Google AI (Gemini API)Voice GenerationAI generation

Google: Gemini 3.8 Flash-Lite TTS

google-ai.voice-gen.gemini-3-8-flash-lite-tts

Speak a text in one of 30 prebuilt voices, or a two-speaker dialogue, with Gemini 3.8 Flash-Lite TTS on Google's own API; the audio returns inline as base64 WAV (24 kHz mono).

Price: $0.035/successAt provider cost
Success rate: 100%Last 30 days · 550 calls
Latency p50: 3.2 sp95 8.6 s
Last verified: Sep 30, 2026Verified working

POSThttps://toolswitch.dev/v1/tools/google-ai.voice-gen.gemini-3-8-flash-lite-ttsPreview

Try onlineComing soonProvider docs ↗

Uses platform quota
Synchronous response
Reads public data

Parameters

Parameter	Type	Required	Description	Example
Path parameters
`model`	string	Required		`gemini-3.8-flash-lite-tts`

Path parameters
modelstringRequired
Example: gemini-3.8-flash-lite-tts

Code samples

Replace $TOOLSWITCH_KEY with the key you created in the console.

Preview

curl -X POST 'https://toolswitch.dev/v1/tools/google-ai.voice-gen.gemini-3-8-flash-lite-tts' \
  -H "X-Toolswitch-Key: $TOOLSWITCH_KEY" \
  -H "Content-Type: application/json" \
  --data-raw '{"contents":[{"parts":[{"text":"Say cheerfully: Welcome to treg, the tool catalog for your agents."}]}],"generationConfig":{"speechConfig":{"voiceConfig":{"prebuiltVoiceConfig":{"voiceName":"Kore"}}},"responseModalities":["AUDIO"]}}'

import os
import json
import requests

response = requests.request(
    "POST",
    "https://toolswitch.dev/v1/tools/google-ai.voice-gen.gemini-3-8-flash-lite-tts",
    headers={"X-Toolswitch-Key": os.environ["TOOLSWITCH_KEY"]},
    json=json.loads("{\"contents\":[{\"parts\":[{\"text\":\"Say cheerfully: Welcome to treg, the tool catalog for your agents.\"}]}],\"generationConfig\":{\"speechConfig\":{\"voiceConfig\":{\"prebuiltVoiceConfig\":{\"voiceName\":\"Kore\"}}},\"responseModalities\":[\"AUDIO\"]}}"),
)
response.raise_for_status()
print(response.text)

const response = await fetch("https://toolswitch.dev/v1/tools/google-ai.voice-gen.gemini-3-8-flash-lite-tts", {
  method: "POST",
  headers: {
    "X-Toolswitch-Key": process.env.TOOLSWITCH_KEY ?? "",
    "Content-Type": "application/json",
  },
  body: JSON.stringify(JSON.parse("{\"contents\":[{\"parts\":[{\"text\":\"Say cheerfully: Welcome to treg, the tool catalog for your agents.\"}]}],\"generationConfig\":{\"speechConfig\":{\"voiceConfig\":{\"prebuiltVoiceConfig\":{\"voiceName\":\"Kore\"}}},\"responseModalities\":[\"AUDIO\"]}}")),
});
if (!response.ok) throw new Error(`Request failed: ${response.status}`);
console.log(await response.text());

This gateway API is in preview; its URL and authentication may change. The example parameters are sample data. Calls are billed at $0.035/success, including the service fee.