Compares up to 20 grocery packs by unit price
Compares up to 20 grocery packs by unit price. Each pack has a price in EUR and either a quantity text ("750 g", "2 x 1 l") or an EAN whose pack size comes from Open Food Facts. Returns each pack with normalised quantity and price per kg or litre, sorted cheapest first, the saving of the cheapest against each other pack in percent, and flags packs that could not be compared (mixed kg and l, or quantity unknown). No estimation.
Answeringour last check, 2026-10-20
1 of 1checks answered this week
894 msmedian answer time
$0.002listed price per call
$0.002price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
POST https://grundpreis.halowerk.com/v1/pack-compare
| Category | Market data |
|---|---|
| Provider host | grundpreis.halowerk.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-20 | valid payment request | 402 | $0.002 | 894 ms |
Example input (from the provider)
{
"body": {
"packs": [
{
"label": "small",
"price_eur": 1.29,
"quantity": "500 g"
},
{
"label": "family",
"price_eur": 3.49,
"quantity": "1,5 kg"
}
]
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"packs": {
"items": {
"additionalProperties": false,
"properties": {
"ean": {
"maxLength": 14,
"minLength": 8,
"type": "string"
},
"label": {
"maxLength": 80,
"type": "string"
},
"price_eur": {
"exclusiveMinimum": 0,
"maximum": 100000,
"type": "number"
},
"quantity": {
"maxLength": 40,
"type": "string"
}
},
"required": [
"price_eur"
],
"type": "object"
},
"maxItems": 20,
"minItems": 2,
"type": "array"
}
},
"required": [
"packs"
],
"type": "object"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method",
"bodyType",
"body"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}