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grundpreis.halowerk.com Pack Size Lookup
x402
grundpreis.halowerk.com Pack Size Lookup is a paid API for AI agents from grundpreis.halowerk.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-21).
Returns the current documented pack quantity (size/weight) for a product identified by EAN barcode, sourced from Open Food Facts.
Price / call$0.002
Success—
StatusUnknown
How this service works
Current documented pack quantity for an EAN string from Open Food Facts. Example: ean 4008400401621. Snapshot and data gaps are explicit. This is neither a historical shrinkflation measure nor a retail price.
Output
Returns the current documented pack size (quantity and unit, e.g. 400 g or 1 L) for the given EAN as recorded in Open Food Facts, along with a snapshot indicator and any explicit data gaps where the information is missing or uncertain.
Example use cases
Unit price calculation for grocery app
“I have a product with EAN 4008400401621 and it costs EUR 1.79 — can you look up its pack size so I can work out the price per kilogram?”
Verify pack size before shrinkflation check
“I'm researching whether a cereal brand has changed its pack size. Can you fetch the currently documented pack quantity for EAN 5010029006141 from Open Food Facts so I have a baseline snapshot?”
Enrich product catalog with weights
“I need to fill in missing weight data for a product in my catalog. Can you look up the pack size for EAN 8000500037560 so I can record what the Open Food Facts database says?”
Technical details
Endpoint
POSThttps://grundpreis.halowerk.com/v1/pack-size?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, structured lookup of a product's pack size by EAN barcode from Open Food Facts, especially to feed into unit price or price-per-kg calculations. It explicitly surfaces data gaps, making it reliable for downstream computations. Prefer this over scraping Open Food Facts directly when you need a clean, paid, low-latency API response with explicit gap handling. Not suitable for tracking shrinkflation over time or retrieving retail prices.
Side effects
- EAN not found in Open Food Facts — returns explicit data gap or empty result
- Invalid EAN format (too short/long) — schema validation error
- EAN found but pack size field unpopulated in source data — explicit gap returned
- Service unavailable — HTTP error response
- Stale snapshot — data may not reflect most recent product reformulation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| ean | string |
Tags
x402
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