Convert written text into speech through 9Router, choosing from multiple voice providers. Check available models and voices, then generate MP3 audio for narration, voiceovers, or reading text aloud.
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.
Review the instructions the agent will receive before you install.
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.
# 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).
POST $NINEROUTER_URL/v1/audio/speech
| Field | Required | Notes |
|---|---|---|
model | yes | voice ID from /v1/models/tts |
input | yes | text to speak |
Query ?response_format=mp3 (default, raw bytes) or ?response_format=json ({audio: base64, format}).
Save MP3:
curl -X POST "$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()));
Default → raw audio bytes (Content-Type audio/mp3).
?response_format=json:
{ "audio": "SUQzBAAAA...", "format": "mp3" }
| 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 |
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