# Open Food Facts Products by Additive Tag

> Open Food Facts Products by Additive Tag is a paid API for AI agents from clonecho.builda.company, paid per call via x402, $0.02/call, status unknown (last checked 2026-09-13).

Searches Open Food Facts for food products that contain a specific food additive (e.g. E330 citric acid), returning matching product records as JSON.

## Facts

- Endpoint: POST https://clonecho.builda.company/x402/s/off-products-by-additive
- Price: $0.02/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/open-food-facts-products-by-additive-tag-aa8ae40f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zsOOe1-aZrcPYzAxhaT80

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability open-food-facts-products-by-additive-tag-aa8ae40f -d '<json body>'
```

Example prompt: Can you find all food products on Open Food Facts that contain the additive E330 (citric acid)?

## When to prefer this

Use this endpoint when you need to look up food products by a specific additive E-number or tag via the Open Food Facts database. Prefer this over general product search endpoints when the user's primary filter is a food additive rather than product name, category, or brand.

## Known failure modes

- Unknown or invalid additive tag returns empty results
- Missing ?q= parameter may return an error or empty response
- Additive tag formatted without 'e' prefix may not match (e.g. '330' vs 'e330')
- Open Food Facts upstream unavailability causing timeout or error
- Very common additives may return large result sets

## How this service works

Search Open Food Facts for food products matching the additive tag (e.g. e330) {q}, returning product records. Query: ?q= Returns JSON.

## Output

A JSON array of food product records from Open Food Facts that are tagged with the specified additive code, including product names and associated metadata for each matching item.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/open-food-facts-products-by-additive-tag-aa8ae40f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from clonecho.builda.company](https://www.zero.xyz/host/clonecho.builda.company/llms.txt)