What is openai-whisper-api?

A command-line tool that sends an audio file to OpenAI's Whisper speech-recognition service and saves the resulting transcript. A transcript is a written version of spoken audio.

Use it to transcribe M4A or OGG files, select a language, provide speaker-name hints, or save plain-text and JSON results.

It turns recordings into text without building your own audio-upload and transcription request.

openai-whisper-api — Skill for Claude Code and Codex by understudy-ai: A command-line tool that sends an audio file to…

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods

npx agentmods add skills/understudy-ai/understudy/openai-whisper-api

Any agent

npx skills add understudy-ai/understudy --skill openai-whisper-api

Clone the repo

git clone --depth 1 https://github.com/understudy-ai/understudy

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/understudy-ai/understudy/openai-whisper-api.svg)](https://agentmods.dev/skills/understudy-ai/understudy/openai-whisper-api)

Your own site

<a href="https://agentmods.dev/skills/understudy-ai/understudy/openai-whisper-api"><img src="https://agentmods.dev/badge/skills/understudy-ai/understudy/openai-whisper-api.svg" alt="Measured on agentmods" height="20"></a>

Per session 20 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 335 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. Scan, not verified.

Origin 95% copy Near-identical to another mod in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5	$0.00020	$0.00335
Opus 5	$0.00010	$0.00168
Sonnet 5	$0.00004	$0.00067
Haiku 4.5	$0.00002	$0.00034

Measured 4d ago against content hash ed11f6778ee0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

openai-whisper-api scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 4d ago.

The scan reads SKILL.md. This mod also ships 1 executable file (scripts/transcribe.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

"requires": { "bins": ["curl"], "env": ["OPENAI_API_KEY"] },

Origin

This is a copy

95% identical to openai-whisper-api — 4 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/openai-whisper-api/SKILL.md · 53 lines

What it actually says

OpenAI Whisper API (curl)

Transcribe an audio file via OpenAI’s /v1/audio/transcriptions endpoint.

Quick start

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

Defaults:

Model: whisper-1
Output: <input>.txt

Useful flags

{baseDir}/scripts/transcribe.sh /path/to/audio.ogg --model whisper-1 --out /tmp/transcript.txt
{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

API key

Set OPENAI_API_KEY, or configure it in ~/.understudy/config.json5:

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

Files

What ships with it

1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

scripts/transcribe.sh 1.4 KB runs code

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

4d ago First seen · 53 lines · 20 tokens per session scan A ed11f6778ee0

Subscribe to this mod's changes

openai-whisper-api is a skill published in the GitHub repository understudy-ai/understudy (457 stars, last pushed 2mo ago), licensed MIT. It adds 20 tokens to every session and 335 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). It is 95% identical to openai-whisper-api, differing in 4 lines, and is treated as a copy.

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