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HALOWERK Voice Note Task & Event Extractor
x402
HALOWERK Voice Note Task & Event Extractor 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).
Transcribes a voice note of up to 10 minutes and extracts structured tasks (with due dates), events (with start/end times), contacts (with phone/email), and notes, resolving relative date expressions against a reference time and timezone.
Price / call$0.03
Success—
StatusUnknown
How this service works
Takes a voice note or memo of up to 10 minutes and returns its contents as separate entries: tasks with due date, events with start and end, contacts with spoken phone number or e-mail, and notes. Relative expressions such as "tomorrow", "next Tuesday" or "end of the month" are resolved against reference_time in the given IANA time zone, and every entry carries the verbatim phrase it was taken from, checked against the transcript.
Output
Returns a structured JSON object with separate arrays for tasks (each with due date and verbatim phrase), events (each with start time, end time, and verbatim phrase), contacts (each with name, phone number or email, and verbatim phrase), and notes — all with relative date expressions resolved to absolute timestamps in the specified timezone.
Example use cases
Morning voice memo to task list
“I recorded a 2-minute voice note this morning where I rattled off everything I need to do this week — can you pull out all the tasks and their due dates from it? My timezone is Europe/London and I recorded it today at 8am. Here's the file: https://myfiles.example.com/morning-memo.mp3”
Meeting notes to calendar events
“I have a 5-minute voice recording from after my meeting where I described a few follow-up appointments and deadlines. Please extract all the events with start and end times — I'm in the America/Chicago timezone and the recording was made today at 2pm. The file is at https://storage.example.com/meeting-followup.wav”
Spoken contact list extraction
“I dictated the contact details of three people I met today into a 1-minute voice note — names, phone numbers, and emails. Can you pull out each contact from the recording? I'm in Europe/Berlin timezone and recorded it just now. Here's the audio in base64: [base64string]”
Technical details
Endpoint
POSThttps://medien.halowerk.com/v1/voice-note-tasks?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need to convert unstructured voice memos into multiple structured entity types simultaneously — tasks, events, contacts, and notes — especially when the audio contains relative date expressions like 'tomorrow' or 'next Friday' that need to be resolved against a specific reference time and timezone. It is ideal for productivity and personal assistant workflows where a user dictates a mixed bag of action items. Prefer this over generic transcription APIs when structured extraction with date resolution is required, and over calendar-specific APIs when you also need tasks and contacts extracted in a single pass.
Side effects
- Audio file URL is inaccessible or returns an error — endpoint cannot retrieve or decode the file
- Recording exceeds 10 minutes — rejected with a duration validation error
- Unsupported audio format — transcription fails
- Language detection fails for ambiguous or mixed-language recordings
- Reference time is missing or malformed — relative date resolution falls back to server time
- base64 payload too large (>12MB) — request rejected; use URL instead
- Timezone string is invalid IANA identifier — date resolution errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| source | object | The recording. Either url or content_base64. |
| language | string | Spoken language (BCP-47). Omit to detect. |
| timezone | string | IANA time zone for relative dates. |
| reference_time | string | ISO 8601 time the note refers to, e.g. when it was recorded. Default: now. |
| duration_minutes | integer | Length in started minutes — this is what you are billed for. |
Tags
x402
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