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OnchainExpat Nutrition Search API
x402
OnchainExpat Nutrition Search API is a paid API for AI agents from x402.onchainexpat.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-13).
Search for food items and retrieve nutritional information using a pay-per-request x402 API
Price / call$0.01
Success—
StatusUnknown
How this service works
Pay-per-request AI, crypto, proxy, and utility APIs using x402 protocol
Output
Returns structured JSON with nutritional data for the matched food item(s), including macronutrients (calories, protein, fat, carbohydrates) and potentially other dietary metrics like fiber, sugar, and micronutrients.
Example use cases
Example prompt
“Search for the nutritional information for 'grilled salmon' — I need the calories, protein, fat, and carb content.”
Technical details
Endpoint
POSThttps://x402.onchainexpat.com/api/x402-tools/nutrition/searchWhen to prefer
Use this endpoint when you need quick, pay-per-request nutrition lookups without subscribing to a full nutrition API service. Ideal for agents that need occasional food data lookups and want to pay micro-amounts per call using USDC on-chain rather than managing a subscription.
Side effects
- Food item not found in database — returns empty or null results
- Ambiguous query matches multiple foods — returns list or best guess
- Payment failure via x402 — returns 402 Payment Required if USDC payment not fulfilled
- Invalid or missing query parameter — returns 400 Bad Request
- Rate limit or server error — returns 500 or 503
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| limit | integer | Max results (default 10, max 25) |
| queryrequired | string | Food name. Alias: 'food'. E.g. 'apple', 'chicken breast' |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| query | string | |
| cached | boolean | |
| results | array |
Tags
x402
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