/9router-tts

name: 9router-tts
description: Text-to-speech via 9Router /v1/audio/speech using OpenAI / ElevenLabs / Deepgram / Edge TTS / Google TTS / Hyperbolic / Inworld voices. Use when the user wants to convert text to speech, generate audio, voiceover, narrate, or read text aloud.

9Router — Text-to-Speech

Requires `NINEROUTER_URL` (and `NINEROUTER_KEY` if auth enabled). See https://raw.githubusercontent.com/decolua/9router/refs/heads/master/skills/9router/SKILL.md for setup.

Discover

# 1) List models
curl $NINEROUTER_URL/v1/models/tts | jq '.data[].id'
# 2) Per-model metadata (params, voicesUrl if voice-by-id)
curl "$NINEROUTER_URL/v1/models/info?id=el/eleven_multilingual_v2"
# 3) List voices (elevenlabs, edge-tts, deepgram, inworld, local-device). Optional ?lang=vi
curl "$NINEROUTER_URL/v1/audio/voices?provider=edge-tts&lang=vi" | jq '.data[].model'

`model` field in `/v1/audio/speech` = voice ID directly (e.g. `edge-tts/vi-VN-HoaiMyNeural`, `el/<voice_id>`, or `openai/tts-1` model+default voice).

Endpoint

`POST $NINEROUTER_URL/v1/audio/speech`

| Field | Required | Notes | |---|---|---| | `model` | yes | voice ID from `/v1/models/tts` | | `input` | yes | text to speak |

Query `?response_format=mp3` (default, raw bytes) or `?response_format=json` (`{audio: base64, format}`).

Examples

Save MP3:

curl -X POST "$NINEROUTER_URL/v1/audio/speech" \
  -H "Authorization: Bearer $NINEROUTER_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"openai/tts-1","input":"Hello world"}' \
  --output speech.mp3

JS (save file):

import { writeFile } from "node:fs/promises";
const r = await fetch(`${process.env.NINEROUTER_URL}/v1/audio/speech`, {
  method: "POST",
  headers: { "Authorization": `Bearer ${process.env.NINEROUTER_KEY}`, "Content-Type": "application/json" },
  body: JSON.stringify({ model: "el/eleven_multilingual_v2", input: "Xin chào" }),
});
await writeFile("speech.mp3", Buffer.from(await r.arrayBuffer()));

Response shape

Default → raw audio bytes (Content-Type `audio/mp3`).

`?response_format=json`:

{ "audio": "SUQzBAAAA...", "format": "mp3" }

Provider quirks (model format)

| Provider | `model` format | Notes | |---|---|---| | `openai` | `tts-1/alloy` (model/voice) or just voice | Default model `gpt-4o-mini-tts` | | `elevenlabs` | `<model_id>/<voice_id>` or `<voice_id>` | Default model `eleven_flash_v2_5`; list voices in Dashboard | | `openrouter` | `openai/gpt-4o-mini-tts/alloy` | Streamed via chat-completions audio modality | | `edge-tts` | voice id e.g. `vi-VN-HoaiMyNeural` | **noAuth**; default `vi-VN-HoaiMyNeural` | | `google-tts` | language code e.g. `en`, `vi` | **noAuth** | | `local-device` | OS voice name (`say -v ?` / SAPI) | **noAuth**; needs `ffmpeg` | | `deepgram` | `aura-asteria-en` etc | Token auth | | `nvidia`, `inworld`, `cartesia`, `playht` | `model/voice` | Provider-specific auth header | | `coqui`, `tortoise` | speaker / voice id | Localhost noAuth | | `hyperbolic` | model id | Body = `{text}` only |