Takes a recording of up to 30 minutes and creates listening-comprehension exerci
Takes a recording of up to 30 minutes and creates listening-comprehension exercises like those in language exams: multiple-choice questions with four options and true/false statements, at the chosen CEFR level, in the learner's or the recording's language. Every question comes with the correct answer and the exact passage (quote and timestamp) where the answer is heard, so learners can replay it.
Answeringour last check, 2026-10-31
1 of 1checks answered this week
1408 msmedian answer time
$0.03listed price per call
$0.03price 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://medien.halowerk.com/v1/listening-quiz
| Category | Everything else |
|---|---|
| Provider host | medien.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 |
|---|---|---|---|---|
| 2026-10-31 | valid payment request | 402 | $0.03 | 1408 ms |
Example input (from the provider)
{
"body": {
"duration_minutes": 1,
"language": "en",
"level": "A2",
"questions": 4,
"source": {
"url": "https://medien.halowerk.com/beispiel/vortrag.mp4"
}
},
"bodyType": "json",
"method": "POST",
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"body": {
"additionalProperties": false,
"properties": {
"duration_minutes": {
"description": "Length in started minutes \u2014 this is what you are billed for.",
"maximum": 30,
"minimum": 1,
"type": "integer"
},
"language": {
"description": "Spoken language (BCP-47). Omit to detect.",
"maxLength": 12,
"type": "string"
},
"level": {
"default": "B1",
"enum": [
"A1",
"A2",
"B1",
"B2",
"C1",
"C2"
],
"type": "string"
},
"output_language": {
"description": "Language of labels and explanations. Default: spoken language.",
"enum": [
"de",
"en",
"es",
"fr",
"it",
"nl",
"pt",
"pl",
"tr",
"sv",
"da",
"cs",
"ru",
"uk",
"ja",
"zh",
"ko",
"ar"
],
"type": "string"
},
"questions": {
"default": 6,
"maximum": 20,
"minimum": 2,
"type": "integer"
},
"source": {
"additionalProperties": false,
"description": "The recording. Either url or content_base64.",
"properties": {
"content_base64": {
"description": "The file inline, base64. Larger files by url.",
"maxLength": 12000000,
"type": "string"
},
"filename": {
"maxLength": 260,
"type": "string"
},
"url": {
"description": "Public http(s) URL of the file.",
"maxLength": 2048,
"type": "string"
}
},
"type": "object"
}
},
"required": [
"source",
"duration_minutes"
],
"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"
}