Speech synthesis API for products and media
Add speech generation to your website, app, CMS, media platform, LMS or internal product. The HancVoice REST API works with system and custom voices, voice creation, transcription and streaming speech.
Media and articles
Automatically create audio versions of publications, digests and long-reads.
EdTech and LMS
Voice lessons, quizzes, hints and course updates without manual recording.
Product scenarios
Voice notifications, IVR, assistants, instructions and personalized audio snippets.
What the developer gets
The API covers the core path «text → WAV/MP3», streaming generation, the voice catalog, voice creation, transcription and engine health checks. No SDK promises: plain REST and ordinary HTTP requests. The API is available from the Starter plan and up; the text length per request is capped by your plan.
API limits and plans
API access opens from the Starter plan. Request rate and length grow with your plan.
WAVMP3PCM stream10 languagessystem voicescustom voicesown voice creationtranscription
API questions
An API key is issued from the Starter plan and up. The request rate limit and text length per request depend on your plan — see the documentation for exact values.
WAV and MP3 for finished files, and PCM for streaming generation via /api/v1/tts_stream when a fast playback start matters.
Yes. POST /api/v1/tts_stream returns PCM as synthesis progresses — this reduces the time to first sound in voice interfaces and assistants.
Sign up, upgrade to the Starter plan or higher and create a key in your dashboard. Request examples and the full method reference are in the developer documentation.
Integrate speech into your product
Get an API key and test generation on your own texts.