# Openai Whisper API

> OpenAI Audio Transcriptions API via curl; gpt-4o-transcribe, mini, diarize, or whisper-1.

- Skill: `promisingcoder/openai-whisper-api` (Agent Skill, multi-file: 2 files)
- Install (CLI): `npx skillmds@latest add promisingcoder/openai-whisper-api`
- Raw SKILL.md: https://api.skillmd.com/api/skills/promisingcoder/openai-whisper-api/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector CAUTION)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Integrations & APIs
- Author: promisingcoder (https://skillmd.com/u/promisingcoder)
- Updated: 2026-08-19
- Page: https://skillmd.com/skills/promisingcoder/openai-whisper-api

---


# OpenAI transcriptions API

Transcribe audio through `/v1/audio/transcriptions`. Set `OPENAI_BASE_URL` for an OpenAI-compatible proxy or local gateway.

## Quick start

```bash
{baseDir}/scripts/transcribe.sh /path/to/audio.m4a
```

Defaults:

- Model: `gpt-4o-transcribe`
- Output: `<input>.txt`

## Useful flags

```bash
{baseDir}/scripts/transcribe.sh /path/to/audio.ogg --model gpt-4o-transcribe --out /tmp/transcript.txt
{baseDir}/scripts/transcribe.sh /path/to/audio.ogg --model gpt-4o-mini-transcribe
{baseDir}/scripts/transcribe.sh /path/to/audio.ogg --model gpt-4o-transcribe-diarize --json
{baseDir}/scripts/transcribe.sh /path/to/audio.ogg --model whisper-1
{baseDir}/scripts/transcribe.sh /path/to/audio.m4a --language en
{baseDir}/scripts/transcribe.sh /path/to/audio.m4a --prompt "Speaker names: Peter, Daniel"
{baseDir}/scripts/transcribe.sh /path/to/audio.m4a --json --out /tmp/transcript.json
```

Notes:

- Supported upload formats include `mp3`, `mp4`, `mpeg`, `mpga`, `m4a`, `wav`, `webm`.
- 25 MB upload limit on the hosted API.
- Use diarize for speaker labels; script sends `chunking_strategy=auto` and rejects `--prompt`.

## API key

Set `OPENAI_API_KEY`, or configure it in the active MarketingClaw config file (`$MARKETINGCLAW_CONFIG_PATH`, default `~/.marketingclaw/marketingclaw.json`). Optionally set `OPENAI_BASE_URL`:

```json5
{
  skills: {
    "openai-whisper-api": {
      apiKey: "OPENAI_KEY_HERE",
    },
  },
}
```