extremerouter-stt

extremerouter-stt is a skill for Claude Code, Codex from rsalmn/ExtremeRouter. It costs 64 tokens per session (968 once invoked), scanned A, original, MIT.

A speech-to-text interface that sends audio to selected transcription models and returns written text or subtitle files.

In plain words
What is it for?
Use it for transcribing audio files, choosing a speech model, specifying a language, and producing JSON, plain text, SRT, or VTT subtitles.
Why use it?
It removes the need to transcribe recordings manually or connect separately to each supported speech service.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it for transcribing audio files, choosing a speech model, specifying a language, and producing JSON, plain text, SRT, or VTT subtitles.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/rsalmn/extremerouter/extremerouter-stt
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.

Any agent
npx skills add rsalmn/ExtremeRouter --skill extremerouter-stt
Clone the repo
git clone --depth 1 https://github.com/rsalmn/ExtremeRouter

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.

agentmods badge for extremerouter-stt

README.md
[![agentmods](https://agentmods.dev/badge/skills/rsalmn/extremerouter/extremerouter-stt.svg)](https://agentmods.dev/skills/rsalmn/extremerouter/extremerouter-stt)
Your own site
<a href="https://agentmods.dev/skills/rsalmn/extremerouter/extremerouter-stt"><img src="https://agentmods.dev/badge/skills/rsalmn/extremerouter/extremerouter-stt.svg" alt="Measured on agentmods" height="20"></a>
Per session 64 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 968 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector warn 7 Sept 2026
SkillSpector: 1 finding, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

  • medium Agent Snooping · line 8
    Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.
    Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
How audits are shown
Origin original No closer match found 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00064 $0.00968
Opus 5 $0.00032 $0.00484
Sonnet 5 $0.00013 $0.00194
Haiku 4.5 $0.00006 $0.00097

Measured 8d ago against content hash 5e204fac2745, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

extremerouter-stt 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 8d ago.

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.

curl $NINEROUTER_URL/v1/models/stt | jq '.data[].id'
skills/extremerouter-stt/SKILL.md · 80 lines

How it starts

The opening of the file, as written. The whole thing — 80 lines — stays where its author put it; the contents beside it link to each section on GitHub.

ExtremeRouter — Speech-to-Text

Requires NINEROUTER_URL (and NINEROUTER_KEY if auth enabled). See https://raw.githubusercontent.com/rsalmn/extremerouter/refs/heads/master/skills/extremerouter/SKILL.md for setup.

Discover

curl $NINEROUTER_URL/v1/models/stt | jq '.data[].id'
# Per-model params (language, response_format, prompt, temperature support)
curl "$NINEROUTER_URL/v1/models/info?id=openai/whisper-1"

model = STT model ID (e.g. openai/whisper-1, groq/whisper-large-v3, deepgram/nova-3, gemini/gemini-2.5-flash).

Endpoint

POST $NINEROUTER_URL/v1/audio/transcriptions (OpenAI Whisper compatible, multipart/form-data)

Field Required Notes
model yes from /v1/models/stt
file yes audio file (mp3, wav, m4a, webm, ogg, flac)
language no ISO-639-1 (e.g. en, vi)
prompt no hint text to guide transcription
response_format no json (default) / text / verbose_json / srt / vtt
temperature no 0–1

Examples

curl -X POST "$NINEROUTER_URL/v1/audio/transcriptions" \
  -H "Authorization: Bearer $NINEROUTER_KEY" \
  -F "model=openai/whisper-1" \
  -F "[email protected]" \
  -F "language=vi"

JS (Node):

import { createReadStream } from "node:fs";
const form = new FormData();
form.append("model", "groq/whisper-large-v3-turbo");
form.append("file", new Blob([await (await import("node:fs/promises")).readFile("audio.mp3")]), "audio.mp3");
const r = await fetch(`${process.env.NINEROUTER_URL}/v1/audio/transcriptions`, {
  method: "POST",
  headers: { "Authorization": `Bearer ${process.env.NINEROUTER_KEY}` },
  body: form,
});
const { text } = await r.json();
console.log(text);

Response shape

Default (response_format=json):

{ "text": "Xin chào, đây là bản ghi âm." }

verbose_json adds language, duration, segments[] with timestamps. srt / vtt return subtitle text.

Provider quirks

Provider model format Notes
openai whisper-1, gpt-4o-transcribe, gpt-4o-mini-transcribe Native OpenAI shape
groq whisper-large-v3, whisper-large-v3-turbo, distil-whisper-large-v3-en Fastest; OpenAI shape
gemini gemini-2.5-flash, gemini-2.5-pro, gemini-2.5-flash-lite Server converts to generateContent with audio inline
deepgram nova-3, nova-2, whisper-large Token auth; server adapts response
assemblyai universal-3-pro, universal-2 Async upload+poll handled server-side
nvidia nvidia/parakeet-ctc-1.1b-asr NIM endpoint
huggingface openai/whisper-large-v3, openai/whisper-small HF Inference API

Read the full file on GitHub · 80 lines

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.

  1. 8d ago First seen · 80 lines · 64 tokens per session scan A 5e204fac2745

Subscribe to this mod's changes

extremerouter-stt is a skill published in the GitHub repository rsalmn/ExtremeRouter (31 stars, last pushed yesterday), licensed MIT. It adds 64 tokens to every session and 968 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.