SpeechifyAI Build

Build speech into your product with one API. Generate audio, stream long-form text, clone voices, and control delivery with SSML.

Your first request

POST
/v1/audio/speech
1curl -X POST https://api.speechify.ai/v1/audio/speech \
2     -H "Authorization: Bearer <token>" \
3     -H "Content-Type: application/json" \
4     -d '{
5  "input": "Hello! This is the Speechify text-to-speech API.",
6  "voice_id": "george",
7  "audio_format": "mp3",
8  "model": "simba-english"
9}'
Try it

Ready to run it end to end? The Quickstart walks you through your first call: get a key, install the SDK, generate speech, and play it.

Grab an API key at platform.speechify.ai/api-keys and set SPEECHIFY_API_KEY so the SDKs authenticate automatically.

Set up

Install an SDK

pip install speechify-api for Python, npm install @speechify/api for TypeScript. Both read SPEECHIFY_API_KEY from the environment automatically.

Authenticate

A single Authorization: Bearer key works for every endpoint. Manage and rotate keys in the console.

Build With Speech

Streaming

Start playback before the full audio is generated. Up to 20,000 characters per request.

Voice cloning

Clone any voice from a 10-30 second sample. Cloned voices work across every supported language.

SSML and emotion

Fine-grained control over pitch, rate, pauses, emphasis, and 13 emotion presets.

Speech marks

Word-level timestamps for highlighting, captions, and audio-text sync.

Models and languages

ModelBest forLanguagesHighlights
simba-englishFlagship English qualityEnglishHighest quality, full SSML + emotion control
simba-multilingualMultilingual and mixed-language input30+Same voice IDs across every language, no separate cloning required
simba-3.0Low-latency streamingEnglishLower TTFB, richer expressivity; multilingual coming soon

See Models and Language Support for the full matrix.

Resources

API Reference

Endpoint schemas, parameters, and response shapes.

Examples

End-to-end demo projects on GitHub.

Console

Manage API keys, voices, and billing.