Nutritionix Item API

openapi: 3.0.3
info:
  title: Nutritionix Track API v2 Brands Item API
  version: '2.0'
  description: The Nutritionix Track API converts natural-language food and exercise descriptions into detailed nutrient and calorie analysis, and provides search and lookup access to the world's largest verified nutrition database, including USDA-linked common foods and over a million branded and restaurant menu items.
  contact:
    name: Nutritionix Developer Support
    url: https://developer.nutritionix.com/
  x-generated-from: documentation
  x-last-validated: '2026-06-03'
servers:
- url: https://trackapi.nutritionix.com/v2
  description: Nutritionix Track API v2 production server
security:
- AppId: []
  AppKey: []
tags:
- name: Item
  description: Look up detailed nutrition for branded and restaurant menu items.
paths:
  /search/item:
    get:
      operationId: searchItem
      summary: Nutritionix Search Item
      description: Retrieve full nutrition detail for a branded or restaurant menu item by its Nutritionix item identifier or UPC barcode.
      tags:
      - Item
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
      parameters:
      - name: nix_item_id
        in: query
        required: false
        description: The Nutritionix item identifier for a branded or restaurant item.
        schema:
          type: string
        example: 513fc9e73fe3ffd40300109f
      - name: upc
        in: query
        required: false
        description: The UPC barcode of a branded grocery item.
        schema:
          type: string
      - name: claims
        in: query
        required: false
        description: Whether to include marketing/regulatory claims in the response.
        schema:
          type: boolean
          default: false
      - name: allergens
        in: query
        required: false
        description: Whether to include allergen information in the response.
        schema:
          type: boolean
          default: false
      responses:
        '200':
          description: Branded item nutrition detail.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/FoodsResponse'
              examples:
                SearchItem200Example:
                  summary: Default searchItem 200 response
                  x-microcks-default: true
                  value:
                    foods:
                    - food_name: Big Mac
                      brand_name: McDonald's
                      serving_qty: 1
                      serving_unit: burger
                      serving_weight_grams: 219
                      nf_calories: 540
                      nf_total_fat: 28
                      nf_saturated_fat: 10
                      nf_cholesterol: 80
                      nf_sodium: 970
                      nf_total_carbohydrate: 47
                      nf_dietary_fiber: 3
                      nf_sugars: 9
                      nf_protein: 25
                      nf_potassium: 1
                      nf_p: 1
                      full_nutrients:
                      - attr_id: 203
                        value: 25
                      nix_brand_name: McDonald's
                      nix_brand_id: 513fbc1283aa2dc80c000053
                      nix_item_name: Big Mac
                      nix_item_id: 513fc9e73fe3ffd40300109f
                      metadata: {}
                      source: 8
                      ndb_no: 1
                      tags: {}
                      alt_measures:
                      - serving_weight: 219
                        measure: burger
                        seq: 1
                        qty: 1
                      photo:
                        thumb: https://nix-tag-images.s3.amazonaws.com/402_thumb.jpg
                        highres: highres
                        is_user_uploaded: false
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /item:
    get:
      operationId: getItem
      summary: Nutritionix Get Item
      description: Retrieve a single item by its item identifier, resource identifier, or UPC. This is the legacy item-lookup endpoint; new integrations should prefer /search/item.
      tags:
      - Item
      deprecated: true
      x-microcks-operation:
        delay: 0
        dispatcher: FALLBACK
      parameters:
      - name: id
        in: query
        required: false
        description: The item identifier or resource identifier to look up.
        schema:
          type: string
      - name: upc
        in: query
        required: false
        description: The UPC barcode of a branded grocery item.
        schema:
          type: string
      - name: nix_item_id
        in: query
        required: false
        description: The Nutritionix item identifier.
        schema:
          type: string
      responses:
        '200':
          description: Item nutrition detail.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/FoodsResponse'
              examples:
                GetItem200Example:
                  summary: Default getItem 200 response
                  x-microcks-default: true
                  value:
                    foods:
                    - food_name: Big Mac
                      brand_name: McDonald's
                      serving_qty: 1
                      serving_unit: burger
                      serving_weight_grams: 219
                      nf_calories: 540
                      nf_total_fat: 28
                      nf_saturated_fat: 10
                      nf_cholesterol: 80
                      nf_sodium: 970
                      nf_total_carbohydrate: 47
                      nf_dietary_fiber: 3
                      nf_sugars: 9
                      nf_protein: 25
                      nf_potassium: 1
                      nf_p: 1
                      full_nutrients:
                      - attr_id: 203
                        value: 25
                      nix_brand_name: McDonald's
                      nix_brand_id: 513fbc1283aa2dc80c000053
                      nix_item_name: Big Mac
                      nix_item_id: 513fc9e73fe3ffd40300109f
                      metadata: {}
                      source: 8
                      ndb_no: 1
                      tags: {}
                      alt_measures:
                      - serving_weight: 219
                        measure: burger
                        seq: 1
                        qty: 1
                      photo:
                        thumb: https://nix-tag-images.s3.amazonaws.com/402_thumb.jpg
                        highres: highres
                        is_user_uploaded: false
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  schemas:
    Food:
      type: object
      description: A fully detailed food object with complete nutrient information.
      properties:
        food_name:
          type: string
          example: Big Mac
        brand_name:
          type: string
          nullable: true
          example: McDonald's
        serving_qty:
          type: number
          example: 1
        serving_unit:
          type: string
          example: burger
        serving_weight_grams:
          type: number
          nullable: true
          example: 219
        nf_calories:
          type: number
          example: 540
        nf_total_fat:
          type: number
          example: 28
        nf_saturated_fat:
          type: number
          example: 10
        nf_cholesterol:
          type: number
          example: 80
        nf_sodium:
          type: number
          example: 970
        nf_total_carbohydrate:
          type: number
          example: 47
        nf_dietary_fiber:
          type: number
          nullable: true
          example: 3
        nf_sugars:
          type: number
          nullable: true
          example: 9
        nf_protein:
          type: number
          example: 25
        nf_potassium:
          type: number
          nullable: true
        nf_p:
          type: number
          nullable: true
        full_nutrients:
          type: array
          description: Complete list of nutrient values keyed by USDA attribute id.
          items:
            $ref: '#/components/schemas/FullNutrient'
        nix_brand_name:
          type: string
          nullable: true
          example: McDonald's
        nix_brand_id:
          type: string
          nullable: true
          example: 513fbc1283aa2dc80c000053
        nix_item_name:
          type: string
          nullable: true
          example: Big Mac
        nix_item_id:
          type: string
          nullable: true
          example: 513fc9e73fe3ffd40300109f
        metadata:
          type: object
          additionalProperties: true
        source:
          type: integer
          description: Internal source identifier for the food record.
          example: 8
        ndb_no:
          type: integer
          nullable: true
          description: USDA National Nutrient Database number for common foods.
        tags:
          type: object
          nullable: true
          additionalProperties: true
        alt_measures:
          type: array
          nullable: true
          description: Alternative serving measures for the food.
          items:
            $ref: '#/components/schemas/AltMeasure'
        photo:
          $ref: '#/components/schemas/Photo'
    FoodsResponse:
      type: object
      description: A response that wraps one or more fully detailed food objects.
      properties:
        foods:
          type: array
          items:
            $ref: '#/components/schemas/Food'
    Error:
      type: object
      description: Standard error response.
      properties:
        message:
          type: string
          description: Human-readable error message.
        id:
          type: string
          description: Internal error identifier.
    Photo:
      type: object
      description: Image URLs associated with a food or exercise.
      properties:
        thumb:
          type: string
          format: uri
          nullable: true
          example: https://nix-tag-images.s3.amazonaws.com/402_thumb.jpg
        highres:
          type: string
          format: uri
          nullable: true
        is_user_uploaded:
          type: boolean
          default: false
    FullNutrient:
      type: object
      description: A nutrient value identified by its USDA attribute id.
      properties:
        attr_id:
          type: integer
          description: USDA NUTR_DEF attribute identifier.
          example: 203
        value:
          type: number
          description: Nutrient value for the serving.
          example: 25
    AltMeasure:
      type: object
      description: An alternative serving measure for a food.
      properties:
        serving_weight:
          type: number
          example: 219
        measure:
          type: string
          example: burger
        seq:
          type: integer
          nullable: true
        qty:
          type: number
          example: 1
  responses:
    Unauthorized:
      description: Missing or invalid x-app-id / x-app-key credentials.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    NotFound:
      description: The requested resource could not be found.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    AppId:
      type: apiKey
      in: header
      name: x-app-id
      description: Your Nutritionix application identifier.
    AppKey:
      type: apiKey
      in: header
      name: x-app-key
      description: Your Nutritionix application key.