# Neurodynamic Whisper Large-v3-Turbo Audio Transcription

> Neurodynamic Whisper Large-v3-Turbo Audio Transcription is a paid API for AI agents from api.neurodynamic.tech, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Transcribes a short audio clip (WAV, MP3, FLAC, or Ogg, up to 60 seconds / 12 MiB) to JSON text using Whisper large-v3-turbo, for 0.01 USDC per call.

## Facts

- Endpoint: POST https://api.neurodynamic.tech/v1/audio/transcriptions
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/neurodynamic-whisper-large-v3-turbo-audio-transcription-e64b7c7d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_UVweoQbnov1qmBvq84tiG

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 neurodynamic-whisper-large-v3-turbo-audio-transcription-e64b7c7d -d '<json body>'
```

Example prompt: Can you transcribe this 45-second MP3 voice recording for me and give me the text? The speaker is talking in English.

## When to prefer this

Choose this endpoint when you need fast, affordable speech-to-text transcription for clips up to 60 seconds and 12 MiB in WAV, MP3, FLAC, or Ogg format, and you want to pay per call via USDC on Base with no subscription. It uses the Whisper large-v3-turbo model, making it a strong choice for high-accuracy multilingual transcription at very low cost per clip.

## Known failure modes

- Audio file exceeds 60-second duration limit — request rejected
- File size exceeds 12 MiB — request rejected
- Unsupported audio format submitted (e.g. AAC, M4A) — error returned
- Payment of 0.01 USDC on Base not provided or insufficient — 402 Payment Required
- Unintelligible or silent audio — empty or low-quality transcript returned
- Incorrect language code format (not two lowercase letters) — validation error

## How this service works

Introductory pricing. NeuroDynamic speech-to-text transcription: convert a voice note or short audio recording into a JSON transcript. Up to 60 seconds and 12 MiB; WAV, MP3, FLAC or Ogg. No account needed. Read https://api.neurodynamic.tech/docs for inputs, privacy and payment recovery. 0.01 USDC on Base.

## Output

A JSON object containing the transcribed text of the submitted audio clip, produced by the Whisper large-v3-turbo model. The transcript field holds the plain text of the recognized speech.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "file": {
   "type": "string",
   "format": "binary",
   "description": "WAV, MP3, FLAC or Ogg; max 60 seconds and 12 MiB"
  },
  "model": {
   "enum": [
    "whisper-1"
   ],
   "type": "string"
  },
  "language": {
   "type": "string",
   "pattern": "^[a-z]{2}$"
  },
  "response_format": {
   "enum": [
    "json"
   ],
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "text": "Example transcript.",
  "duration_seconds": 4
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/neurodynamic-whisper-large-v3-turbo-audio-transcription-e64b7c7d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.neurodynamic.tech](https://www.zero.xyz/host/api.neurodynamic.tech/llms.txt)