Welcome to Destined Voice API

Destined Voice helps companies to evaluate voice models and agents with globally representative voices and custom AI models.

Why Destined Voice?

10,000+ Real Voices

Diverse demographics including gender, age, region, and accent. All voices are from consented speakers.

Voice Generation

Generate new custom voices for your evals.

Voice Agent Evals

Evaluate speech-to-text providers with WER/CER metrics and demographic bias analysis.

Batch Processing

Generate audio for multiple speakers asynchronously with job tracking.

Quick Example

import { SDK } from "@destined-ai/voice";

const client = new SDK({
  bearerToken: process.env.DESTINED_API_KEY,
});

// Generate speech
const audio = await client.ttsGeneration.synthesizeSpeechV1TtsSynthesizePost({
  speakerId: "speaker-uuid",
  text: "Hello, welcome to Destined Voice!",
});

console.log(audio.audioUrl);

Features

Feature	Description
TTS Synthesis	Convert text to natural speech using any speaker voice
Speaker Browse	Filter speakers by gender, age, region, accent
Batch Jobs	Process multiple synthesis requests asynchronously
STT Evaluation	Evaluate providers such as Deepgram, AssemblyAI, OpenAI, Google, Azure, Amazon, Soniox
Dataset Import	Upload CSV files for bulk TTS generation
Usage Tracking	Monitor character usage and API calls

Next Steps

Quickstart

Get up and running in 5 minutes

API Reference

Explore all available endpoints

Why Destined

​Welcome to Destined Voice API

​Why Destined Voice?