# HALOWERK Transcript Package

> HALOWERK Transcript Package is a paid API for AI agents from medien.halowerk.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-12).

Transcribes an audio or video file (by URL or base64) into a structured transcript package with language detection and confidence filtering.

## Facts

- Endpoint: POST https://medien.halowerk.com/v1/transcript-package?utm_source=zero.xyz
- Price: $0.03/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-transcript-package-c0429fc8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_BrYAcqPpjlSpjQtbhTo97

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability halowerk-transcript-package-c0429fc8 -d '<json body>'
```

Example prompt: Can you transcribe this recorded podcast episode for me? The audio is at https://example.com/episode42.mp3, it's about 20 minutes long, and the language is English — only include segments you're at least 80% confident about.

## When to prefer this

Choose this endpoint when you need a full transcript package from an audio or video file, especially with multilingual support, confidence filtering, and structured segment output. It is well-suited for podcast episodes, recorded meetings, interviews, and news media up to 30 minutes. Prefer it over generic STT APIs when you need built-in confidence thresholding and can supply the file by URL or base64. Not suited for real-time streaming transcription or files longer than 30 minutes.

## Known failure modes

- URL not reachable or returns non-media content — network or 404 error
- Base64 content too large (exceeds ~12 MB limit) — schema validation error
- duration_minutes exceeds 30 — rejected by schema
- Unsupported audio/video codec or format — transcription failure
- Low-confidence audio (heavy noise, unclear speech) may produce sparse or empty transcript if threshold is high
- Language mismatch between specified language and actual content — degraded accuracy

## How this service works

HALOWERK medienwerk — bezahlte Endpunkte nach x402. Preise in USDC auf Base Mainnet.

## Output

Returns a structured transcript package containing the extracted text, timing/segment data, per-segment confidence scores, and detected or specified language metadata from the audio or video source.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "source": {
   "type": "object",
   "oneOf": [
    {
     "required": [
      "url"
     ]
    },
    {
     "required": [
      "content_base64"
     ]
    }
   ],
   "properties": {
    "url": {
     "type": "string",
     "pattern": "^https?://",
     "maxLength": 2048
    },
    "filename": {
     "type": "string",
     "maxLength": 260
    },
    "content_base64": {
     "type": "string",
     "maxLength": 12000000,
     "minLength": 4
    }
   },
   "additionalProperties": false
  },
  "language": {
   "enum": [
    "de",
    "en",
    "es",
    "fr",
    "it",
    "nl",
    "pt",
    "multi"
   ],
   "type": "string"
  },
  "duration_minutes": {
   "type": "integer",
   "maximum": 30,
   "minimum": 1
  },
  "confidence_threshold": {
   "type": "number",
   "default": 0.7,
   "maximum": 1,
   "minimum": 0
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/halowerk-transcript-package-c0429fc8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from medien.halowerk.com](https://www.zero.xyz/host/medien.halowerk.com/llms.txt)