CalorieNinjas website screenshot

CalorieNinjas

CalorieNinjas provides an easy, free Nutrition Facts and Recipe API. Developers can retrieve nutrition information for over 100,000 foods and beverages using natural language queries, extract nutrition information from images of food-related text (menus, recipes, food journals), and search recipes matching search queries. All endpoints use a simple API key authentication model via the X-Api-Key header.

CalorieNinjas publishes 3 APIs on the APIs.io network: Imagetextnutrition API, Nutrition API, and Recipe API. Tagged areas include Beverages, Foods, Image Recognition, Nutrition, and Recipes.

CalorieNinjas’ developer surface includes authentication, developer portal, documentation, signup flow, pricing, and 6 more developer resources.

🌐 Visit website 📡 Source on GitHub
38.7/100 thin ▬ flat Agent 29/100 agent aware Full breakdown ↓
scored 2026-08-21 · rubric v0.12.0
AccessFreemiumSelf serve⚡ Free to try
3 APIs
BeveragesFoodsImage RecognitionNutritionRecipes

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-08-21 · rubric v0.12.0
Composite quality — 38.7/100 · thin
Contract Quality 13.3 / 25
Developer Ergonomics 6.2 / 20
Access Clarity 10.8 / 20
Operational Transparency 1.0 / 13
Contract Governance 0.0 / 12
Discoverability 7.4 / 10
Agent readiness — 29/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
Documented Reversibility 0 / 6
MCP Server 0 / 12
Machine-Readable Auth 10 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 7 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
A2A Agent Card 0 / 8
Dry-Run / Simulate Mode 0 / 4
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/calorie-ninjas: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 3

Individual APIs this provider publishes, each with its own machine-readable definition.

CalorieNinjas Imagetextnutrition API

The Imagetextnutrition API from CalorieNinjas — 1 operation(s) for imagetextnutrition.

CalorieNinjas Nutrition API

The Nutrition API from CalorieNinjas — 1 operation(s) for nutrition.

CalorieNinjas Recipe API

The Recipe API from CalorieNinjas — 1 operation(s) for recipe.

Open Collections 5

Open, tool-agnostic API collections (OpenAPI-derived and Bruno).

API Collection

OPEN COLLECTION

CalorieNinjas Imagetextnutrition API

OPEN COLLECTION

CalorieNinjas Imagetextnutrition Nutrition API

OPEN COLLECTION

CalorieNinjas Imagetextnutrition Recipe API

OPEN COLLECTION

CalorieNinjas

OPEN COLLECTION

Pricing Plans 1

Published pricing tiers and plan structures.

Calorie Ninjas Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Calorie Ninjas Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Calorie Ninjas Finops

FINOPS

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Calorie Ninjas Authentication

apiKey · 1 scheme

SECURITY

Calorie Ninjas Domain Security

TLSv1.3

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Calorie Ninjas Agentic Access

3 operations · 1 acting

3 operations · 1 acting

AGENTIC

Resources

Get Started 3

Portal, sign-up, and the first successful call

Portal
Portal
 Login
Login
 Signup
Signup

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 2

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess
 LlmsText
LlmsText

Access & Security 2

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity
 Authentication
Authentication

Commercial 3

Pricing, plans, and the legal terms of use

TermsOfService
TermsOfService
 PrivacyPolicy
PrivacyPolicy
 Pricing
Pricing

Source (apis.yml)

apis.yml Raw ↑ 
aid: calorie-ninjas
url: https://raw.githubusercontent.com/api-evangelist/calorie-ninjas/refs/heads/main/apis.yml
name: CalorieNinjas
tags:
- Beverages
- Foods
- Image Recognition
- Nutrition
- Recipes
type: Index
accessModel:
  pricing: freemium
  onboarding: self-serve
  trial: false
  try_now: true
  public: false
  label: Freemium · Self-serve signup
  confidence: high
  source:
  - plans
  - authentication
  generated: '2026-07-22'
  method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/calorie-ninjas.png
access: 3rd-Party
created: '2024-03-30'
modified: '2026-05-19'
position: Consumer
description: CalorieNinjas provides an easy, free Nutrition Facts and Recipe API. Developers can retrieve nutrition information
  for over 100,000 foods and beverages using natural language queries, extract nutrition information from images of food-related
  text (menus, recipes, food journals), and search recipes matching search queries. All endpoints use a simple API key authentication
  model via the X-Api-Key header.
apis:
- aid: calorie-ninjas:calorie-ninjas-imagetextnutrition-api
  name: CalorieNinjas Imagetextnutrition API
  description: The Imagetextnutrition API from CalorieNinjas — 1 operation(s) for imagetextnutrition.
  humanURL: https://calorieninjas.com/api
  baseURL: https://api.calorieninjas.com/v1
  tags:
  - Imagetextnutrition
  properties:
  - type: OpenAPI
    url: openapi/calorie-ninjas-imagetextnutrition-api-openapi.yml
  - type: Documentation
    url: https://calorieninjas.com/api
  - type: Review
    url: openapi/calorieninjas-openapi-review.yml
- aid: calorie-ninjas:calorie-ninjas-nutrition-api
  name: CalorieNinjas Nutrition API
  description: The Nutrition API from CalorieNinjas — 1 operation(s) for nutrition.
  humanURL: https://calorieninjas.com/api
  baseURL: https://api.calorieninjas.com/v1
  tags:
  - Nutrition
  properties:
  - type: OpenAPI
    url: openapi/calorie-ninjas-nutrition-api-openapi.yml
  - type: Documentation
    url: https://calorieninjas.com/api
  - type: Review
    url: openapi/calorieninjas-openapi-review.yml
- aid: calorie-ninjas:calorie-ninjas-recipe-api
  name: CalorieNinjas Recipe API
  description: The Recipe API from CalorieNinjas — 1 operation(s) for recipe.
  humanURL: https://calorieninjas.com/api
  baseURL: https://api.calorieninjas.com/v1
  tags:
  - Recipe
  properties:
  - type: OpenAPI
    url: openapi/calorie-ninjas-recipe-api-openapi.yml
  - type: Documentation
    url: https://calorieninjas.com/api
  - type: Review
    url: openapi/calorieninjas-openapi-review.yml
common:
- type: AgenticAccess
  url: agentic-access/calorie-ninjas-agentic-access.yml
- type: DomainSecurity
  url: security/calorie-ninjas-domain-security.yml
- type: Authentication
  url: authentication/calorie-ninjas-authentication.yml
- type: Portal
  url: https://calorieninjas.com/
- type: Documentation
  url: https://calorieninjas.com/api
- type: Login
  url: https://calorieninjas.com/signin
- type: Signup
  url: https://calorieninjas.com/register
- type: TermsOfService
  url: https://calorieninjas.com/tos
- type: PrivacyPolicy
  url: https://calorieninjas.com/privacy
- type: Pricing
  url: https://calorieninjas.com/pricing
- type: LlmsText
  url: https://calorieninjas.com/llms.txt
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
specificationVersion: '0.23'

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