/tools namespace · APlicious

Text-to-speech API — 6 OpenAI voices, any format, one endpoint

POST any text to /tools/tts and get back an audio file in your chosen format and voice — backed by OpenAI's TTS model, no separate OpenAI key needed.

6voice options

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POST /api/v1/tools/tts

const res = await fetch('https://aplicious.com/api/v1/tools/tts', {
  method: 'POST',
  headers: { 'X-API-Key': 'lapi_live_••••', 'Content-Type': 'application/json' },
  body: JSON.stringify({ text: 'Hello, world!', voice: 'nova', format: 'mp3', speed: 1.0 }),
});
// Response: audio/mpeg binary — pipe directly to a file or <audio> src blob URL

No credit card · Free to start · X-API-Key header auth

What's included in /tools

6 voice options

alloy, echo, fable, onyx, nova, and shimmer — covering neutral, expressive, and authoritative speaking styles.

6 output formats

mp3 (default), opus, aac, flac, wav, and raw pcm — choose what your audio pipeline needs.

Speed control

Adjust playback speed from 0.25× to 4× without external post-processing.

No OpenAI account needed

One APlicious key replaces your own OpenAI API key and billing setup.

Pairs with /transcribe

TTS → audio file → transcribe back — useful for roundtrip quality tests or accessibility pipelines.

Start using the text to speech API free today

Free tier — 250 calls/month, no credit card. Upgrade when you need more.

Get free API key Explore /tools docs

Frequently asked questions

What is the maximum text length?

4,096 characters per request. For longer texts, split into chunks and concatenate the audio files.

What voice should I use for a professional product?

'onyx' and 'alloy' are the most neutral and widely used for product announcements. 'nova' works well for conversational interfaces.

Can I use this for a mobile app?

Yes — the endpoint returns binary audio data. Stream it directly to an audio player on iOS, Android, or web.

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