{"uid":"cap_ydL6TDJrUhwxoeCpdM1sR","slug":"grundpreis-halowerk-com-pack-size-lookup-c3af9c74","name":"grundpreis.halowerk.com Pack Size Lookup","description":"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.","url":"https://grundpreis.halowerk.com/v1/pack-size?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"ean":{"type":"string","maxLength":14,"minLength":8}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_h2HhxcWUAQ6a_GRv8HAa3","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns the current documented pack quantity (size/weight) for a product identified by EAN barcode, sourced from Open Food Facts.","exampleAgentPrompt":"What is the current documented pack size for the product with EAN 4008400401621? I need to know the quantity or weight as listed in Open Food Facts so I can calculate the unit price.","exampleUseCases":[{"title":"Unit price calculation for grocery app","prompt":"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?"},{"title":"Verify pack size before shrinkflation check","prompt":"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?"},{"title":"Enrich product catalog with weights","prompt":"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?"}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:19:45.161Z","isFirstParty":false,"canonicalSlug":"grundpreis-halowerk-com-pack-size-lookup-c3af9c74"}