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USDA FoodData Central Nutrition Search
x402
USDA FoodData Central Nutrition Search is a paid API for AI agents from x402-data-bazaar.vercel.app, paid per call via x402, $0.008/call, status down (last checked 2026-09-13).
Searches USDA FoodData Central for nutrition facts (calories, protein, fat, carbs, fiber, sugar, sodium, cholesterol) for any food query
Price / call$0.008
Success—
StatusDown
How this service works
Search USDA FoodData Central for nutrition data -- calories, protein, fat, carbs, fiber, sugar, sodium, cholesterol per food. Query: ?query=chicken breast&limit=5. If query is omitted, defaults to `chicken breast`.
Output
Returns a list of matching foods from USDA FoodData Central, each with per-food nutrient values including calories (with unit), and a count of total results matched, plus the echoed query string and a success flag.
Example use cases
Example prompt
“Look up nutrition facts for salmon from the USDA food database — calories, protein, fat, and carbs — and show me the top 3 results.”
Technical details
Endpoint
GEThttps://x402-data-bazaar.vercel.app/api/nutrition/searchWhen to prefer
Use this endpoint when you need structured, government-sourced nutrition data for a specific food item — especially calories, macros, fiber, sugar, sodium, or cholesterol. Prefer this over generic web search when you need machine-readable nutritional values sourced from the USDA. Ideal for diet tracking, meal planning, recipe analysis, or health-focused applications.
Side effects
- Empty or missing query defaults to 'chicken breast' rather than returning an error
- Limit parameter ignored or clamped if out of range
- Food not found in USDA database returns empty foods array
- Invalid limit string may cause unexpected behavior
- Network timeout or Vercel cold-start delay on first request
- Payment failure (x402) returns 402 before nutrition data is served
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | string | Maximum results to return |
| query | string | Food search phrase |
Output
Schema · Response
{
"data": {
"count": 2,
"foods": [
{
"calories": {
"unit": "KCAL",
"value": 144
},
"description": "Chicken breast, rotisserie, skin not eaten"
},
{
"calories": {
"unit": "kJ",
"value": 1100
},
"description": "Chicken breast tenders, breaded, uncooked"
}
],
"query": "chicken breast"
},
"source": "USDA FoodData Central",
"success": true
}Tags
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