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HALOWERK Listening Quiz Generator
x402
HALOWERK Listening Quiz Generator is a paid API for AI agents from medien.halowerk.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-31).
Generates CEFR-leveled listening-comprehension exercises (multiple-choice and true/false questions with answers and timestamped quotes) from an audio recording of up to 30 minutes.
Price / call$0.03
Success—
StatusUnknown
How this service works
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.
Output
A structured set of multiple-choice questions (four options each) and true/false statements calibrated to the requested CEFR level, each with the correct answer identified and paired with the exact verbatim quote and audio timestamp where the answer can be heard, all rendered in the chosen output language.
Example use cases
Language exam prep material from lecture
“I have a 25-minute recorded university lecture at https://uni.example.com/lecture3.mp3 — can you create 10 multiple-choice listening comprehension questions at C1 level in English, with correct answers and the exact timestamps where each answer is spoken?”
A2 kids' listening exercises from audio story
“Take this short 8-minute children's audio story (I'll give you the URL: https://stories.example.com/tale.mp3) and make 5 true/false listening exercises at A2 level, output in Spanish, so young learners can practice.”
Corporate language training quiz
“We recorded a 15-minute business English meeting at https://training.example.com/meeting.mp3 — please generate a B1-level listening quiz with 6 questions in English so our non-native employees can use it for comprehension practice.”
Technical details
Endpoint
POSThttps://medien.halowerk.com/v1/listening-quiz?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to automatically generate structured listening-comprehension assessments tied to real audio content, especially when CEFR-level calibration, timestamped answer references, and multilingual output are required. It is ideal for language educators, e-learning platforms, and exam-prep tools that need to turn recordings (podcasts, lectures, meetings) into quiz material without manual authoring.
Side effects
- Audio file exceeds 30-minute limit — billing and processing cap exceeded
- Unsupported audio format or inaccessible URL — source file cannot be fetched
- Language detection fails if audio is too noisy or mixed-language
- duration_minutes mismatch causes incorrect billing
- Output language not supported returns validation error
- Base64 payload exceeds 12 MB limit — use URL instead
- Network timeout on long audio transcription/analysis
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| level | string | |
| source | object | The recording. Either url or content_base64. |
| language | string | Spoken language (BCP-47). Omit to detect. |
| questions | integer | |
| output_language | string | Language of labels and explanations. Default: spoken language. |
| duration_minutes | integer | Length in started minutes — this is what you are billed for. |
Tags
x402
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