcId": 171515,
      "name": "Chicken breast tenders, breaded, uncooked",
      "category": "Poultry Products",
      "per100g": {
        "energy_kcal": 263,
        "protein_g": 14.7,
        "fat_g": 15.8,
        "carbohydrates_g": 15
      }
    },
    {
      "fdcId": 172962,
      "name": "Chicken breast, fat-free, mesquite flavor, sliced",
      "category": "Sausages and Luncheon Meats",
      "per100g": {
        "energy_kcal": 80,
        "protein_g": 16.8,
        "fat_g": 0.39,
        "carbohydrates_g": 2.25
      }
    },
    {
      "fdcId": 171445,
      "name": "Chicken, broiler, rotisserie, BBQ, breast, meat only",
      "category": "Poultry Products",
      "per100g": {
        "energy_kcal": 144,
        "protein_g": 28,
        "fat_g": 3.57,
        "carbohydrates_g": 0
      }
    },
  …

Use cases

Diet and fitness apps, recipe sites (nutrition per serving), meal planners, calorie counters, food delivery menus, health chatbots and AI agents that need real nutrient numbers instead of guesses.

Why this API

Fast: global edge network, answers in milliseconds.
Official data: USDA FoodData Central, SR Legacy (public domain, CC0). No AI guesses.
36 nutrients incl. vitamins A, C, D, E, K, B-complex, minerals, caffeine and alcohol.
Smart search that prefers the common form of a food ("eggs" → whole raw egg, "milk" → whole milk).
Recipe calculator: send all ingredients, get per-item and total nutrition.
Fair pricing: Free plan 500 requests/month, Pro 25,000 for $4.99, Ultra 150,000 for $14.99.

Support

Questions or a feature you need? Open a thread in the Discussions tab.

Pricing

Free plan with 500 calls per month, then Pro (25,000 calls for $4.99/month) and Ultra (150,000 calls for $14.99/month). See all plans.