# Food Barcode Facts

Packaged food lookup by barcode: nutrition, allergens, diet fit, additives, comparison, daily values.

## How to pay

Machine-payable over x402. USDC on: Base (eip155:8453), Solana (solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp), Polygon (eip155:137), Arbitrum One (eip155:42161).
No accounts. No API keys. No signup. The paying wallet is the account.

## Machine-readable

- OpenAPI: https://food-barcode.x402tookit.com/openapi.json
- x402 manifest: https://food-barcode.x402tookit.com/.well-known/x402
- Catalog (free): https://food-barcode.x402tookit.com/catalog
- Health (free): https://food-barcode.x402tookit.com/health
- Uptime (free): https://food-barcode.x402tookit.com/uptime

## Endpoints (7)

### GET /additive-info — $0.02
Name and function of a common food additive by E-number (E102, E330, E621 and about 90 more); a reference, not a safety rating.
Params: code: string
Example: https://food-barcode.x402tookit.com/additive-info?code=E330

### GET /food-additives — $0.02
Additives (E-numbers) declared for a food barcode, with each additive's name and function and an ultra-processing flag.
Params: barcode: string
Example: https://food-barcode.x402tookit.com/food-additives?barcode=3017620422003

### GET /food-allergens — $0.02
Allergens and traces declared for a barcode, checked against allergens you avoid; never claims a product is safe.
Params: barcode: string, avoid?: string
Example: https://food-barcode.x402tookit.com/food-allergens?barcode=3017620422003&avoid=milk%2Cgluten

### GET /food-compare — $0.05
Compare two packaged foods by barcode: Nutri-Score, NOVA, and per-100 g energy, sugars, saturated fat, salt, fibre and protein.
Params: barcode: string, other: string
Example: https://food-barcode.x402tookit.com/food-compare?barcode=3017620422003&other=5449000000996

### GET /food-diet-check — $0.02
Does a packaged food fit a vegan, vegetarian, palm-oil-free or gluten-free diet, per its ingredient analysis and labels.
Params: barcode: string, diet: string
Example: https://food-barcode.x402tookit.com/food-diet-check?barcode=3017620422003&diet=vegan

### GET /food-product — $0.02
Packaged food profile by barcode: name, brand, Nutri-Score, NOVA processing group, nutrition per 100 g and data quality.
Params: barcode: string
Example: https://food-barcode.x402tookit.com/food-product?barcode=3017620422003

### GET /nutrition-calc — $0.02
Scale label nutrition from per 100 g to a serving, with FDA percent daily values and a check that the calories match the macros.
Params: serving_g: number, kcal?: number, fat?: number, sat_fat?: number, carbs?: number, sugars?: number, fiber?: number, protein?: number, sodium_mg?: number
Example: https://food-barcode.x402tookit.com/nutrition-calc?serving_g=30&kcal=539&fat=30.9&sat_fat=10.6&carbs=57.5&sugars=56.3&protein=6.3&sodium_mg=41

## Terms

Product data comes from Open Food Facts, a community-edited database under the Open Database Licence, and local computation, provided as is. Entries can be incomplete, outdated or wrong, and manufacturers change recipes. Never rely on this for allergy, medical or dietary safety decisions: always read the physical package label. Not medical or nutritional advice.