For one Open Food Facts main category (e.g
For one Open Food Facts main category (e.g. en:butters, en:pastas, en:milks; an EAN can be given instead to use its category), collects the latest observed Open Prices price of every product in that category in the last 365 days in Germany or Austria and returns the unit-price distribution per kg or litre (count, minimum, first quartile, median, third quartile, maximum) and the ten cheapest products with pack size, price, date and chain. Only products with a known pack size are counted.
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/category-unit-prices
| Category | Commerce and shopping |
|---|---|
| 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 | $0.002 | 893 ms |
Example input (from the provider)
{
"body": {
"category": "en:butters",
"country": "DE"
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"category": {
"description": "Open Food Facts category tag, e.g. en:butters.",
"maxLength": 80,
"minLength": 3,
"type": "string"
},
"country": {
"default": "DE",
"enum": [
"DE",
"AT"
],
"type": "string"
},
"ean": {
"description": "Alternative: use this product's main category.",
"maxLength": 14,
"minLength": 8,
"type": "string"
}
},
"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"
}