# OpenAI Whisper Audio Transcriptions

> OpenAI Whisper Audio Transcriptions is a paid API for AI agents from OpenAI at openai.mpp.tempo.xyz, paid per call via MPP, $0.01/call, not verified (last probed 2026-10-11); 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 files into text using OpenAI's Whisper speech recognition model

## Facts

- Endpoint: POST https://openai.mpp.tempo.xyz/v1/audio/transcriptions?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 10
- Provider: OpenAI
- Docs: https://platform.openai.com/docs
- Website: https://openai.com
- Tags: llm, gpt-4o, dall-e, whisper, tts, embeddings, chat, ai, media
- Canonical page: https://www.zero.xyz/c/openai-transcriptions-71bd2c98
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rSygbtpMdA1o7QuWCrmkp

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 openai-transcriptions-71bd2c98 -d '<json body>'
```

Example prompt: Can you transcribe this audio file for me? It's an MP3 of a 10-minute interview — use Whisper to convert the speech to text and give me the full transcript in plain text format.

## When to prefer this

Choose this endpoint when you need to convert audio recordings — meetings, interviews, voice memos, podcasts — into text using state-of-the-art Whisper speech recognition. Prefer this over other transcription services when accuracy and broad language support are priorities, or when you're already using OpenAI's ecosystem. Best suited for single audio file transcription tasks under 25MB.

## Known failure modes

- Audio file format not supported (must be mp3, mp4, mpeg, mpga, m4a, wav, webm)
- File size exceeds 25MB limit
- Audio too short or silent — returns empty transcript
- Language not recognized or poorly detected
- Network timeout on large audio files
- Invalid or missing audio file in request body
- Unsupported response_format value

## How this service works

Transcribe audio with Whisper

## Output

A text transcript of the spoken content in the submitted audio file, produced by OpenAI's Whisper model. Returns the recognized speech as a string (or structured JSON depending on response_format), and may include detected language information.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/openai-transcriptions-71bd2c98/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from openai.mpp.tempo.xyz](https://www.zero.xyz/host/openai.mpp.tempo.xyz/llms.txt)