# ZeroReader Whisper Large v3 Turbo — Speech-to-Text Transcription

> ZeroReader Whisper Large v3 Turbo — Speech-to-Text Transcription is a paid API for AI agents from api.zeroreader.com, paid per call via x402, $0.01/call, not verified (last probed 2026-10-10); live alternatives: AgentUtility Video Transcription ($0.1) and medien.halowerk.com Speech-to-Text ($0.02).

Agents call it through Zero, which pays per call: no API key and no wallet of your own. New accounts start with $5.

Live alternatives for the same use case:
- [AgentUtility Video Transcription](https://www.zero.xyz/c/agentutility-video-transcription-whisper-v3-83d051eb) ($0.1)
- [medien.halowerk.com Speech-to-Text](https://www.zero.xyz/c/medien-halowerk-com-speech-to-text-stt-22257e66) ($0.02)

Transcribes audio to text using OpenAI's Whisper Large v3 Turbo model, offering high accuracy and fast inference

## Facts

- Endpoint: POST https://api.zeroreader.com/v1/ai/whisper-large?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-10
- Success rate: 0% of calls made through Zero
- Activations on Zero: 2
- Tags: x402
- Canonical page: https://www.zero.xyz/c/zeroreader-whisper-large-v3-turbo-speech-to-text-transcription-9b48a231
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_n4KcBXld9S5MJ_SPh4RcN

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 zeroreader-whisper-large-v3-turbo-speech-to-text-transcription-9b48a231 -d '<json body>'
```

Example prompt: Can you transcribe this audio recording for me using Whisper Large v3 Turbo? Here's the binary audio data — I need the full text of what was said.

## When to prefer this

Choose this endpoint when you need fast, high-accuracy speech-to-text transcription powered specifically by Whisper Large v3 Turbo, especially when integrating with the ZeroReader API ecosystem and paying per-call via USDC x402 micropayments. Prefer this over older Whisper variants when accuracy and speed are both priorities.

## Known failure modes

- Invalid or corrupted audio binary data returns an error
- Unsupported audio format may fail silently or return empty text
- Audio too long or too large may time out or exceed limits
- Missing 'audio' field in request body returns a validation error
- Payment not completed (x402) results in a 402 response blocking access

## How this service works

Whisper Large v3 Turbo — Latest Whisper. Better accuracy, faster.

## Output

A JSON object containing a 'text' field with the full transcribed text extracted from the provided audio binary data.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "audio": {
   "type": "string",
   "description": "Audio data as binary"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "text": "Transcribed text from audio"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/zeroreader-whisper-large-v3-turbo-speech-to-text-transcription-9b48a231/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.zeroreader.com](https://www.zero.xyz/host/api.zeroreader.com/llms.txt)