Calculates TTW and WTW fuel emissions from separately published factors
Calculates TTW and WTW fuel emissions from separately published factors. Missing facts are returned as null and named in unavailable_fields where applicable. Derived values disclose their method; source-backed values disclose source, time window and age. This is neither legal advice nor customs advice.
Answeringour last check, 2026-10-24
1 of 1checks answered this week
891 msmedian answer time
$0.004listed price per call
$0.004price 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://klima.halowerk.com/v1/fuel-co2
| Category | Everything else |
|---|---|
| Provider host | klima.halowerk.com |
| Networks | eip155:8453 |
| Payment schemes | exact |
| Self-reported calls, 30 days | 2 from 2 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-24 | valid payment request | 402 | $0.004 | 891 ms |
Example input (from the provider)
{
"body": {
"quantity": 100,
"source": {
"published_at": "2026-06-10T00:00:00Z",
"title": "UK 2026 conversion factors",
"url": "https://www.gov.uk/government/publications/greenhouse-gas-reporting-conversion-factors-2026"
},
"ttw_factor": 2,
"unit": "litre",
"wtw_factor": 2.5
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"quantity": {
"description": "",
"maximum": 1000000000000,
"minimum": 0,
"type": "number"
},
"source": {
"additionalProperties": false,
"properties": {
"published_at": {
"format": "date-time",
"type": "string"
},
"title": {
"description": "",
"maxLength": 300,
"minLength": 3,
"type": "string"
},
"url": {
"format": "uri",
"type": "string"
}
},
"required": [
"url",
"published_at",
"title"
],
"type": "object"
},
"ttw_factor": {
"description": "",
"maximum": 1000000000000,
"minimum": 0,
"type": "number"
},
"unit": {
"description": "",
"maxLength": 512,
"minLength": 1,
"type": "string"
},
"wtw_factor": {
"description": "",
"maximum": 1000000000000,
"minimum": 0,
"type": "number"
}
},
"required": [
"quantity",
"unit",
"ttw_factor",
"wtw_factor",
"source"
],
"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"
}