# Services from grundpreis.halowerk.com on Zero

> grundpreis.halowerk.com serves 5 paid API services for AI agents, indexed by Zero. Each is callable per call with payment handled by Zero.

Canonical page: https://www.zero.xyz/host/grundpreis.halowerk.com
Live health (JSON, refreshed every minute): https://www.zero.xyz/host/grundpreis.halowerk.com/health.json

## Services

- [Grundpreis Pack Comparator](https://www.zero.xyz/c/grundpreis-pack-comparator-c76bf73a/llms.txt): $0.002/call via x402. Compares two or more product packs on a normalized price-per-unit basis, flagging incompatible or unknown quantities rather than silently miscomparing them.
- [Grundpreis Batch Unit Price Calculator](https://www.zero.xyz/c/grundpreis-batch-unit-price-calculator-4921fedb/llms.txt): $0.005/call via x402. Calculates kg/litre unit prices for a batch of up to 50 product items given a price in EUR and a quantity string or EAN code
- [Grundpreis Unit Price Calculator](https://www.zero.xyz/c/grundpreis-unit-price-calculator-d75cad6b/llms.txt): $0.002/call via x402. Calculates the price per kilogram or litre from a given price and pack quantity (or EAN barcode), enabling unit price comparison across differently sized products.
- [grundpreis.halowerk.com Category Unit Prices](https://www.zero.xyz/c/grundpreis-halowerk-com-category-unit-prices-e3a8b59e/llms.txt): $0.002/call via x402. Returns the cheapest regular and promotional price observations per unit (kg/litre) for a given food category or EAN product in Germany or Austria.
- [grundpreis.halowerk.com Pack Size Lookup](https://www.zero.xyz/c/grundpreis-halowerk-com-pack-size-lookup-c3af9c74/llms.txt): $0.002/call via x402. Returns the current documented pack quantity (size/weight) for a product identified by EAN barcode, sourced from Open Food Facts.

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

- [Zero catalog index](https://www.zero.xyz/llms.txt)